Help low compression
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Help low compression
i got 98 civic coupe with ls swap cylinder 1, 2, 4 compression is at around 160- 170 and cylinder 3 is at or below 50 psi, what can cause this low compression and i idles low ans sounds like its gonna die
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Re: Help low compression (zc89hatch)
ok i was thinking if i have a bad piston ring then i should be burning oil
so it should be the valves right
is this correct or no
so it should be the valves right
is this correct or no
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well a compression test will only show so little i would recommend getting a leak-down test performed on your motor to make sure its rings or not but you can also try this pour a SMALL amount of oil down in cylinder 3 since in your case is the "bad" cylinder if this changes compression it will show you which is bad rings or bent valves
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Re: (zc89hatch)
ok i got codes 71 72 73 74 which is mis fire in all the cylinders and was wondering if it has anything to do with the 50 psi in cylinder 3 and the rest around 160 and 165
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Re: (zc89hatch)
solve my problem. One of my intake valve was crack thats y i was losing compression and thats y it was throwing those engine codes. thanks for all the help
#11
Re: Help low compression (zc89hatch)
Hi,
I may have the same problem as you, Cyl no. 2 compression is very weak 70 to 80 psi compared to the rest 180 - 190. I know its not the rings " did the oil trick" I think it could be either head gasket or a valve may be cracked or burnt.
My question to you is this:
Were you able to change the one valve or did you have to do a complete valve job?
I may have the same problem as you, Cyl no. 2 compression is very weak 70 to 80 psi compared to the rest 180 - 190. I know its not the rings " did the oil trick" I think it could be either head gasket or a valve may be cracked or burnt.
My question to you is this:
Were you able to change the one valve or did you have to do a complete valve job?
#12
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Hi,
I may have the same problem as you, Cyl no. 2 compression is very weak 70 to 80 psi compared to the rest 180 - 190. I know its not the rings " did the oil trick" I think it could be either head gasket or a valve may be cracked or burnt.
My question to you is this:
Were you able to change the one valve or did you have to do a complete valve job?
I may have the same problem as you, Cyl no. 2 compression is very weak 70 to 80 psi compared to the rest 180 - 190. I know its not the rings " did the oil trick" I think it could be either head gasket or a valve may be cracked or burnt.
My question to you is this:
Were you able to change the one valve or did you have to do a complete valve job?
#14
Re: Help low compression
found one valve bent and caused deformation in the seat in the head. thankfully is did not cause damage to the piston. I did have to get another head sine the original one could not be re-seated.
Got it all put together purrs like a kitten
Thanks for all your help
Got it all put together purrs like a kitten
Thanks for all your help
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