Question about Mercedes-Benz Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: do 4runners crank pulleys go bad
Yes, in most cases you can. The crankshaft pulley is bolted to the front of the crank shaft by either 1 large bolt and thick washer, or by 4 small bolts around the edge of inside of the pulley, depending on model.
Remove all belts that are driven by the crankshaft pully and then grasp the pully to see if it is loose in some way.
To remove the large bolt(if that's what you have), will require the use of a strap wrench which can be gotten for the free loan-A-tool from Autozone.
Only if the end of the crankshaft was damaged in some way would you have to replace the crankshaft.
If you would like to contact me again about this or other problems, feel free to do so.
ASE Master Technician
Posted on Nov 25, 2008
Somethimes this happens over time. It is usualy caused by an oil leak at or above the pully causing the rubber in the "hamonic balancer" which is part of that pully system to fail. If you don't have it repaired you will find the pully will wear through the cover behind it. So be sure to get it repaired.
Hope this helps, Good luck.
Posted on Mar 26, 2009
Maybe, you would have to remove the belts and then take a look at all the pulleys, it could be a pulley or a bad waterpump, or even something in the timing belt, like a timing belt pulley or tensioner pulley or waterpump,the best way to find out is to remove all the belts and then start the motor and listen for the noise, if the noise is still there with the belts removed then its something in the timing belt, but is the noise goes away then its something with the belts a pulley or a alternator, you would have to inspect all pulley and the acc, hope this helps,
Posted on Mar 31, 2010
Testimonial: "Thanks so much that is extremely helpful and explained in such a way that a layman can understand. "
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