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Location:
tas
Registered:
June 2002
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a problem that no one can work out.
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Mon, 18 October 2004 05:35
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Sorry it's not a toyota, but worth a try.
My step dad has a 4wd subaru 1800, and since he buaght it, it made a bad vibration or bad bearing type of noise once upto 60km/h +.
first thought was a wheel bearing, got new bearings but the noise persists, ok CV joints maybe, subaru's are well known for weak CV's that wear out exrtra quick, all CV's replaced, noise persists.
Right it must be in the gearbox! I spent 2 days taking out the gearbox and putting another one in. NOISE PERSISTS! disc's aren't touching anything, brake pads aren't stuck. What else could it be?
Tried putting it into nuetral, and also putting the cluth in, that didn't change anything, handbrake isn't the problem. We're both really stumped on this one. Thinking about taking it to an engine dyno so we can look/hear where the noise is comming from while the car is under load.
any other ideas what it could be?
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I supported Toymods
Location:
Sydney, NSW
Registered:
February 2004
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Re: a problem that no one can work out.
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Mon, 18 October 2004 05:47
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drive train?
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: a problem that no one can work out.
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Mon, 18 October 2004 05:48
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loose suspension component or broken engine mounts?
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Club Member
Location:
sydney
Registered:
May 2002
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Re: a problem that no one can work out.
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Mon, 18 October 2004 06:03
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it will be an engine mount or the driveshaft uni's... pretty common failures for that car.
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Mon, 18 October 2004 06:13
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well the driveshaft has been replaced with one from the parts car, but the engine mounts is a possibilty, altho why wouldn't it make that noise from just revving the engine?
hmmm another thing to note is that my step dad said the noise would quiten when turning left, wich sounds exactly like a wheel bearing! he has replaced them 3 times and still no change. All the so called experts put it down to the gearbox. But i've ruled that out by putting a perfectly fine gearbox in.
Maybe the tire's themselves are genarating the noise? i'll go check, and i'll have another check at the suspension too. thanx for the suggestions.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: a problem that no one can work out.
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Mon, 18 October 2004 06:23
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had the wheels balanced lately? has one thrown a weight?
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Mon, 18 October 2004 08:14
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hmmm that's something i haven't thought of. But i'd expect i would feel the vibration thru the steering wheel, wich isn't the case.
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Location:
Melbourne, Vic
Registered:
October 2004
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Re: a problem that no one can work out.
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Mon, 18 October 2004 08:22
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Check the engine mounts for sagging, Have had a commodoore doing the same thing, replaced many parts, couldnt find. ended up being the engine mounts saging a little so that the sump was touching the crossmember underneath the steel bash plate. vibration came through everywhere - brakes, suspension, steering and transmission. Could not see, but could feel no gap when feeling with fingers. New mounts - drove like a new car!
Good luck
- Phil
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Location:
Brisbane
Registered:
February 2003
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Re: a problem that no one can work out.
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Mon, 18 October 2004 10:31
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drive train (to rear) out of balance?
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Location:
tas
Registered:
June 2002
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Location:
Montrose, VIC
Registered:
May 2002
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Re: a problem that no one can work out.
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Mon, 18 October 2004 12:15
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Could even be real simple, like the exhaust rubbing somewhere 
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I Supported Toymods
Location:
Perth
Registered:
May 2004
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Re: a problem that no one can work out.
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Mon, 18 October 2004 12:20
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i had kind of simmilar problem....check weights on tail shaft, sometimes smart ass people get the magnetic wheel weights and stick em on ur tail shaft...and think its funny.....not so funny when u make them eat it!!! so yeah...check if one of the tail shaft weights hasnt fallen off (or appeared) , i assume the tail shaft is 2 pce?
Adam
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Location:
Menai area of Sydney
Registered:
June 2003
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Re: a problem that no one can work out.
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Mon, 18 October 2004 13:37
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Vibration when driving and not while reving engine implies that it's occurring when the engine is under load. So soft engine mounts may be letting the engine move too much when under load and hence letting something rub.
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Tue, 19 October 2004 04:01
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ok thanx, you guys have given me some more things to try out.
My step dad is actually building a dyno, well not a proper one, just one so he can put the subuaru on rollers and so he can hear where the noise is coming from without bieng in the car and driving along which makes it hard to diagnose.
i tell you what if it turns out to be something so simple were going to commit suicide! kidding
i owe a carton of beer if any of you guys hit the nail on the head with the problem. Will keep you's updated. Hopefully tonight.
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Thu, 21 October 2004 02:00
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well we made a set of rollers to put the wheels on, and got the tires spinning up to about 80km/h where the noise starts, problem is the rollers make too much noise to hear anything else. DOH! gonna try coating them in rubber material.
Anyway we noticed the right front wheel was wobbeling abit, and we traced that wobble to the right tie rod balljoint wich was worn to buggery. Put another good one in and that stopped the wobble in the wheel, but guess what that fucking Vibration/noise is still there!
So frustrating. We now know it is not engine mounts, as you can just hit the clutch and put it in neutral and the engine revs die down, yet the noise is relative to KM/h speeds. So it's back to changing them fuckin wheel bearings AGAIN for the millionth time and hopeing the noise goes away! I'm taking measurements with a digital caliper to make sure parts going into the car are the same size as original parts, as subaru always change sizes on there parts from year to year. So far we found they changed the length of theCV joints by about 5mm going from one year to the next, but that did not cuase the noise.
Also the noise does sound like it's coming from the front, but it's actually hard to tell, i'd say the noise is in the 100hz bass range, where you can't really tell where the noise is coming from.
Also becuase the subaru is front wheel drive until you put the gearbox ito 4wd mode, we took the driveshaft out and put a plastic bag with rubber bands to stop oil leaking out the back of the gearbox and took it for a drive. Yep noise still there so driveshaft is out of the equation too.
going mad over this! 
[Updated on: Thu, 21 October 2004 02:10]
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Location:
Brisbane
Registered:
February 2004
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Thu, 21 October 2004 06:37
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Hey Dust, wow that is pretty lucky you wern't going too fast when that happened, can't trust mechanics, the only mechanic i will trust with my car is me.
thanx for the support 
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Fri, 29 October 2004 08:41
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well problem finally solved. *bangs head* was a wheel bearing, but it was on the other side, it doesn't add up, as the bearing would make noise when load was taken off it, instead of when under load! anyway here is what the bearing looks like cut open, and just a warning be real careful doing this, as they release a lot of force when cut open.
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Location:
NSW, East Coast
Registered:
July 2003
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Re: a problem that no one can work out.
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Fri, 29 October 2004 11:02
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| dingaling wrote on Fri, 29 October 2004 18:41 |
well problem finally solved. *bangs head* was a wheel bearing, but it was on the other side, it doesn't add up, as the bearing would make noise when load was taken off it, instead of when under load! anyway here is what the bearing looks like cut open, and just a warning be real careful doing this, as they release a lot of force when cut open.
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Well done, so who gets the beer
Cheers
Steve
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Location:
tas
Registered:
June 2002
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Re: a problem that no one can work out.
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Fri, 29 October 2004 14:32
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ah well it looks like the carton of beer goes to me 
But i should send you all a beer in the mail too.
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(he's going on a trip around australia in his subaru)