Question about 1988 Mazda B2200

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Knocking at 2 to 3 thousand rpms

I have a 1991 mazda b2200 2.2 carb with about 170,000 on it. it recently started to smoke so we went ahead and put new oil seals,piston rings and rod bearings in we put it back together it starts up just fine idles fine but when it gets warm the oil light comes on and starts to knock when it reaches 2,000 rpm when you let it go down to a idle it stops the car drives just fine but just knocks and the oil light comes on and theres enough oil in it please help i was recently laid off and have no other option but to do it myself

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When you put the eng back together did you put a new oil pump in it when you put it back together... the pump might be week

Posted on Jan 03, 2009

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If you didnt have the crank ground or the rods resized and over sized bearings instaled then the issue with your engine is beyond advice other than remove engine and rebuild correctly as there is too much clearance and the oil cannot build enough pressure especialy when hot as it thins out and becomes harder to maintain pressure.Your problem is crankshaft bearings have excessive clearances or oil pumps pressure relief valve is jammed/jamming.good luck and hope its just the pump.

Posted on Nov 04, 2008

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