Re: thumping in rear end of UrQ

[John Karasaki <johkar@teleport.com>]

Been there, have that.  Only get rubbing if it is raining or if there is
water on the road!




At 06:25 PM 1/20/99 GMT, Phil Payne wrote:
>Michael Williams wrote:
>>
>> hey all, im worried now.  I was just driving my UrQ home, and took a few
>> turns spiritedly when i noticed that something was thumping
>> intermittently.  Well, i thought it might be the exhaust or something,
>> but then it became regular very quickly.  When i pulled onto my street i
>> turned off the car and let it coast to a stop, it was there, a
>> thump-thump-thump, not over bumps, but consistently, with the delay
>> lengthening as the speed dropped.  It didnt seem to change much when i
>> put on the brakes that i can remember.
>
>I remembered something else this might be - differential exhaust
>cooling.
>
>At one time, it used to happen to mine.  You need cold rain or slush
>on the road - the way the airflow under the car works leads to one side
>of the centre exhaust section being cooled more than the other, and the
>exhaust twists into the prop shaft.  If you let it cool down, the
>problem goes away.  Symptom is a bright spot on top of the exhaust
>pipe - fix is to re-align the exhaust.
>
>--
> Phil Payne
> Phone: 0385 302803   Fax: 01536 723021
> (The contents of this post will _NOT_ appear in the UK Newsletter.)
>
>
Best Regards,

John Karasaki
Portland, OR