wrap the belt around the pully to hold pully still
on most cars it in the front at the bottom of the by the crank pully
No need to drain rad You dont even need to remove the lower rad hose just remove the four bolt on the water pump pully 10mill wrench then the pully should come off after that there are 5 8mill bolt that attach the pump to the housing easy as that by the way you need to left up the idler pully to get the belt off it swings up See "How to change water pump on 1990 Lumina". 98 lumina water pump is it the same
Just installed a crankshaft sensor on a lumina APV. 1. remove 3 bolts from cover under the flywheel so you can use a visegrip plyer to hold the flywheel from turning 2. remove the serpentine belt 3. Jack up car to remove front right wheel, and plastic cover to gain access to the crankshaft pully 4. Remove bolt from crankshaft pully ( you will need an extra stong breaker bar to loosen the screw. 5. Use a large pully remover to get the pully off 6. the cover over the sensor will pull off, try no to break it. 7. remove a screw that goes up vertically to lock the sensor in 8. wiggle and pull the sensor out. Reassembly proved to be very easy
Typically, there is one pulley that is mounted on a spring arm to maintain proper belt tension. Just turn the bolt on the idler pulley and the tensioner will release.
a gear or a pully
remove the bolt on the pully or use a pully remover depending on the style of pully and put new one on.
Bypass pully...ebay.com
I by passed the ac pully in my 1994 Oldsmobile with a shorter belt. to accuratly do this i ran a piece of twine around all the pullys where the belt would normally run only by passing the ac pully. the length of string gave me an accurate measurment to purchace a belt that fit. i have had no problems. you may see if this is possible with your van.
It is on the front of the motor, it will be the bottom most pully.
If there is a slot in the pully, you stick something in the slot that is long enough so that it will, when the pully turns rest against some non breakable component on the vehicle and stop the pully from turning. If you are trying to get the crankshaft pully off, you will usually need to access the point where the transmission connects to the engine flywheel. You then need to stick something strong, like the flat edge of a prybar into the flywheel to keep it from turning while you put pressure on the crankshaft pully bolt. This usually requires help from another individual. It is very important that what you use to hold the flywheel in place is strong enough to keep the flywheel from turning without breaking. If you break it off in the flywheel when turning it, there is a good chance that you will find yourself removing the transmission to get whatever broke off out. If it breaks off and you don't remove it, it will damange your transmission. If you have an impact wrench with an air compressor, this can probably be done much more easily as long as your impact wrench is strong enough to break the bolt free and you can fit it onto the bolt.
the mark, scale is on the left side of the ceank pully
you dont they are self adjusting with the tentioner pully...