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Author corsa 1.4 16v sport compression??
joebickerton
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Registered: 17th Jan 11
Location: kent
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14th Mar 11 at 18:31   View User's Profile U2U Member Reply With Quote
hi people ive got a 1996 corsa b sport 1.4 16 ecotec its been smoking and has gunk in the oil cap so i bought it with a suspected headgasket failure i did a compression test and each one of 4 hit between 50-75 . once the head gasket is done what compression should i expect it to hit/?? cheers
joebickerton
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14th Mar 11 at 19:59   View User's Profile U2U Member Reply With Quote
?????????????
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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14th Mar 11 at 21:16   View User's Profile U2U Member Reply With Quote
180psi +
joebickerton
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Registered: 17th Jan 11
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14th Mar 11 at 21:22   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Scotty C
180psi +


in each one?? or all 4 bores together???
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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14th Mar 11 at 21:54   View User's Profile U2U Member Reply With Quote
Each one.
joebickerton
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Registered: 17th Jan 11
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14th Mar 11 at 22:02   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Scotty C
Each one.
its only doing 75max at the moment =[ is that usual considering hg is going.
AlexW
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Registered: 25th Oct 08
Location: Essex
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14th Mar 11 at 22:19   View User's Profile U2U Member Reply With Quote
Put a bit of oil down the plug holes, then do another compression test, if it goes up, piston rings have gone aswell, Deffo worth doing!
joebickerton
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14th Mar 11 at 22:23   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by AW06
Put a bit of oil down the plug holes, then do another compression test, if it goes up, piston rings have gone aswell, Deffo worth doing!


i poored water on the 4 cylinders to see if it leaked through but stayed same level and no movement in the bore so they seem alright its all stripped for a new headgasket at the moment
redtom
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Registered: 6th Oct 07
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14th Mar 11 at 22:25   View User's Profile U2U Member Reply With Quote
WHAT
joebickerton
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14th Mar 11 at 22:29   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by redtom
WHAT

????
AlexW
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Registered: 25th Oct 08
Location: Essex
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14th Mar 11 at 22:32   View User's Profile U2U Member Reply With Quote
STEP AWAY FROM THE ENGINE
joebickerton
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14th Mar 11 at 22:35   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by AW06
STEP AWAY FROM THE ENGINE


haha it wasnt actually me who did it my friend lol it didnt leak anything anyway just wondered if it would lose alot of compression with the headgasket going.
redtom
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Registered: 6th Oct 07
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14th Mar 11 at 22:40   View User's Profile U2U Member Reply With Quote
id probably tell him to back away from anything mechanical.

lack of compression across all 4 is more likely to be valves/rings worn (and if they are that low they will be knackered)
joebickerton
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14th Mar 11 at 22:43   View User's Profile U2U Member Reply With Quote
before i took head off tho it was just getting hot quickly and gunk creamy shit in the oil no missfiring no power loss pulled like a train. i just wanted to know if the compression would be affected with the headgasket failing???
redtom
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Registered: 6th Oct 07
Location: Kent
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14th Mar 11 at 22:45   View User's Profile U2U Member Reply With Quote
Yes but not normally across all 4.
joebickerton
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14th Mar 11 at 22:48   View User's Profile U2U Member Reply With Quote
on one its not reading anything but others its between 50-75 with plugs out that is.
joebickerton
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14th Mar 11 at 22:59   View User's Profile U2U Member Reply With Quote
what im saying is the first person said compression should be 180plus with all plugs out and gunky shit in the oil i checked the piston rings and no liquid is going past them rings so there fine and no movement from the boor inside.i just wanted to know if the compression of 50-75 is common when the hg is buggered and im hopeing once its all fixed it should go over 180???
joebickerton
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Registered: 17th Jan 11
Location: kent
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15th Mar 11 at 00:22   View User's Profile U2U Member Reply With Quote
anymore info welcome like i said theres no movement from the piston side to side or up and down in the bore no power loss before i took head off just some smoke and cremey shit on dipstick and on oil cap pored liquid into the bore and it didnt seep down the side of the pistons any of them so they seem alright?? i suspect its the headgasket did a compression test before i took head off with engine cold it read 50-75 on them all with one not reading anything. any info welcome on what u think

 
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