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Author compression test results
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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15th Mar 04 at 19:21   View User's Profile U2U Member Reply With Quote
after receiving advice here -

http://www.corsasport.co.uk/board/viewthread.php?tid=129400

i did a compression test today,

cyl 1 - 14 bar
cyl 2 - 11.5 bar
cyl 3 - 0.5 bar
cly 4 - 0 bar

put some oil in 3 & 4 and got same results so that means the head gasket is shot between those cylinders yes?

The other thing is cyl 1, why is it so high? according to Haynes manual its supposed to be around 10-11 bar

Thanks
Adam-D
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Registered: 11th May 02
Location: Cheshire
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15th Mar 04 at 19:24   View User's Profile U2U Member Reply With Quote
next up is to take the head off to see
AdamF
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Registered: 24th Apr 02
Location: Bexhill, East Sussex
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15th Mar 04 at 19:24   View Garage View User's Profile U2U Member Reply With Quote
could also be valves but i did read you were getting oil in there so maybe not. take head off and see you will have to at some point anyway
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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15th Mar 04 at 19:39   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Adam_B
The other thing is cyl 1, why is it so high? according to Haynes manual its supposed to be around 10-11 bar
jr
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Registered: 20th May 02
Location: Kent
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15th Mar 04 at 19:40   View User's Profile U2U Member Reply With Quote
ask on mig adam, sure to get a response there
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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15th Mar 04 at 20:02   View User's Profile U2U Member Reply With Quote
Whatever it is you have to take the head off anyway. That'll tell you whats wrong. Normally on mine it's 16 bent valves and pistons with holes in
Tim
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Registered: 21st Apr 00
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15th Mar 04 at 20:13   View Garage View User's Profile U2U Member Reply With Quote
You didn't just over-crank it when doing cylinder 1 or something?
jr
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Registered: 20th May 02
Location: Kent
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15th Mar 04 at 20:14   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Keith Piper
Whatever it is you have to take the head off anyway. That'll tell you whats wrong. Normally on mine it's 16 bent valves and pistons with holes in


Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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15th Mar 04 at 20:17   View User's Profile U2U Member Reply With Quote
Dont believe me I'll stick some pics up!
jr
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Registered: 20th May 02
Location: Kent
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15th Mar 04 at 20:19   View User's Profile U2U Member Reply With Quote
no i do thats the problem

how deppresing must it be when you take the head off to see that

[Edited on 15-03-2004 by jr]
vibrio
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Registered: 28th Feb 01
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15th Mar 04 at 20:47   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Adam_B
after receiving advice here -

http://www.corsasport.co.uk/board/viewthread.php?tid=129400

i did a compression test today,

cyl 1 - 14 bar
cyl 2 - 11.5 bar
cyl 3 - 0.5 bar
cly 4 - 0 bar

put some oil in 3 & 4 and got same results so that means the head gasket is shot between those cylinders yes?

The other thing is cyl 1, why is it so high? according to Haynes manual its supposed to be around 10-11 bar

Thanks


oil in the cylinder to repair compression means your piston rings are probably shot to buggery
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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15th Mar 04 at 21:04   View User's Profile U2U Member Reply With Quote
it didnt make any difference when i putthe oil in
vibrio
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Registered: 28th Feb 01
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15th Mar 04 at 21:56   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Adam_B
it didnt make any difference when i putthe oil in




could not read lol. maybe you got a big hole. I don;t think you'd have complete loss of compresison with a head gasket blowing. maybe valve problem
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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15th Mar 04 at 21:58   View User's Profile U2U Member Reply With Quote
I reckon it valves. Its unlikely to be the gasket as the readings would be higher
PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
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15th Mar 04 at 22:01   View User's Profile U2U Member Reply With Quote
I had a gasket go between no. 3&4 cyl on my corsa, there was no compression at all on those two. but the hole in the gasket between the cylinders was about an inch big!
Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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15th Mar 04 at 22:08   View User's Profile U2U Member Reply With Quote
lol, i just replied to this post on mig web, wip the head off ya got to do it any way, hope its only a gasket breach between cylinders
Keith Piper
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Registered: 10th Apr 02
Location: West Sussex
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15th Mar 04 at 22:38   View User's Profile U2U Member Reply With Quote
Thats wot I said an hour and a half ago!
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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16th Mar 04 at 10:46   View User's Profile U2U Member Reply With Quote
skimming the head, whats involved and roughly how much does it cost?
Adam-D
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Registered: 11th May 02
Location: Cheshire
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16th Mar 04 at 10:47   View User's Profile U2U Member Reply With Quote
if its only just gone i wouldnt bother
just make sure the head faces are clean and re-fit with new gasket
Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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16th Mar 04 at 11:10   View User's Profile U2U Member Reply With Quote
just run a feeler blade over the head to check its nice and true or the straight edge of a metal ruler, and just look for and warping, like he said you should be ok unless the gasses rushing between cylinders have damaged the head

 
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