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Need to relieve tension on serpintine belt, V6 '02
I'm replacing power steering pump, and need to relieve tension on serpintine belt, V6 '02 Sonata. Can't fit 1/2'' breaker bar into slots on belt tensioner, they're too shallow. Is there a special tool?
no special tool required the size of that square drive is 3/8 there is a special tool for belts made by gear wrench that makes it a lot easierno special tool required the size of that square drive is 3/8 there is a special tool for belts made by gear wrench that makes it a lot easier
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this sounds like the belt is worn and needs replacing.when its damp and cold if the belt is worn it will slip easier under this condition than in warmer weather.also the belt tension may not be proper.if this has a belt adjuster that you can adjust then the tension may need to be tightened.if it has an automatic belt tensioner(one that adjust tension all the time)like a serpintine belt then the tensioner may need to be replaced as the spring that crates the tension do get weak over time.
Typically a belt will come off if all the pulleys are not perfectly aligned.
If you recently replaced a power steering pump and the pulley was not properly seated all the way down where the pulley front is flush with the metal shaft from the pump then you will shred the belts and they will come off. If you ONLY swapped the tensioner and idler pulley you may have installed the tensioner so it isn't parallel to the other pulleys but that would be very rare because it would have been difficult to get the belt on if it was not properly installed. There also could be a damaged plastic pulley that could be "cutting" into the belt which would also cause the belt to slip off.
You required to remove the front cover of the engines. You will be finding the timing belts and drive belts which is connecting the crank shaft at the bottom to A/C compressor, power steering pump coolent pump and a belt tensioner.
You have to loosen the belt tensioner and remove the belt. then you have to remove the pump. Before removing the coolent pump, you need to drain coolent, so that you can refill the same again.
release tension on belt by:
-put a socket/breaker bar or ratched on the tensioner pulley bolt and use it to relieve tension on the belt
-slide belt off tensioner pulley. replace with new belt in same pattern
across all pulleys and again relieve tension on the tensioner puller to
slide the new belt back on
--you may need to remove the bolt on the tensioner closest to the pulley (i don't know just judging by the picture i found)
---if you don't know what the tensioner looks like look up the
part on autozone's website for a picture you can match on your car
there should be a belt tensioner somewhere in the route. one belt controls everything. most are auto tensioners nowadays. why do you need to loosen the belt
If the belt keeps slipping off the you need to replace the tensioner(its the pulley you have to move to get the belt on and off,and that part should be inexpensive to replace from any parts store.
Item
Part Number
Description
1
3A733
Power steering pump pulley
2
8620
Drive belt
3
2E884
A/C clutch pulley
4
6316
Crankshaft pulley
5
6B209
Drive belt tensioner
6
10344
Generator pulley 
Item
Part Number
Description
1
10344
Generator pulley
2
19A216
Belt idler pulley
3
3A733
Power steering pump pulley
4
6C301
Drive belt
5
2E884
A/C clutch pulley
6
6B320
Crankshaft pulley
7
8509
Water pump pulley
8
6A228
Drive belt tensioner
no special tool required the size of that square drive is 3/8 there is a special tool for belts made by gear wrench that makes it a lot easier
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