my gsi picked up an annoying problem yesterday, driving along and power would be cut for about half a second (ish) and then it'll pick up again. its a random problem, it will be fine for 5 miles then do it, then 10miles and do it etc. no fault codes so i was thinking either fuel problem or ignition, so i whipped the plugs out today and no's 1 and 2 were quite badly covered with fresh oil, and oil can be seen on the piston crowns, no 3 is not so bad and no4 is almost dry. now, i've long suspected that either the head gasket is going or the head is porous, would this cause the symptons or is it a bottom end problem such as rings? is a rebuild in order?this lump has already sold provisionally and the buyer is aware of the potential prob with the head, and was contemplating a full rebuild anyway so i'd like to know whats up with it as i dont want to pass it on without letting the guy know whats up with it as it is a friend of mine.
Last edited by phat SR; 30-07-2004 at 13:07.
Reason: error in technical data lol
if the head gasket was gone, is it likely to go right across the block? The head gasket i blew on my golf 1.3GL (POS) only went between 2 cylinders and i didn't get any oil or water getting into the bores unless yours has blown by the oil ways. Could it be rings going/gone?
a porous head will not give those symptoms - only oil in the coolant.
sounds like HG or rings tbh. Though it'll be hard to tell from simple diagnostics as it'll be burning oil regardless.
a wet/dry CT is in order - the HG will not affect the difference in the readings you're looking for, which is a tell tale sign of rings, and how well worn they are - the problem you'll have of course is getting it dry in the first place.
if the oil contamination comes and goes though, HG is more suspect imo.