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Registered
Join Date: Oct 2001
Location: belgium
Posts: 39
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grinding noise
Hi,
I got a 68 912 which makes a grinding noise from the backside only when warm, with the gas pedal released , in gear and coming down in speed. I already checked or had checked the gearbox, wheel bearings, half axles, end play and did rebuilt the cylinder heads Has anyone of you had this on his 912? Because it happens with a warm engine i think something gets too tight or to loose but what? I hate to dismantle the engine completely without consulting this site first. Thanks, Patrick |
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11-25-2002, 09:20 AM
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Registered
Join Date: Nov 2001
Location: Austin, TX
Posts: 1,417
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Hi Patrick,
I had an odd noise in my wife's car that I was unable to isolate. Took it to my local garage where they attached a halfo dozen audio sensors to various points on the engine, transmission, Alternator, etc. Once attached, thru headphones and a rotary switch to move between sensors, we were able to drive down the road and isolate the sound quickly. Just a thought... Morrie |
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11-25-2002, 09:47 AM
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Join Date: Oct 2002
Location: Dallas, Tx.
Posts: 117
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Probably not but....
I've run into grinding noises on a couple of my cars in the past...one(a VW Jetta) sounded like the wheel bearings were about to sieze...I spent a lot of money replacing bearings ,drive axles and then went on to any bushing and suspension part that could possibly be worn...still made noise. Turned out to be the simplest explanation that I overlooked...brakes!! Only made the sound after it had been drive a short distance...rand into the same thing last year with my Firebird(of course this time I looked at the cheapest thing first...brakes)...might be worth a look.
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Kevin, 1969 912 1992 Firebird 1985 Eldorado(SS roof) 1992 Ranger PU 1976 Cutlass(tha beast) various others in the country for parts |
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11-26-2002, 06:35 AM
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Join Date: Nov 2001
Location: arlington,va USA
Posts: 180
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I have same thing, but its not that noticable. Maybe just the 'Nature of the beast'.
Brett
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PtCruiser 03burb 4Kids Best 356/912 Shop I found on the East Coast: TimBerardelli Racing 703.461.3436 Long and Gone: 610 Boss302 41coupe XKE 240z Sqback 2002 912 |
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11-26-2002, 11:25 AM
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Registered
Join Date: Oct 2001
Location: belgium
Posts: 39
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I had the car driven by two different car mechanics (VW and Porsche) and they both told me not to worry about it. A rebuilt gearbox always needs to be run in. With time things will improve.
I found the same comments in a gearbox rebuilt manual: ' a transmission , if realigned , will continue to howl when different wearing surfaces are presented to each other'. Thanks for the comments and ideas, 
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12-14-2002, 12:23 AM
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Registered
Join Date: Nov 2002
Location: Heath, TX
Posts: 82
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Grinders
Had a similar grinding noise in my 66. Warm, in gear slowing down. Turned out to be a very bad brake pad. Very cheap fix. Worth a try. Later DG
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12-15-2002, 10:57 AM
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Registered
Join Date: Aug 2000
Location: Corpus Christi, TX
Posts: 322
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check your brake pads ASAP. I just had the same thing happening to my 914 last week. I had assumed it was rust on the rotors (car not driven for 5 years). WRONG! one of my rear pads was gone. Only the metal backing plate was left.
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12-18-2002, 11:31 AM
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