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Bearing noise?


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Well I have read the previous posts about this, but it doesn't answer me. I have an 85 GL wagon 4wd. Well a little bit ago, an knock/bump became hearable in the rear end. This knock will stay constant with speed. I jacked the rear up and spun the tires and close to the rear passenger was the source...kinda. I took out the cv on that side and took it for a drive. The knock quit, until I turned right then it bumped again. It doesn't knock when driving with the shaft out, only on turns. I reinstalled the CV but backwards this time and the knock is still there, but very faint. Could this be my wheel bearings? I also shook the tire and it was tight not loose. I'm a bit confused any help would help. Kind regards, Dan

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I would say it's a bearing... just by the description turning tells a tale... by turning pressure is applied and the bearing will squawk/growl/grind in repetition... when you turn the other way it is still noticeable but not as much.. should be your left rear if you turn right and it sqwaks..

 

I never took the bearings out.. there is an inner and outter bearing.. i just splooge some grease into the outter put it back together and all is good..

Edited by Len Dawg
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i've rarely seen Subaru wheel bearings exhibit play when they're failing.  i've even seen them feel tight on the car and not after i have it removed...not sure how/why, but they just seem unpredictable. 

 

two wheel bearing determination "aids" - though nothing is ever definitive with wheel bearings: 

 

1. listen with mechanics stethoscope on hub or strut spring while turning wheel - listen for noises

2. hit it with a temperaure gun after driving - after hearing the noise.  compare both sides in the same areas - usually takes a few readings to get a feel for what's happening since temps can vary wildly across a short distance. 

 

here's a thread i made:

http://www.ultimatesubaru.org/forum/topic/143097-is-that-my-wheel-bearing-easy-diagnosis/

pictures don't seem to be showing up for me so here's a repeat:

http://www.subaruoutback.org/forums/99-do-yourself-illustrated-guides/111946-easy-wheel-bearing-diagnosis.html

 

but again - that's not definitive either - it only sometimes shows ones that exhibit no other symptoms. 

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