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Date:         Fri, 9 Dec 2011 14:30:04 -0800
Reply-To:     Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject:      Re: Rear Wheel (bearing?) noise.
Comments: To: mcneely4@COX.NET
Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original

no...... you run it in the air silly.

support the rear ( 2WD drive vans only ! ) in the air on very big solid jackstands ( mine are Snap-On brand truck jack stands rated at 10,000 lbs ) .. and you run it, in gear.. and you carefully get under there ( or use a lift ) .

be creative .

----- Original Message ----- From: "Dave Mcneely" <mcneely4@COX.NET> To: <vanagon@GERRY.VANAGON.COM> Sent: Friday, December 09, 2011 6:33 AM Subject: Re: Rear Wheel (bearing?) noise.

> ---- Dennis Haynes <d23haynes57@HOTMAIL.COM> wrote: >> Use a stethoscope or the screwdriver to ear method to further isolate the >> noise. Rear wheel bearings last a long time but they do require >> lubrication >> at some point. If a rear wheel bearing is suspected they really need to >> be >> replaced as a failure under way can be catastrophic and will often result >> in >> the stub axle or wheel flanged being trashed. Bearing noise with >> acceleration changes point more to transmission problem than a wheel >> problem. > > Hmmm ..... . How does one (of course, a mechanic with a lift might be > able to do so) use a stethoscope or a metal rod to listen for the exact > point from which a noise only evident in motion emanates? Wheel bearings, > axles, transmissions only emit their noises when the part in question is > being driven. Or is there some way to get them to by noisy when > stationary? mcneely > >> >> Dennis >> >> -----Original Message----- >> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf >> Of >> Don Hanson >> Sent: Thursday, December 08, 2011 3:18 PM >> To: vanagon@GERRY.VANAGON.COM >> Subject: Rear Wheel (bearing?) noise. >> >> Not long ago I replaced both my CV joints on the right axle, having >> done >> the left a season ago. I was hoping this CV replacement might also quiet >> down the right rear wheel...but it has not. Since I put on some new rear >> Hakka tires, I can hear this 'bearing-style' noise more clearly, >> especially >> when I am running straight at about 30mph (below where the wind noise >> drowns >> it out) on very smooth asphalt. The noise I am hearing has been with the >> van >> all along, I think, but not enough to be really alarming or a "stop >> driving, something's gonna bust" type noise.... Since I'm leaving soon >> to >> do about 4000 miles along mostly remote rural highways on my annual >> winter >> snowbird migration, I am trying to address most of the problems I can >> anticipate...within reason, of course...I can't afford to rebuild the >> whole >> bus or buy a Go Westie Gold-plated Syncro with Extended warranty. >> >> This morning, while I had the floor jack out to do some lubing of the >> shift linkage and to spread some peanut oil on my header system (inline >> four >> with custom exhaust) I did some 'diagnostics'. With either rear wheel >> lifted and the vehicle in neutral, of course the wheel in the air >> spins....5sp manual tranny.. but you can stop it with your hand....So, >> neither wheel makes any unusual noise in that mode.......Grabbing the >> tires, >> top and bottom and rocking the wheels....both feel very similar in >> 'play'....what you normally feel when testing like this...maybe about >> 1/8" >> of rocking...over all...similar to what I always feel on any wheelbearing >> for freeplay...Ok... Now, when I put the tranny in gear with one rear >> tire >> in the air....the driver's side is quiet...the tire turns like when it is >> being dragged over in neutral...at about the same noise level and it >> feels >> smooth....but on the right rear wheel, when you let out the >> clutch....that >> one sounds like bad bearings....Shift into neutal and let it go >> round...quiet.... >> So, with new CV already and no undue freeplay at the wheel indicating >> bad >> wheel bearings...and no alarming noise when the wheel is turning under >> clutch drag, but ugly noise when it is turning in 2nd gear with the wheel >> up....What? Maybe related....I sometimes get a buzzing vibration on hard >> acceleration from a dead stop, combined with a left turn...I have >> surmised >> this is caused by my 50degree engine configuration allowing some contact >> with the body...but maybe not...maybe related to the right wheel drive in >> some way. .I have a new set of wheel bearings for the rear that I >> planned >> on taking along as spares on my trip.. >> >> I have no indications of transmission problems (unless this noisy right >> side drive wheel is one). I am running Swepco, changed out twice per >> year >> and I have not seen any metal in the old oil.... >> >> I'm OK doing repairs away from home on my own, but I don't want to lose >> a >> transmission while on a trip. This noise has been with the van for as >> long >> as I have had it...I am 'caught up' enough on all the other stuff now >> to >> let it bother me a little.. Should I just do the wheel bearing and see >> if >> the noise remains, then worry about the tranny or something else? Any >> way >> to further isolate this off-sounding rotational noise without doing the >> wheel bearing right now? (it's 27degrees in my shop, I'd rather do it in >> the >> desert in 80degrees, despite the sand) >> >> Anyone have any thoughts on this that might help? > > -- > David McNeely


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