[V8] Bumptey, Bumpety, Bump, Bump, Bump

[Dave Head]

also, if the engine mounts are getting soft the engine lowers and the 
exhaust can hit the cross member no matter how solidly mounted it is...
Of course, it will also do it under hard acceleration too.

Ingo Rautenberg wrote:
> Oh, right.  Al makes good points.  Eventually you find yourself replacing
> everything ;-)
> 
> On Sat, Dec 26, 2009 at 2:53 PM, 32VQUATTRO <ALLANVEGA at comcast.net> wrote:
> 
>> In order for a bad bump stop to be the culprit, the shock would have to
>> fully compress first. If your driving over known bumpy roads, I doubt you
>> driving fast enough to compress the shock fully (that is unless you beat on
>> your car ) What's more likely the problem, in my opinion, is a bad lower
>> control arm bushing, or camber link (in that order) The bushing I would look
>> at first, would be the most forward bushing on the lower control arm.
>> Depending on the year of your car, this will either have two or three bolts
>> going to the chassis and one bolt going through the bushing into the lower
>> control arm. Good luck. Al
>> ----- Original Message ----- From: "Ingo Rautenberg" <
>> ingo.rautenberg at gmail.com>
>> To: "Mark Kalbskopf" <gbmarc at cox.net>
>> Cc: <v8-bounces at audifans.com>; "V8List Fans" <v8 at audifans.com>
>> Sent: Saturday, December 26, 2009 1:42 PM
>> Subject: Re: [V8] Bumptey, Bumpety, Bump, Bump, Bump
>>
>>
>>
>>  Mark,
>>> This will get stripped on the list, but I've attached a PDF I made of the
>>> pertinent Family Album section: Main Group 5, Sub Group 5, illustration
>>> 48-10.  Bump stop is number 9, and that includes a (iirc) black cover and
>>> orange hard rubber bump stop, PN# 441 512 129
>>>
>>> Regards,
>>>
>>> Ingo
>>>
>>> On Sat, Dec 26, 2009 at 1:30 PM, Mark Kalbskopf <gbmarc at cox.net> wrote:
>>>
>>>  Ingo,
>>>> I don't see a rubber bump stop. At least nothing that looks like the one
>>>> in
>>>> the manual diagram 42-70-1. There's nothing visible around the shiny
>>>> piston
>>>> part either. If I remove what the manual calls the  'protective boot' and
>>>> 'protective cap' then I could possibly imagine the top 1/4" of something.
>>>> Should it be clearly visible?
>>>>
>>>> Mark.
>>>>
>>>>
>>>>
>>>> On Dec 26, 2009, at 12:53 PM, Ingo Rautenberg wrote:
>>>>
>>>>  Mark,
>>>>
>>>>> Couple things. Yes, could well be a blown shock. Or/and the rubber bump
>>>>> stop may well have disintegrated. Have you had any suspension work done
>>>>> on
>>>>> that side? If so it could also be something improperly-tightened/ loose.
>>>>> Another source for a noise like you are describing is either missing or
>>>>> failed rear differential mount (hard to see because it's above the diff
>>>>> iirc). That's all I can with of for now. Good luck.
>>>>>
>>>>> Ingo Rautenberg
>>>>>
>>>>> -----Original Message-----
>>>>> From: Mark Kalbskopf <gbmarc at cox.net>
>>>>> Date: Sat, 26 Dec 2009 12:46:07
>>>>> To: <v8 at audifans.com>
>>>>> Subject: [V8] Bumptey, Bumpety,  Bump, Bump, Bump
>>>>>
>>>>> While dashing thru the snow on my 254 horse old sleigh,
>>>>> I have this sporadic thump,  thump, thump from behind the rear LHS
>>>>> passenger as we go over the deeper holes..
>>>>> My road is like a rutted farm track with 'pot holes' in the snow down
>>>>> to the asphalt every so often.
>>>>> It sounds like something is hitting the body or almost like the Left
>>>>> rear suspension is bottoming out (hard to beleive)
>>>>> Everything is quiet once we're on smooth surface again.
>>>>>
>>>>> I have the car up in the air right now but can't see anything loose.
>>>>> The exhaust is very firmly attached.
>>>>> I have never changed the rear shocks in the 10 years I've had the
>>>>> car.  Could this simply be worn out shocks?
>>>>>
>>>>> Mark.
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>>>>>
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