Compression test since head rebuild

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SuperRedMR2
Posts: 5494
Joined: Mon May 16, 2005 8:40 pm
Location: Wickford, Essex

Compression test since head rebuild

Post by SuperRedMR2 »

Hi,

I compression tested the engine today since the head has been rebuilt.

Cylinders 2, 3 & 4 155-160

Cylinder 1 was 125-130 psi - with a drop of oil it brought it back up to 155 psi

Also, the cambelt wants to work itself off of the cam pulleys - any ideas?
gnzyza
Posts: 1300
Joined: Wed Jun 27, 2007 11:39 am
Location: Gloucester

Re: Compression test since head rebuild

Post by gnzyza »

Adding oil and results increasing indicates rings, next step would be a leak down test to pinpoint the leak for definate
SuperRedMR2
Posts: 5494
Joined: Mon May 16, 2005 8:40 pm
Location: Wickford, Essex

Re: Compression test since head rebuild

Post by SuperRedMR2 »

Seems a faulty reading on the compression tester was the issue.

As they are all at 160-170 now.
SonicSW20
Posts: 3681
Joined: Mon Nov 29, 2010 7:54 pm

Re: Compression test since head rebuild

Post by SonicSW20 »

The compression tester probably wasn't quite seated properly or something. If you were able to produce a repeatable 160-170 across all 4 then you're all good :)
elbon50
Posts: 3598
Joined: Sat Sep 12, 2009 10:29 am
Location: Stafford

Re: Compression test since head rebuild

Post by elbon50 »

I had a similar problem

My old tester is one with a rubber cone

I now have a new tester which screws into the sparkplug hole

Much better :thumleft:
Peter

1989 MR2 Mk1 NA T-bar
1998 Ssangyong Korando GLS
2011 Honda Civic Type R
SuperRedMR2
Posts: 5494
Joined: Mon May 16, 2005 8:40 pm
Location: Wickford, Essex

Re: Compression test since head rebuild

Post by SuperRedMR2 »

I have the one that screws into the hole as well Peter.

Must have been some crap in the plughole thread.

Still made me want to cry though the first time around.
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