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use a breaker bar to release pressure on automatic belt tensioner
If it is a serpentine belt you replace the tensioner pulley
how to release serpentine belt tensioner on 1991 C1500 Chevy Silverado?
Get a socket and ratchet and rotate the tensioner bolt counter-clockwise
There is no adjustment on the spring / Tensioner. You either have the wrong belt are the tensioner itself is bad. Replace tensioner are belt.
Loosen the tensioner pulley on your 2001 Chevy Impala. The serpentine belt will become loose. Take the old belt off and put the new belt on. Tighten the new serpentine belt with the tensioner pulley.
Use penetrating oil and correct size wrench.
No you can not, It is kept tight by a spring loaded belt tensioner with a smooth pulley on it. Probley needs a belt tensioner on it.
There should be a small square hole near the tensioner pully. A 3/8 socket driver will fit in the hole and then you can losen the tensioner.
if by "loosen" you mean loosening the belt then just put a wrench on the nut in the center of the pulley and turn it to the left. its basically spring loaded.
just a ratchet to fit onto the tensioner. crank the tensioner counter clockwise and it'll slack the belt.
there should be a tensioner pully. Put the 3/8 ratchet in the center of it and turn.