Ok I just bought an 2002 impala that the place I got it from seized the engine. We managed to un-Seize the engine and start it as soon as we did it leaked oil. Our 1st thought was it was the oil presure sending unit till we got up in the air. We noticed it had a swelled oil filter. So we took it off, and put a new one on. we started it up and it took that one out right away. What could cause this?
A seized engine and swelled oil filter? Could be heat. Could be they never changed the oil. Could be a lot of things. Honestly, I wouldn't trust an engine that's been seized though.
But at least do this:
Cut the top of the oil filter off, wash the contents of the oil filter into a clean coffee can (metal preferably) using mineral spirits and then run a magnet across the back to see how much ferrous metal is in there. the brass should be pretty obvious as well.
I know they changed the oil every 3k miles. I know the whole work history on the car didn't see anything out of the ordanary done to it. Like I said we put a 2nd oil filter on it as soon as we got it un-seized and put it in the air and noticed it was swelled and as soon as we turned the car on it too that on out same deal.
Never seen a oil filter swell.....although I have seen oil filter puke out oil after the filter was changed and the old o ring was still in place when the new filter was put on. Basically had 2 o rings on it at that point and sealed but puked as soon as it had rpms above idle.
That I've seen before as well. You'd have to push through a TON of pressure in the oil system to cause the filter to physically swell. Unless it got seriously hot.
Well, if the oil is flowing into the filter but not flowing out, that would do it. The problem I would guess is clogged oil passages somewhere, but the motor likely isn't worth salvaging.
it looks like the oil presure relese vavle is in the oil pump not in the oil filter asmbly we're going to drop the pan and check all the stuff we can from there and see how everything looks and if everything looks ok we're going to put a pump in it and go from there.
we replaced the oil pump in the car today hopeing all works out so far so good. It fixed the issue now it's just a matter of seeing if any issues pop up. it only took like 4 hrs to do.
Im a proffesional technicianand worked on lots of cars over many years and never seen that on any make or model. It is physically imposible for an oil pump to generate the kind of pressure necissary to blow up or rupture an oil filter. My guess is there is a head gasket or other means by which cylinder compression getting into an oil passage or into the crankcase. It goes without saying engine replacement is the way to go as they are reasonable and easy to find.
It seems like the oil pressure release valve broke in the oil pump. we replaced the oil pump and the issue went away so I don't know what to tell you other then it was the oil pump.
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