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Compression Test Results, not good- any ideas?

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Old 03 May 2005 | 07:32 PM
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Scoob+Bike=Fun's Avatar
Scoob+Bike=Fun
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Default Compression Test Results, not good- any ideas?

well, after doing a C/T, results are as follows, not sure if my cyl numbers are right, 1 is front left, 2 back left 3 front right and 4 rear right as you look under the bonnet. Not a happy bunny!

1. 108
2. 88
3. 88
4. 62

now, i'm no genius, but this isnt right, not checked the cam timing yet, so that could be a possibility???? could it? I hope so! so everyone...am I looking at another engine rebuild (just had this one done 1700miles ago)

please help!

p.s. didnt disconnect the injectors so could fuel in the C/tester do this, also results on closed throttle

Adam

Edited to add: 2.5 conversion with STI RA v2 heads
post is related to http://bbs.scoobynet.co.uk/showthread.php?t=423001

Last edited by Scoob+Bike=Fun; 03 May 2005 at 07:35 PM.
Old 03 May 2005 | 07:39 PM
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From: 32 cylinders and many cats
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Engine hot, wide open throttle, injectors disconnected/disabled is the usual, so I think your results are invalid.
Old 03 May 2005 | 07:50 PM
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erm, it wont start, so I cant do it hot. Re did number 4 on fully open throttle, same result, will do the others later/tommorow and report.
Old 03 May 2005 | 08:20 PM
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How many times did you turn the engine over?

Just disconect the crank sensor for no fuel.

I did mine the other day for fun and got 170psi on all 4, ej257/sti3 heads/na ej25 headgaskets/ 12000k's.
Old 03 May 2005 | 09:52 PM
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Have you got the right cams in the right heads? As in, could the cams for the left head be in the right head?

Something is very wrong, especially if I am to assume the engine has never run.

Paul
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