[urq] Subframes bushings r&R procedure

[Martin Pajak]

I've had mine on the car for 3 winters now... (southern Ontario Salt mine... ;) and no problems or any signs of corrosion... don't know about 20 years from now but so far so good....
The way I drive I would probably have to replace a set of OEM bushings by now...
That's what happened to my rear diff tranny mounts... :(

Cheers
Martin

---------- Original Message ----------------------------------
From: Louis-Alain_Richard at computerhorizons.com
Date:  Fri, 24 Sep 2004 12:05:14 -0400

>You are probably right: the alu bushings have probably a good corrosion 
>resistance, but what I am reffering to is "galvanic corrosion".
>That is, when 2 parts of different metal are in contact together, the 
>lesser one (in the glavanic corosion chart) will gradually destroy itself 
>to protect the higher one if placed in an aggressive environment.
>
>I know this is highly theorical, but my experience with the aluminum 
>bumper supports (early GM full-size cars) under the chrome bumpers tell me 
>that indeed galvanic corrosion exists. Or try to pop-rivet a sheetmetal 
>floorboard with alu rivets; 2 winters and the rivets are loose...
>
>In this case, the alu bushing is the "sacrificial anode" between the steel 
>subframe and the steel chassis (exactly like the bumper support). 
>I know this problem will not show until many years from now, but I am sure 
>it will.
>This explanation is for the rational side of myself.:-)
>
>For the other side of my brain (the irrational): unlike many of you, who 
>would install improved or upgraded parts, I like the feeling of driving a 
>car "in its juice", with all the shortcomings typical of it's era. As an 
>example: If I buy an older MGA, and I want to do historic rallies with it, 
>I will do it the hard way, with drum brakes, no top, no windshield, open 
>exhaust and bias-ply tires.
>
>Call me a dreamer...
>
>Louis-Alain
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>Bob <bob at audisport.com> 
>2004-09-24 11:21
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>To
>Martin at quattro.ca
>cc
>Louis-Alain_Richard at computerhorizons.com, urq at audifans.com
>Subject
>Re: [urq] Subframes bushings r&R procedure
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>Actually the ones I got were an alloy and arent supposed to corrode (but 
>we will just see about that this winter!)
>Bob
>
>Martin Pajak wrote:
>
>>Louis-Alain,
>>
>>I can't agree with you on this one...
>>Rubber will deteriorate much quicker in salt than aluminium... also, if 
>you get the aluminium anodised you should have no corrosion problems.
>>
>>Again, there is no harshness... remember I live in Toronto... I've been 
>to Montreal and your roads are no worse then ours...
>>
>>Anyhoo... your choice.
>>
>>Cheers
>>Martin
>>---------- Original Message ----------------------------------
>>From: Louis-Alain_Richard at computerhorizons.com
>>Date:  Fri, 24 Sep 2004 10:16:43 -0400
>>
>> 
>>
>>>Thanks Martin and Bob, but I will stick to the OEM rubber bushings, for 
>>>two reasons:
>>>- corrosion (my car is winter driven, aren't Quattro the "King of the 
>>>snow"?). IMO, alu and steel are not compatible in a salty 
>environnement...
>>>- harshness, even if everybody say that I won't know the difference, I 
>>>live in Montreal, a city where the roads make Bagdad's look like a 
>>>racetrack...
>>>
>>>Since I am going to France tomorrow, I will take the offer from Ado and 
>>>grab a set from him.
>>>
>>>Thanks anyway,
>>>
>>>Louis-Alain
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