teauxbee

Okay, So I'm new to the forum and for the past few days I've been research A TON. But I just can't seem to come to a final consensus.
I purchased a 90 240sx hatch about two months ago with a single cam ka (ka24e) and a blown headgasket. The headgasket was easily fixed with the time available and I also polished and ported the head/intakes/throttle body. After throwing the engine back together I checked my compression through all spark plugs and I'm running at around 105 lbs .
The general opinion I'm seeing is that I could be off on the timing chain by a mark (that's with timing the distributer as well) or my piston rings could be fried from the guy before me driving it too long with the bad headgasket.
I guess I'm just wondering, does this research seem accurate? Are these correct conclusions to come to? If the timing chain is off I can fix that very easily, but if its the piston rings, is my last resort a new engine?

Alamo_City_210

I think if you put a bit of oil in the spark plug holes prior to compression check, and if the psi is more, then you have bad rings. (correct me if im wrong) But why the new engine, just rebuild the one you have. buying a new(to you) engine is going to have its own problems.

teauxbee

Well, I figure at all costs a new engine would be the same price as if I just rid of the engine and bought a swap, Especially with the bit of money I have that could be uses for so. Ill try the oil squirt right now and see what goes on!

jr_ss

Run your engine until its warm. Then pull your fuel pump relay/fuse/what have you and do a comp test again. Keep the throttle open. Once you have a set of base numbers, add a cap full of oil to each cylinder(one at a time, so cap full the comp test and move on to the next cylinder and add a cap full, etc) and do a comp test again. If your numbers rise significantly, your rings are indeed shot. If there is no change, your issues lie somewhere else.

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