Thinking of buying an LT35 -82 with engine problem
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Category: LT, Crafter & Sprinter Section
Forum Name: LT, Crafter & Sprinter Tech
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URL: http://www.brick-yard.co.uk/forum/forum_posts.asp?TID=82962
Printed Date: 23 Apr 24 at 18:59
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Topic: Thinking of buying an LT35 -82 with engine problem
Posted By: Widar
Subject: Thinking of buying an LT35 -82 with engine problem
Date Posted: 29 Nov 13 at 07:26
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Hey everyone, new here. All google searches i made always had brick-yard results in them so i guess i had to register. ;) So, Me and the mrs are looking for a nice, cheaper camper and the LT-series seems to do the trick. In Sweden cars older than 30 years have MOT every second year and are free from road taxes so we're looking for something older. A couple of days ago i saw this on a swedish for sale site; http://www.blocket.se/blekinge/Volkswagen_vw_LT_35_husbil__82_for_handig_50882139.htm?ca=16&w=3" rel="nofollow - http://www.blocket.se/blekinge/Volkswagen_vw_LT_35_husbil__82_for_handig_50882139.htm?ca=16&w=3 It's cheap, has MOT until summer 2015 and looks to be in good condition. But the problem is that, and I'll do my best to explain in english, that it doesn't rev and is very weak. From what i can tell it's a 4cyl 2L (1982). It's currently at a shop, but they couldn't fix it(modern mechanics..?). They managed to get it running from cleaning the carburetor but the problem came back. The seller says it's so weak that it won't make it into 3rd gear nor above 20 kph. So now i turn to the knowledge, what do you think? From what i've found a Weber 36 would be an alternative to the original carbutor? Thanks, Widar
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Replies:
Posted By: LTCamper89
Date Posted: 29 Nov 13 at 09:46
Welcome Widar, The petrol lads will be along soon with an idea or two. If the compression, timing, sparks have all been checked and are fine, then it is probably old, dirty or interrupted fuel supply. Good luck.  ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: Widar
Date Posted: 29 Nov 13 at 10:20
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Thank you! I've asked the seller if compression has been checked, waiting to hear back. I just think that it's strange that the repair shop (big seller of VAG group as well) haven't been able to fix it. That's what makes me worried. We'll see. I dunno if i'm willing to take a chance on it, it's a big hassle getting it here since it's about 160 miles from here... Don't want to tow anything that distance.
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Posted By: LTCamper89
Date Posted: 29 Nov 13 at 11:02
.....and have huge hassle afterwards. The fact that the garage is VAG does not mean they have the expertise in older vehicles. ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Widar wrote:Posted By: Canada LT28
Date Posted: 29 Nov 13 at 12:49
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I think for that price (reduce if possible) it is worth it to change the engine to a diesel. Otherwise it looks like a good van, from what I can see. ------------- 94 LT28 Doka 2.4D Slow and built to stay that way 87 T3 soon to be a camper |
Posted By: Dreamcatcher
Date Posted: 29 Nov 13 at 18:49
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Welcome Widar. It could be something as simple as the vacuum advance not advancing the ignition as the revs build, this will give the symptoms you describe. ------------- Dave 1991 LT31 Camper |
Posted By: Widar
Date Posted: 30 Nov 13 at 10:34
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Thanks for the inputs and welcome! Please tell me more about the vacuum advanve! Or where i can see and read about it :) Got more info from the seller, apparently the repair shop have only looked at the van when they had spare time and that didn't happen often... They believe it's the carburetor sknce it worked adter cleaning. I still dont know if a compression test have been made and told the sellers that i want it done before we procede. Me and the mrs really like the van and off course the price, about 2000 gbp chaper than other ones ive seen for sale. Thanks! |
Posted By: LTCamper89
Date Posted: 30 Nov 13 at 11:45
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Right at the bottom of the page is a Google Search bar which is set to the brick-yard, but you can change it to the Web. The results in the brick-yard are from all forums. http://https://www.google.com/search?q=vacuum+advance&sitesearch=www.brick-yard.co.uk" rel="nofollow - http://https://www.google.com/search?q=vacuum+advance&sitesearch=www.brick-yard.co.uk By using the Advanced Search facility, up in the top left of the page, you can specify which forum the results come from, thereby narrowing the results to ones which may help more. http://www.brick-yard.co.uk/forum/search_results_posts.asp?SearchID=20131130114044&KW=vacuum+advance" rel="nofollow - http://www.brick-yard.co.uk/forum/search_results_posts.asp?SearchID=20131130114044&KW=vacuum+advance I think there are more OldTimers on the continent, so you may find more Perkins petrol on http://www.lt-freunde.de/forum/viewforum.php?f=26&sid=4334973a8cd3fc5e0b429f1dc20e3dbf" rel="nofollow - LT-Freunde Continued good wishes. ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: Canada LT28
Date Posted: 01 Dec 13 at 00:09
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Sprechen sie deutsche, LT? ------------- 94 LT28 Doka 2.4D Slow and built to stay that way 87 T3 soon to be a camper |
Posted By: LTCamper89
Date Posted: 01 Dec 13 at 07:04
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Not likely, just use the pictures and the descriptions to figure out what is meant. The translations are not always that coherent anyway, but getting better at it. ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: AndyT
Date Posted: 02 Dec 13 at 16:52
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These engines are really simple, my guess is that it's almost certainly spark related, a new coil is around 15UKP, king lead 3UKP. If I was travelling any distance I'd take them with me. The other possibility is an air leak, on either the manifold or the carb, but I wouldn't take the garages word for either. The 4 pot engine is very reliable but not economical, expect around 15mpg. LT's are excellent value for money but petrol engines need converting to lpg if you plan to go touring. When I bought my old bus I changed the coil, points etc and have never had a problem since. Not sure about the carb you mention, but there is an issue with getting them converted to LT's, just not enough carb bodies around anymore to modify. Personally I wouldn't spend any money on the carb, I'd just make sure there were no air leaks on the existing carb and spend the money on an lpg conversion. Hope this helps, shame you aren't local so we could swap parts. ------------- LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k  |
Posted By: Widar
Date Posted: 29 Jan 14 at 06:51
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Quick update here - we bought it. And since it's 270km from home i ordered a carb service kit to the shop and had them change it. Now it runs but they found several modifications inside the carb, drilled holes etc so they've had huge problems setting it up and can't get the exhause values legal. So now i'm in the hunt for a replacement carb. I found a new Pierburg 1B1 for VW LT ( http://www.ebay.de/itm/251400698881?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 ) But with my luck it got sold 2 hours before i could get it. So.. Now after the holidays I'm back for looking for another one and realized the same seller has another Pierburg 1B1 in stock, but that this one is for Passat. I've asked the seller if this carb would fit VW LT but all they said is that Pierburg says it's for 55HP and not 75HP. What do you think? Would this work for my LT? What would i need to change / replace from the old carburettor? http://www.ebay.de/itm/191043564196?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 Or would i be better of looking for something else? Thanks! Widar
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Posted By: Canada LT28
Date Posted: 30 Jan 14 at 00:28
Ohh, BTW, welcome to the wide wonderful world of the LT (and VW in general). You will become a good mechanic yet. ------------- 94 LT28 Doka 2.4D Slow and built to stay that way 87 T3 soon to be a camper |
Posted By: AndyT
Date Posted: 31 Jan 14 at 17:19
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I've advised what I'd do mate, don't know how much you have spent and you still have a problem. Almost any Pierburg you find will need to be modified in an engineering shop to fit at extra cost, it's been done by someone on the forum and I think it cost £160. You could convert to a manual choke like mine (Weber 34ich I think), again trouble is finding one. They used to be fitted to Landrovers and Bedford vans, the base which bolts to the manifold is the same shape as the LT's, as is engine size. You would need to re-jet though as required at around £3 each from Weber. ------------- LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k |
Posted By: Widar
Date Posted: 16 Feb 14 at 11:04
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Hey again! Thanks for the input and welcomes. :) Yesterday we finally got the LT home! Such a yoy to drive, I'm really looking forward to the big road trip this summer! No hurry., the huge hill an hour from here, ~20mph, second gear. :) The shop managed to modify and setup the carburettor even due to all the previous modifications on it, abling us to drive it home. It runs clean (on all four cylinders without missfire) when the choke is at a certain amount... Move it a mm any way and it missfires. They urged me to change the carb into something else. Maybe I'll get something completely different and fit it with an adaptor plate, I'd be able to make one at work. But at least it's now driveable (~270 km yesterday). The shop found that there has been more modifications to it probably with the aim of gett more hp. They suspect tuning cam shaft and there is a higher grade "tuning coil"(?) on it. I will get new, ignition things and change, but i still think that the modified carburettor is the source of the problems since it's running fine when it gets the right amount of fuel. Now the hunt for spares start, will check all the forum links! Picture: http://imgur.com/H5maN2M" rel="nofollow - http://imgur.com/H5maN2M |
Posted By: volition82
Date Posted: 16 Feb 14 at 14:16
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I found this company to be very good http://www.carburettorspecialists.com" rel="nofollow - http://www.carburettorspecialists.com I got my replacement carb (weber) from them. I had a 2E3 before so not the same as yours. They do loads of spares so they might do a re-build kit or maybe a replacement weber. That's if you can't find anything a bit near to you. You might find this thread interesting http://brick-yard.co.uk/forum/topic77614.html" rel="nofollow - http://brick-yard.co.uk/forum/topic77614.html I know it's about the newer 2E3 carb and not yours but it contains a lot of information about the pro's and con's of a re-build or a Weber. ------------- 1989 LT35 - 2.4 Lpg/Petrol - Converted To Camper |
Posted By: Widar
Date Posted: 17 Feb 14 at 08:17
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Thanks! Contacted carburettor hospital; "I WOULD SUGGEST A WEBER CONVERSION............£285.00+ No luck with original parts there. Thanks for the thread link, great read. That really made me want original parts, looks like a conversion will be too much problems. Just gotta keep looking i presume... Wonder if the carburettor body is the same on all Pierburg 1B1's, then it would be possible to build one working out of two spares.
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Posted By: Widar
Date Posted: 25 Apr 14 at 16:26
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Update here, i found another new Pierburg 1b1 on ebay, this time i got it. :) While changing other bits to new ones I took some pictures today of what the current one looks like. http://imgur.com/a/frTnl" rel="nofollow - http://imgur.com/a/frTnl Where should the plugged (vacuum?) hoses go? Tried searching the forums, google, and checked the Haynes manual but i couldn't find what i looked for. Any ideas to point me in the right direction? Thanks |
Posted By: Uberhare
Date Posted: 26 Apr 14 at 21:45
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You should replace any of those rubber hoses that are cracked. Fire hazard if the fuel ones start to leak! |
Posted By: Widar
Date Posted: 27 Apr 14 at 08:43
| Thanks, and yes off course - i will replace all hoses when putting the new carb on. But that still doesn't solve the problem for me - i have to find out where they all should go! :) |
Posted By: AndyT
Date Posted: 27 Apr 14 at 10:17
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You could have a look at the technical manual. ------------- LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k |
Posted By: Widar
Date Posted: 15 May 14 at 09:02
| I looked in the haynes manual and on all the tec manuals i could find linked here, still no help. :/ |
Posted By: LTCamper89
Date Posted: 15 May 14 at 09:26
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?Have you used the Image search rather than Web? http://https://www.google.co.uk/search?q=Pierburg+1b1&rlz=1C1CHFX_en-GBGB435GB435&tbm=isch&tbo=u&source=univ&sa=X&ei=-Hh0U9GVDs-S0QXAp4DwDg&ved=0CC0QsAQ&biw=1920&bih=985" rel="nofollow - http://https://www.google.co.uk/search?q=Pierburg+1b1&rlz=1C1CHFX_en-GBGB435GB435&tbm=isch&tbo=u&source=univ&sa=X&ei=-Hh0U9GVDs-S0QXAp4DwDg&ved=0CC0QsAQ&biw=1920&bih=985 I find that quite often there are images which have links to information the websearch did not throw up, or it was so far down the list of pages. ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: LTCamper89
Date Posted: 15 May 14 at 09:29
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http://www.ruddies.business.t-online.de/ti179.htm" rel="nofollow - http://www.ruddies.business.t-online.de/ti179.htm
------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: AndyT
Date Posted: 15 May 14 at 09:48
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The manual is there, trust me cos I uploaded it ages ago and checked before I replied. Same carb fits LT's and Passat using different jets. Edit:- Just checked now to be sure LT Manuals - Petrol leads to Engine and Carb manuals. ------------- LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k |
Posted By: volition82
Date Posted: 16 May 14 at 10:13
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I had the same problem with mine when I had the old carb on As mine is the new carb can't help other than I eventually worked it out by looking through the manual at all the different diagrams and pictures. Also Google images helped. I can't remember anyone who has the 2.0l other than Andy who now has a Weber. Perhaps you could pm him and ask if he knows of any other member's with one who might be able to help? You would think Haynes would have a flow diagram of it. Good books, but typically it never seems to have what you need! ------------- 1989 LT35 - 2.4 Lpg/Petrol - Converted To Camper |
Posted By: Widar
Date Posted: 16 May 14 at 16:20
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AndyT; Thanks for all the replies, i will have another check in the manuals - maybe i overlooked it. LTCamper89; I did try several google searches before asking here, i always turn to forums as a last resort. But thanks! :) Edit: Was too fast with the reply.
That's exactly what i looked for! Now i just gotta get working on that german. :D Thanks! |
Posted By: LTCamper89
Date Posted: 16 May 14 at 17:45
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German is easy, they just add words together to make new ones I am sure it will be better than my Swedish.  https://www.youtube.com/watch?v=RhRkAzaDuygDid not embed
 ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: Widar
Date Posted: 17 May 14 at 16:59
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Haha! :D To go even further off topic;
We do the same in swedish. Put words together and voilá - this means something completely different! Not entirely true, but the other way around, if you mean something and don't connect the words, it can be hilarious. For example; "Giftorm" = poisionous snake "Gift orm" = married snake. And yeah, we have the same word for marriage and poison over here. :) |
Posted By: LTCamper89
Date Posted: 17 May 14 at 17:01
 en Francais aussi------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: Widar
Date Posted: 01 Jun 14 at 12:31
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First, please bare with my lacking in english mechanical terms... Since how hard we tried we couldn't find the ignition timing marker on the flywheel trough the hole in the gearbox bellhousing we had to resort to basic or "default" (+5 degrees said Haynes) setup and then did rolling ignition calibration on the road with my friend sitting behind the front seat and adjusting the distributor cap to make it run as smooth as possible. It runs best with a bit more pre-ignition than the basic setup. (?) Problems with stuttering on lower rpms with half throttle still persists, but now it doesn't need to have choke applied to even run... When a small amount of choke, small enough to only close the air inlet a bit, is applied it runs better and the stuttering stops, but higher rpm power is reduced. My thoughts are still with the carburettor 1, being incorrectly adjusted, since it was adjusted with the timing off... or 2, that it still needs to be replaced. Any thoughts? It seems strange that it runs best on more pre-ignition, anything related to the 2.0 litre? And are there any ways to set the carburettor in "default", unadjusted, mode and see if it runs better? Thanks, Widar |
Posted By: Widar
Date Posted: 06 Jul 14 at 21:13
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Now the new carburettor is fitted and it fially runs like a charm! It took a while to figure out that the new carb had an solenoid idle cutter thingy that needed +12V for opening! Now time for fine tuning and setup and also another look at the ignition setting. I'm so glad that i got it all back and that it runs as smooth as it does! No choke needed to run anymore :)
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Posted By: LTCamper89
Date Posted: 06 Jul 14 at 21:28
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Good news. ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: timaldiss
Date Posted: 06 Jul 14 at 21:59
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Yeah that's cracking news. Good diagnosis I'd say! ------------- ------- I have a history of VW LT camper van addiction: http://campervanman.co.uk/" rel="nofollow - http://campervanman.co.uk |
Posted By: Widar
Date Posted: 21 Aug 14 at 06:09
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And now were back from portugal. :) Almost 8000 kms later! |
Posted By: LTCamper89
Date Posted: 21 Aug 14 at 08:29
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Must work well then. ------------- 1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music VW LT Camper not Cramper ....at least the roof is not rusting away.... |
Posted By: Widar
Date Posted: 15 Jan 18 at 10:20
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Hi fellow LT'ans! Back trying to fix her again. I'm trying to sort out a broken vacuum pipe t-piece and started wondering if i ever got the vacuum hoses correct before. Does anyone know what the "damper" nr1 here does? http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/LT/year/1982/drive_standart/30/hg_ug/129/subcategory/36030/part_id/3687193/lang/e" rel="nofollow - http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/LT/year/1982/drive_standart/30/hg_ug/129/subcategory/36030/part_id/3687193/lang/e I don't have it on my LT...?
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Posted By: Dreamcatcher
Date Posted: 15 Jan 18 at 12:06
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It's the vacuum operated valve that diverts hot hair from around the exhaust manifold to the air intake. ------------- Dave 1991 LT31 Camper |
Posted By: Widar
Date Posted: 15 Jan 18 at 12:36
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Thanks! But.. that doesn't help me. Dunno if it's the english or that it's monday. I just can't get my head around why it's needed. Why is a vacuum valve needed to divert air? Care to explain like I'm 5?
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Posted By: Dreamcatcher
Date Posted: 15 Jan 18 at 17:02
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I was thinking that this was part of the fast heat up system, my mistake! ------------- Dave 1991 LT31 Camper |
Posted By: Widar
Date Posted: 16 Jan 18 at 05:10
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Haha, no worries! You almost had me! I double checked and i do not have this "damper" mounted on my car. On my old carburettor the vacuum hose was just plugged and when i put on the new carburettor all the hoses where connected together with the t-coupling. http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/LT/year/1982/drive_standart/30/hg_ug/129/subcategory/36030/part_id/3687193/lang/e" rel="nofollow - http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/LT/year/1982/drive_standart/30/hg_ug/129/subcategory/36030/part_id/3687193/lang/e 4 and the two 6 connected with 7. And it ran... but the t-coupling broke so that's when i started looking up where they should go since i thought it looked strange.
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Posted By: Dreamcatcher
Date Posted: 16 Jan 18 at 10:29
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Glad you got it sorted! ------------- Dave 1991 LT31 Camper |
Posted By: Widar
Date Posted: 17 Jan 18 at 07:54
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I haven't. The carburetor has been on there for almost four years and i still dunno how the vacuum should be connected. |
Posted By: AndyT
Date Posted: 17 Jan 18 at 12:28
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Have you checked Workshop Manuals ------------- LT28 1979 2.0 Pampas Nevada Camper LPG 93K, 1980 T3 A/C Camper 98K,1994 RRC 3.9 LPG 120k , 1998 Audi A6 Est 2.5 V6 diesel 127k |
Posted By: Widar
Date Posted: 18 Jan 18 at 05:04
| Andy, Yes. Including Haynes. |
Posted By: ottoMan
Date Posted: 24 Jan 18 at 13:57
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Now I found your post ! Sorry my carburetor was no help from you. The way I figure it out - after reading your story here - is that you have more vacuum hoses on the carb than vacuum ports to go to. The the only vacuum you'll need is the one that goes into the distributor. The other hoses are not used, if you don't have that damper on the air intake - I don't have it either. Just plug those hoses so that it doesn't draw air and that's it - as far as I understand that's how it worked until now and it worked great. PS - my LT has been through Portugal for nine months or so. Sorry I missed you there. :) ------------- 1980 Pop Top LT28 2.0 Petrol converted by Karroseriefabrik Voll von Wurzburg |
Posted By: Widar
Date Posted: 25 Jan 18 at 12:10
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Hey Ottoman! Thanks, I'll plug them and give it another try! Edit: On http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/LT/year/1982/drive_standart/30/hg_ug/129/subcategory/36010/part_id/3691433/lang/e#sec_1A" rel="nofollow - http://www.oemepc.com/vw/part_single/catalog/vw/markt/RDW/modell/LT/year/1982/drive_standart/30/hg_ug/129/subcategory/36010/part_id/3691433/lang/e#sec_1A It's visable what this vacuum connection goes, into the 1A "Pulldown Socket". Is this needed in some way for the fuel to flow? I'm having a hard time reading the technicals manuals on what this Pulldown socket actually does. Any ideas? Edit2: Found this at Ruddes; http://www.ruddies-berlin.de/Ti141_1B3.html
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Posted By: ottoMan
Date Posted: 26 Feb 18 at 13:05
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I think that pulldown socket actuates the cold start butterfly - the butterfly is closed for cold starting, after the engine is started and is reved, the vacuum pulls the butterfly through the pulldown socket, to open it and allow more air to pass. Anyway, you need a vacuum hose connected to it, which I imagine it was, since the engine was running fine. The above explanation is based on what I can figure out from the parts diagram, unfortunately I don't know German, so I don't understand the document on the ruddies site. ------------- 1980 Pop Top LT28 2.0 Petrol converted by Karroseriefabrik Voll von Wurzburg |