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Philip Erickson Phone: (619) 622-7963
Associate Scientist
Medicinal Chemistry FAX: (619) 678-8277
Agouron Pharmaceuticals, Inc.
4215 Sorrento Valley Boulevard San Diego, CA 92121
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Content-Disposition: inline
Message-ID: <37306366.D91CC147@agouron.com>
Date: Wed, 05 May 1999 08:28:29 -0700
From: Philip Erickson <philip.erickson@agouron.com>
Reply-To: philip.erickson@agouron.com
X-Mailer: Mozilla 4.05 (Macintosh; U; PPC)
MIME-Version: 1.0
To: Todd Osborn <trosborn@california.com>
Subject: Re: no more vibrations - loose driveshaft
References: <39df171d.245e4df6@aol.com> <372E4E03.3E6F@california.com>
Jeff,
I have always been told that SAE grade 5 bolts (grade 8 for suspension) are
minimum for automotive general use. I had the same problem and replaced mine
with
fine thread grade 8.
Phil
Todd Osborn wrote:
> Jeff,
> I had the same problem when I first got my roadster (almost 25 years
> ago). I tightened the four bolts on the front driveshaft mount only to
> find them loose a few months later. The second time I cleaned things up
> real good and used loctite, but again found them loose. I finally
> replaced them with SAE grade 5 bolts and I have not had any problems
> since. I figure the original bolts (SAE grade 3 at best) were yielding
> and the small stretch allowed the bolts loosen up. I never experienced
> the vibration you mention though.
>
> I have a note taped to my tool box to check these bolts in the near
> future. I really don't want the front end of my driveshaft flailing
> around.
>
> Todd Osborn
> 68 2L, DATSFUN, San Jose, CA
>
> JeffnAly@aol.com wrote:
> >
> > Now for the rest of the story...
> >
> > My car loves to prove me wrong. As I started to remove the front drive
>shaft
> > bolts I found out all of them were very loose. This is again strange as the
> > motor, trany, and drive shaft have not been out for years. The previous
> > owner was the last one to do this type of work, and we both have made long
> > trips with the car.
> >
> > Getting to these bolts on a five speed can be a problem due to the proximity
> > of the cross member. The approach I took was doun through the hole for the
> > shifter boot. Some customized shortened wrenches helped.
> >
> > Now the car is back to its old self again!
> >
> > Jeff S SRL486
--
Philip Erickson Phone: (619) 622-7963
Associate Scientist
Medicinal Chemistry FAX: (619) 678-8277
Agouron Pharmaceuticals, Inc.
4215 Sorrento Valley Boulevard San Diego, CA 92121
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