Hey guys need advice have a 02 1.8 laguna only building about 7 bar compression a cylinder 1 and about 13 bar in the rest.Put some oil in and brought it up to about 8 bar if even that.Am suspecting a burned exhaust valve maybe but am not pushed on taking the head off as the customer refuses to believe such a new car(5 years old ha)can have such a problem and isnt to big on spending some cash so any advice welcome thanks...
2007-09-11 10:27:57 · 2 answers · asked by shane 1 in Cars & Transportation ➔ Car Makes ➔ Renault
Try a cylinder leakdown test. Compressed air @ ~100 psi is let into the cylinder at TDC firing. This will tell you where the leak is. Chances are it is a valve issue considering that the compression only increased by a minimal amount after a test w/oil. If the air ecapes to the cooling system, its a head gasket/cracked head. If it escapes to the exhaust its an exhaust valve, air rushing out the intake is an inake vlave. If air were to blow out of the engine at the oil filler cap or the dipstick this indicates a ring issue.
2007-09-11 12:57:00 · answer #1 · answered by chewyatnc 1 · 0⤊ 0⤋
I don't think oil would increase compression with a bad valve. I would suspect a head gasket. Look a little closer.
2007-09-11 18:17:37 · answer #2 · answered by tronary 7 · 0⤊ 0⤋