Losing coolant somewhere! |
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Vantasy
Not Quite Newbie Joined: 18 Jul 10 Location: Devon Status: Offline Points: 14 |
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Oh that's good. Moisture laden due to coolant boiling off and drawing water vapour in through the EGR inlet manifold I take it. I have asked them to change the oil and save a sample for me - does this warrant the filter too? They haven't and won't be taking it apart until the middle of next week, (commercial ramp schedule I'm told) should I ask them to look for a build up of sooty 'coke' in the manifold due to leaking coolant attracting this - if so might this stuff then have detached and possibly been drawn into the engine too, with unknown consequences?
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T5 TDI
Vanorak Joined: 05 Nov 05 Status: Offline Points: 3687 |
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Through the inlet manifold yes. I'm guessing it went in as water in drops and the vapouring came later. Luckily the water must have gone in in small quantities otherwise it can get get trapped in the combustion chamber (hydrolock) wrecking the engine which clearly hasn't happened in your case.
I don't think any coke will be a problem. If larger drops of water were cruising around in the oil itself though the turbo might suffer, but I think your gunge probably just formed from the excess vapour in the breathing system. Don't worry, just let them do their work and watch everything carefully afterwards for while.
There doesn't seem much point in them not changing the oil filter. If they argue offer to pay for it if necessary. Hope all goes well.
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2004 2.5 174
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T5 TDI
Vanorak Joined: 05 Nov 05 Status: Offline Points: 3687 |
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If you send me that pic of the cap I'll put it up. Be interesting to see how bad it is. I'll pm you my email.
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2004 2.5 174
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T5 TDI
Vanorak Joined: 05 Nov 05 Status: Offline Points: 3687 |
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This is the pic Vantasy sent me of the emulsified oil inside his oil filler cap. It's not ideal but it's not too bad. I think it fits well within the normal range. Similar to other vans that only did mostly short runs. Although short runs weren't the cause in this case it's nothing much to worry about on its own as long as the coolant loss is now fixed. Anyone else care to look at their cap and compare?
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2004 2.5 174
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Vantasy
Not Quite Newbie Joined: 18 Jul 10 Location: Devon Status: Offline Points: 14 |
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At long last the root cause of coolant loss has 'seemingly' been exposed! The EGR valve was today found to have a split seam allowing the slow ingress of coolant. EGR valve, oil and filter will now be changed and hopefully all fixed after nine weeks of investigation and over 500 miles of experimental test driving - I'll just be tentative and watch and wait.........and then relax and get back into camper mode!
Thanks for all the input into this topic - I hope it helps someone else trying to find out where their coolant is going.
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T5 TDI
Vanorak Joined: 05 Nov 05 Status: Offline Points: 3687 |
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Good news Re the EGRs for future info I believe all autos have the water cooled EGR valve and possibly all later vans (2008 on?) The EGR itself is different too being electrically operated as opposed to the vacuum operated earlier EGRs. The coolant pipes going to it give it away.
Thanks for letting us know Vantasy, many don't bother.
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2004 2.5 174
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energysolutions
Vanorak Joined: 02 Dec 08 Location: Earth (For Now) Status: Offline Points: 3684 |
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Another reason to banish EGR valves to the history books!
These things are there purely to please tree huggers and do not help a vehicle in any way
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!!Never Eat Yellow Snow!!
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stefan
Newbie Joined: 08 Oct 14 Status: Offline Points: 2 |
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Warming up your old thread here.
Just to clarify (as I too have a water leak on my T5 2.5 Auto): it wasn't the EGR valve that had the split, it was the EGR cooler, correct? Cheers Stefan |
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VW master-tech
Yardie Joined: 28 Aug 09 Location: bedfordshire Status: Offline Points: 407 |
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Best way to see if the cooler is leaking is to carry out a coolant system pressure test if pressure drop is seen remove the 2 coolant pipes join them together to keep the circuit complete and redo pressure test if no drop in pressure the cooler is your problem and you havent spent out money on a part
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VW WORX VCDS retrofitting and coding carried out, cruise control, mfsw, dis, locking adaptions pm for a quote
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stefan
Newbie Joined: 08 Oct 14 Status: Offline Points: 2 |
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Thanks, we already did that and the EGR cooler is not at fault. Pressure test is ok, exhaust test came back fine too.
I just wanted to make sure that I got this correct and it is the EGR cooler, not the valve, that was at fault in the original poster's case. My local garage (they turn over lots of cars and have generally got a good hunch) recommended taking a closer look at the water pump. I've booked it in to get it changed as the van has done nearly 80,000 miles and a water pump change won't hurt in any case. Heard many horror stories about them failing in the 2.5 TDI engine. Will keep you posted. Stumped so far as no signs of leaks, no oil in water, no water in oil, no white smoke, nada... Cheers Stefan |
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Alonline
Vanorak VW Customer Service Joined: 18 Apr 10 Location: Belfast Status: Offline Points: 2517 |
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The water pump in the T5 5 pot was a value adding feature for VW profits by fitting a utter piece of crap designed to fail.
What really pissed me off was car drivers got it done free and we get to pay to sort their sh1te!
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graceedoo
Newbie Joined: 11 Feb 16 Location: UK Status: Offline Points: 1 |
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Hello, the coolant light warning light came on on my 2006 1.9 T5 Transporter camper van conversion a coupe of weeks ago. Initial inspection revealed that the coolant expansion chamber was below minimum level. This should not happen as the system is a closed system. I topped the coolant up with approved coolant, not just water, and took the bus for a run. Yes the coolant warning light went off. The next day, the warning light came back on and popping the hood the level had dropped again. However, with no obvious signs of leaks or smells. Fearing the worst, a pressure check revealed and identified that the seal on the expansion bottle was at fault. Replaced the cap and coolant...problem solved...
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gregozedobe
Vanorak Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
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Excellent result
Is your 1.9 motor one of the (many) VW engines where you should replace the water pump as part of normal maintenance ? I know it is recommended for a lot of the 4 cyl engines (and a good idea for the T5 5cyl one as well).
Edited by gregozedobe - 12 Feb 16 at 02:01 |
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stinkyfinger1
Groupie Joined: 15 May 10 Location: denmark Status: Offline Points: 64 |
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Hi guys
I've a 2004 T5 2.5 tdi 130 horse. I've been down that route with continually topping up the expansion tank. Little did I know the wife got a warning and her brother being helpful, topped up the tank again, she watched this happening. So every time the warning appeared, she topped up, bless her 😀👍 . Anyway I work away from home, so when I was home and the warning came again, no problem she popped the bonnet and topped up, it was then I found out she had been doing this regularly 😡 after reading some of your blogs, decided to put it in for a new water pump. Picked up the bus and on the way home could only manage 50 kph down the motorway. Phoned the workshop and was told to bring it back in. He suggested that the main dealer have a look. It was then he mentioned that I should inform the dealer that there was a few litres of coolant came out with the engine oil. Anyway, turned out the turbo was shagged😱 Nearly £3000 in total for the water pump, new turbo and the oil changes. SO, be warned the 2.5 engines have a serious sickness. Engine never quite been the same since, less power and now a whiff of blue smoke upon start up. Sorry about the longish story, good reading and a happy new year to all of you T5 ers. |
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gregozedobe
Vanorak Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
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Seeing as yours is an early build 2.5 lump I'd be suspicious of cam/follower wear - this is a common problem with these, and any problems with lubrication (eg coolant in water. wrong spec oil) is only going to make it worse.
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stinkyfinger1
Groupie Joined: 15 May 10 Location: denmark Status: Offline Points: 64 |
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Yes, probably the beginning of the end. Prior to the water pump problem, the motor was a good un, small oil leak because of a botched repair but pulled like a train anyway.
Ah well just have to keep nursing it for as long as possible. |
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T5 TDI
Vanorak Joined: 05 Nov 05 Status: Offline Points: 3687 |
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I think you just have to think of 2.5 water pumps as you would a cam belt. Whatever the manual says, after 50k- start gently sweating. After 80k start really worrying. Any more than that, start praying!
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2004 2.5 174
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gregozedobe
Vanorak Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
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Yeah, after 167,000km on mine I've been praying (and crossing all fingers and toes), but I also monitor the coolant level and oil levels and oil filler cap VERY closely. I'm intending to replace the water pump at 180,000Km along with the gates couplings and quite a few other "sort-of" wear/service items on the engine.
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T5 TDI
Vanorak Joined: 05 Nov 05 Status: Offline Points: 3687 |
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I changed mine first at around 40,000 miles. It wasn't leaking but I didn't want to take any chances. But now I'm just over 100k. I keep a close eye on the coolant level too but I think I will change it again because of the miles and the thought of the bearings getting slack but not actually causing the seal to leak.
I've seen that many times on standard pumps but only once on our gear driven ones. When I change it I'l report back. |
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2004 2.5 174
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festa
Groupie Joined: 23 Dec 11 Location: some where Status: Offline Points: 107 |
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Mines on 220k and haven't bothered with the pump as if it's not broken then don't fix it, but then I tiptoe close to the edge. I have had water loss lately but that's cos the head has jumped and the head gasket is leaking into cylinder 5 between 4/5 as it's narrow there.
If the engine oil gets hot enough any water in the oil will evaporate anyway and water in the bore will get burnt off. I only know mines leaking into the bore because of the pitting on the head around the combustion chamber...Something to do with the antifreeze. |
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lwb 174,Wagner intercooler, rosten rods, balanced bottom end, GT2262v hybrid turbo, 2.7bar boost with full ss 76mm decat exhaust, itg filter, 440ft lbs@288bhp
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