09-08-2020, 01:28 PM
Join Date: Aug 2007
Location: Caracas, Venezuela
Oil Pressure Drops When Warm
After engine is warm, oil pressure indicator starts to oscillate and drops to zero. My truck has been parked over a year and before starting it, I change the oil, filter and added a can of Seafoam to clean and flush the oil system.
However, when engine warms and oil pressure starts to oscillate, I notice valve lifters knocking. If I turno off the engine for while and start it again, oil pressure comes to normal again and valve lifter sounds disappears for a while. If I press the gas pedal, problems seems to worsen.
The oil removed was very dirty and kind of sludge. That’s why I opted to use an oil flush product.
I have three theories in mind:
1. The Seafoam thinned the new oil too much.
2. There is oil sludge in the oil pan that blocks oil pick up screen.
3. The oil pump is busted
Your expertise is highly appreciated. Thank You!!
07 RAM 2500 SLT, CUSTOMIZED BORLA EXHAUST SYS, 4" LIFT KIT, 37" PRO COMP A/T KM2, FRONT & REAR EATON-DETROIT TRUETRAC POSI & 4.56 GEARS