why is my oil temp so high.i flushed the cooler,found broken impeller pieces.flushed all the lines.this is a carb 454 mag.it wasn't this high from the factory right? i am using mobile 1 to protect from the high temps but it should be around 220.i cant hold it wide open for more than 30-40 seconds and it sucks.

Back flushed? Bearing clearances? Not enough info.

it was backed flushed,stock motor,20 psi oil press at idle 45 3000 rpm

I just found out I had a faulty circ pump (impeller fell off). I was having high block temperatures as well. May be worth it to pull it off and inspect it for damage or clogs.

just replaced circ pump,new sea pump last year.have plenty of water pressure.could the hose in the transom be bad?

I would check out your T-stat housing. Maybe most of the water is bypassing the engine and going straight to the exhaust. One big thing to check is If the little balls are missing/damaged/springs weak, etc. for the lines running to the exhaust, that may be your problem.

Also, make sure you have the right gasket in the top part of the assembly. There are like 3 different designs that all fit, but you need the correct one for the specific T-stat boss you are running.

well just pulled my oil cooler off and looking down thru the honeycomb passages the 4-5 that are in line with the oil lines were plugged with chit.could this be my problem or should i keep looking.its hard to believe the 4-5 passages plugged could cause this considering theirs 30 or so.just wanted to know if this could be it

That's 16% blockage, if my math is correct, which could be an additional 16% LESS cooling of your oil. I think it may be the issue.

Dave

i was going to suggest removing the end caps if your cooler has them. if sedimented, use a small diameter strand cable in a drill at low speeds to clear.

good luck

and yes those passages , especially if together will raise the temps, kinda like a heat sinc, but in reverse

Engine water temp and oil temps go hand in hand, almost. What temp tstat do you have in the coolant?