1995 Buick Riviera supercharger

1995 BUICK RIVIERA

240,000 MILES • 3.8L • 6 CYL • TURBO • 2WD • AUTOMATIC

DAVEVAILLANCOURT

MEMBER
2 POSTS

supercharger making a big rattling noise and it changes under load
would like to get schematic of that unit -supercharger
no kits available
what is likely cause
bearings ?
it has oil in it that is checked

Dec 9, 2013 at 8:58 AM

HMAC300

✓ASE Certified Mechanic
48,601 POSTS

if it's rattling it may be worn out. it not a serviceable part meaning you have to get the whole thing. however check the belt and tensioner it may be a bad tensioner making the noise so replace both.

Dec 9, 2013 at 10:06 AM

HMAC300

✓ASE Certified Mechanic
48,601 POSTS

GM vehicles equipped with superchargers.
Premature failure of supercharger bearings.
When the belt tensioner starts to fail, belt tension increases dramatically. This tension shows up as side-loading in the supercharger rear bearing.
Periodic inspection of the belt tensioner should be part of the regular maintenance routine. Before operating the replacement supercharger, the tensioner must be inspected and replaced if defective. Unless the tensioner is checked and replaced as needed, supercharger-bearing failure will occur, causing premature catastrophic failure.
While this problem is prevalent on GM vehicles, this inspection should be performed on all belt-driven supercharged vehicles. Please check your vehicle service manual for the recommended inspection and service.

Dec 9, 2013 at 10:08 AM

DAVEVAILLANCOURT

MEMBER
2 POSTS

thanks
idler has been changed
so look like supercharger is culprit
dave

Dec 9, 2013 at 10:24 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.