Wednesday, November 24, 2010

Oil pressure drops when coming to stop. 95 Dakota 318?

My Dakota has over 200k and a week and a half ago I checked t he oil after midnight and found no oil on the stick. I guesstimated on how much to put it and left it. Turns out I put 1/2 quart over. Yesterday I drove 90 miles to the lake and on my way home whenever I came to a stop my pressure would drop to L mark. Then would come back after I stopped or started accelerating. I immediately changed oil and filter. But problem still occurs and only occurs after the engine is warmed up.



I would hate to have to replace the oil pump. I don't have much time.



BTW: this truck usually tows a trailer everyday. (but hasn't since I put 2 much oil in)



Also you can faintly smell burnt oil when you come to a stop (before I changed oil and after High revs)

(does not have a burnt oil smell after oil change.Oil pressure drops when coming to stop. 95 Dakota 318?
Possibility of oil passages clogged due to age. Could explain low pressure when coming to a stop. Excess oil doesn't generally cause any problem other than those associated with bringing it up to the level of the crankshaft in the oil pan which will whip it into a foam. That could of course cause problems.



I'd recommend starting with an oil passage block cleaning (at a shop).

Or, if you're mechanically inclined ... remove the oil pan, clean out the oil pan, and the pump pickup and screen.Oil pressure drops when coming to stop. 95 Dakota 318?
The oil pressure gauge reading is supposed to drop to it's lowest acceptable level at hot engine idle. That's normal. The only question is, what the true shop oil pressure gauge reading is at hot engine idle. You'll have to either buy a professional oil pressure gauge or take it to a shop. It should read more than 12 psi.



http://www.napaonline.com/MasterPages/NOOil pressure drops when coming to stop. 95 Dakota 318?
at that mileage you could have a worn out pump. at idle it cannot produce the pressure, but off idle, things do improve. the oil leaks could account for the smell. time to do an actual oil pressure test with a separate gage.Oil pressure drops when coming to stop. 95 Dakota 318?
normally when you put in too much oil it can leak out the rear main seal, that could be the smell when you stop because of the oil on the exhaust. the oil gets thin when it warms up.
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