There is no direct replacement for the AC Tensioner pully assembly on the Metro autos. Bearing replacement is the only way to fix this item since no one makes it.
Rubber sealed Bearing No.# 6006 DUL1 - (Google: '6006-2RS 6006-ZZ Radial Ball Bearing 30X55X13' or find it at: http://www.thebigbearingstore.com/servlet/the-453/6006-dsh-2RS-6006-dsh-ZZ-Radial-Ball/Detail
It retails for about $3.00 with $3.65 shipping. I haven't replaced the bearing yet but others have so it can be done at home using oversized/exact sized sockets and a drift. Good luck!
The tensioner bolt for a 96 Cavalier is in the pulley for the tensioner. The tensioner is in the middle of the front of the engine.
on the front of the engine on the serpentine belt, it's bolted directly to the engine.
The tensioner is the arm on the passenger side of the engine near the front that has a pulley on the end and controls the tension of the serpentine belt. www.trailvoy.com
If you include the model year and engine size, you might get more help.
Put the serpentine belt on to the pulleys of your 1994 Chevy engine. Tighten a serpentine belt with the tensioner pulley.
It is the small pulley with a nut in the middle on the pulley assembly!
I don't believe there is an idler pulley on that model, just a tensioner pulley
Pry bar.
If you're standing at the front of the truck and looking into the engine compartment the tension pulley is on the left side about half way down.
You can change the serpentine belt by loosening the tensioner pulley. When the tensioner pulley is loose and the serpentine belt will become loose. Put the new serpentine belt on and tighten the tensioner pulley.
You can adjust the belt tensioner by loosening the tensioner bolt. When the tensioner bolt is loose the tensioner pulley can move back and fourth.
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