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T5 engine conversion 2.5 to 1.9

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rob1927 View Drop Down
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Joined: 15 Nov 11
Location: Bolton
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rob1927 Quote  Post ReplyReply Direct Link To This Post Topic: T5 engine conversion 2.5 to 1.9
    Posted: 06 Oct 21 at 20:27
Hello everyone. 

My 54 plate T5 looks like it’s engine needs replacing, it currently has a 2.5 axd engine that is goosed. The gearbox is 6 speed automatic. 

I’m looking to replace the 2.5 engine with a 1.9 


Will a 1.9 engine work with the existing 6 speed automatic gearbox?

Is it a straight swap?

Are any conversion parts needed?

Many thanks,


Rob. 
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Idris View Drop Down
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Joined: 28 Jan 10
Location: Chamonix France
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Idris Quote  Post ReplyReply Direct Link To This Post Posted: 13 Oct 21 at 11:44
From what I know (I own a 1.9 and I've worked of friends 2.5's).

Not a straight swap. Different for most things.

Hopefully somone else will be along on the bellhousing - AFAIK the 2.5s are different to the 1.9's but the 2.0 (T5.1 etc.) is the same as the 1.9.

Engine mounts are different. 

You will need the ECU and engine harness from the 1.9 at the very least.

Unless the 1.9 is remapped it will be slow compared to the 2.5 by quite some margin.

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