My son has an 01 Grand Cherokee with the 4.0l, 130k miles. We've had a bit of engine trouble lately and I just paid $600 in engine work, cps, injecors, plugs...
I usually don't drive it, but today I noticed the engine oil pressure gauge takes about 6-8 seconds to reach 20 PSI. Running Rotella 10w-30. This is with a warm engine.
It always reads 20 psi, at idle, at highway speeds, OD off, neutral at 4000 rpm, doesn't matter, always 20 psi.
The oil sending unit was replaced 6 months ago. I bought it from O'Reilly's.
I'm used to seeing oil pressure increase with engine rpm on my other vehicles. Is this normal to maintain 20 psi regardless of engine speed?
I read a lot about the oil pump replacements, dunno. I'll check pressure with a mechanical gauge before the oil pump, but was hoping someone could enlighten me a bit before I dump any more money into this Jeep.
Thanks
I usually don't drive it, but today I noticed the engine oil pressure gauge takes about 6-8 seconds to reach 20 PSI. Running Rotella 10w-30. This is with a warm engine.
It always reads 20 psi, at idle, at highway speeds, OD off, neutral at 4000 rpm, doesn't matter, always 20 psi.
The oil sending unit was replaced 6 months ago. I bought it from O'Reilly's.
I'm used to seeing oil pressure increase with engine rpm on my other vehicles. Is this normal to maintain 20 psi regardless of engine speed?
I read a lot about the oil pump replacements, dunno. I'll check pressure with a mechanical gauge before the oil pump, but was hoping someone could enlighten me a bit before I dump any more money into this Jeep.
Thanks
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