My 97 Chevy 1500 is knocking bad it lost all oil pressure so I changed the pump once done it held pressure but still knocked until I started driving then it lost all pressure again I changed pressure

Asked by Mar 19, 2014 at 07:32 PM about the 1997 Chevrolet C/K 1500 WT Standard Cab LB

Question type: Maintenance & Repair

Switch and changed nothing it still holds Prrssure when it first
starts but looses when driving no smoke from the exhaust and I
see no sign of oil and water mixing is there anything else could
be wrong  5.7 liter 350 vortec

2 Answers

97,095

Rod and main bearings is most likely the knock, loss of oil pressure is most likely cam bearings, time for an engine overhaul.

1 of 1 people found this helpful.
18,785

well, if it knocks the only way to fix that is to replace what is knocking. AKA rebuild the motor. You have low oil pressure because there is enough clearence to knock. The pressure switch just tell you your oil pressure. Your oil pump isn't the issue.

1 of 1 people found this helpful.

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