Chrysler 300, 300C & 300C SRT-8 The flagship of the Chrysler lineup offers the driver every bit of class of any European luxury sedan, combined with the availability of the Hemi, the engine which dominated the American Muscle Car Era

Low oil pressure 5.7 hemi issue

Old 09-11-2015, 01:11 PM
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Join Date: Sep 2015
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Post Low oil pressure 5.7 hemi issue

Hello, I have a Chrysler 300C 5.7 HEMI made in 2005.
The previous owner changed oil every 15000 miles therefore the crankshaft broke.
I removed the engine and replaced the crankshaft, crankshaft bearings and con rod bearings. 1500 miles later I started the car in the morning and the engine started knocking at valve lifters so I started oil pressure measurement and it was 80% lower. I ordered a completely new oil pump. It stayed the same after replacing the oil pump the pressure is still 80% lower than normal.
What could cause this?
I am thinking whether it can be bad camshaft bearings or a broken valve lifter around which the oil pressure could escape?
Or some other oil pressure valve besides the oil pump?
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