Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Chad ,Welcome To JustAnswer, I'm reviewing your question and I will be be posting a replay ASAP
you cant change the main bearings with out pulling the engine .
the heavier oil idea will be better and if you noticed noise is less significant after then that confirms it is internal?
any oil usage ? , any smoking from tail pipe ? do you have full power under load ?
Please let me know
ASE Certified Technician
1998 Buick Century V6-3100 3.1L VIN M SFI
REMOVAL PROCEDURE 1. Remove the left instrument panel sound insulator.
1- check cable under the steering at the gas pedal
2- check the cable routing from it to the throttle body
3- if all that is good , than suspect the throttle body itself
please disregard the last reply was not meant to you , i apologize for that .