1999 Chevrolet Blazer LT 4WD SUV engine knock from underneath
#1
1999 Chevrolet Blazer LT 4WD SUV engine knock from underneath
Hi, I am new here and would greatly appreciate some help
Car: 1999 Chevrolet Blazer LT 4WD SUV
Problem: engine knock coming from underneath engine, oil pressure rises as I press on gas (knocking gets louder).
What have I tried: Using stop knock to try to quiet lifters.
I would appreciate any insight I'm leaning towards a bad bearing or lifter due to the previous searches.
Car: 1999 Chevrolet Blazer LT 4WD SUV
Problem: engine knock coming from underneath engine, oil pressure rises as I press on gas (knocking gets louder).
What have I tried: Using stop knock to try to quiet lifters.
I would appreciate any insight I'm leaning towards a bad bearing or lifter due to the previous searches.
#3
Car: 1999 Chevrolet Blazer LT 4WD SUV Problem: engine knock coming from underneath engine, oil pressure rises as I press on gas (knocking gets louder). What have I tried: Using stop knock to try to quiet lifters. I would appreciate any insight I'm leaning towards a bad bearing or lifter due to the previous searches.
When bearings go out, fine metal particles get into the oil. If you let a sample of old engine oil settle overnight you can see the metal particles as a shiny layer when you pour from one glass container to another.
Bearing knocks can also be diagnosed by inducing a miss into each cylinder, one at a time by pulling a plug wire. When you find the cylinder that quietens when it misses, you have found the one that is knocking.
Good luck
Last edited by LesMyer; 02-05-2016 at 11:11 AM.
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