Left turns and sometimes right turns, grinding noise
I have a 2001 Saturn L Series. When I mostly turn to the left and have to use my brakes, there is a grinding noise. Sometimes also the right. I have heard some say it's the wheel bearings. I just had two new tires put in the front with a wheel alignment. Is this a noise I need to be concerned about? Will it hurt my car? Could it be I need brake fluid?
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Re: Left turns and sometimes right turns, grinding noise
No. Low brake fluid won't cause your brakes to grind. It wont hurt to check the fluid level though. Yes, it is something you should be concerned about. When they replaced your tires, did they say anything to you about the brakes? Most shops will take a look at the thickness of the brake pads especially since they already have the wheels off and that just happens to be the best possible oppertunity to check the brakes for wear! Did you have the noise before the tires were replaced and if so did you mention it to the shop? It is possible that it is a wheel bearing but it is more likely that it is the brakes. The only way to tell for sure is to have it inspected.
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Sounds like wheel bearing, an easy way to check it out is to just jack up that corner enough to get the weight off the wheel then with one hand on the top and one on the bottom of your tire check for any play. If there is play your bearing is bad. the play will most likely be very very little (less than 1/16 of an inch) but there should none whatsoever. if the grinding noise happens when turning left, check the right side or grinding when turning right check the left side. sometimes the bearing has a bad seal or wasn't properly lubed when being made.
CV joint on the left side is going out. It will grind once or twice "sometimes" when first starting to drive. Best to have both CV joints replaced. Roughly 400.00 to 450.00 parts and labor. Don't take it to a dealer. Dealer shop rates run 90.00 an hour. It will instantly become a 700.00 to 800.00 dollar job. A good reputable mechanic can order replacements and have it done in a day!
Grinding is a sign on brakes in need of replacement. Your pads are worn through and now the metal backing plate of the pad is grinding up against the rotor. Replace the pads and rotors asap to prevent further damage.
If you still think the noise is coming from the left side CV joint it would be more advisable to replace the entire axle as an assembly. For the time and effort it takes, you can usually get a rebuilt axle assembly for only a few dollars more than the CV joint and the boot required to repair one. You will need a large axle nut socket (usually 30 - 32mm) to remove the axle nut. The lower ball joint and tie rod will need to be separated along with the brake caliper and rotor, from the spindle. I would recheck the grinding noise before doing it. A lot of wheel bearings are mistakenly diagnosed to the wrong side. If the noise is loudest when turning left, most people would assume the left side wheel bearing is at fault. However if the noise is loudest turning left it indicates the right side wheel bearing is most likely at fault. Due to the weight distribution of the front end, turning left the weight all transfers to the right side, loading that bearing. Make sure thats not the case before tackling an axle.
the grinding grating rattling annoying sound is yor axles (velocity joint) it could be a simple thing as the boot rubber poping out and the grease spilled off or the bearing is shelling. In any case have the joint repaired or replaced. After this you will need to align as the changing or removing of the joint messes the alignment up.