Question: I am having a problem with Engine Oil Pressure TOO HIGH … I wonder if anyone could help me or should I have to spend more money on this car …
I have a 1986 1/2 Toyota Supra . It was running fine until I tried to flush the coolant w/ Prestone Super Radiator Flush and after that I got over heated on the freeway but I did not stop right away (what a stupid mistake I made) until I made it to a gas station (@5 miles.) Anyway, I had the head gasket replaced. And less than 2 weeks later, the oil pump stuck, the oil filter was swelling up so big that it leaked most of the oil onto ground. I drove home one night after work with almost no oil left inside the crank case. I did not know until I get inside the city where I have to stop at the traffic lights and see smoke came out from under the hood. During that two weeks I was driving with the oil pressure way too high, around 100 psi. Two days ago, I had the oil pump replaced as I listen to the mechanic that done the head gasket job on my car. The problem still persists. The oil pressure is still showing high; inside city, the oil pressure is about 60 psi and the pressure is @100 psi on freeway… This new oil pump costed me $192 before tax and it had to be ordered directly from Toyota Dealer. I let the mechanic know and they puzzled. I wonder if anyone knew or experienced this kind of problem after doing the engine head gasket… I mean, what is wrong with my car now??? So far this month I have spent more that a thousand dollars already …
Please HELP me analyze the problem…
Any comments will be greatly appreciated with all my heart…

Answer: One idea on this problem…you said the high oil pressure occurred after the head gasket was replaced? Sounds to me like someone either a) put in the wrong head gasket, and it blocked some of the oil channel holes, preventing oil from reaching parts of the engine, and creating back pressure, or b) installed the head gasket improperly, with the same result.
Unfortunately, the only way to find out is to pull the head again…and then, eyeball the gasket & the head & the block. Some heads & gaskets have extra holes or channels, with no matching opening on the block, or vice versa. If you have an opening on the head, and a matching one on the block, there’d better be one on the gasket.
If you had this done at a reputable and trusted shop, a dealer might or might not be that, they’ll pull the head and tell you honestly if they screwed up, and treat you fairly about the bill. You might have it pulled at a different shop, & if that’s the problem, go back to the first & have ‘em pay the bill (if they will).
I must add a disclaimer…this is only an idea, if you pay someone to pull the head & this ISN’T the problem, you’re out the cost of this second head gasket replacement…

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