B13, odd clunk noise

Wade Jackson srwadet at cox.net
Wed Jul 20 16:55:55 CDT 2011

Thanks for the comments.  I'm just going to leave that mount alone and hope that the remaining bolts do the job. I have a race at VIR this weekend so I don't want to tear things down right now.  Hopefully just replacing the passenger mount will fix the clunk.  I thought the car had upgraded mounts (sold to me that way).  However, I'm not so sure after looking at them.  It's amazing how much the engine moves around when you use the subframe brace as a jacking point!


---- George Roffe <geo31 at suddenlink.net> wrote: 
> I do believe we are talking about the mount at the firewall.
> If so: There is a bracket that attaches to the gearbox with 3 bolts of differing lengths. The engine mount is attached to the subframe brace and it slides up between the sides of the bracket. The bolt for this mount has a "pencil tip" end and threads into the bracket.
> If you're willing to deal with the PITA of trying to slip a bolt (without the pencil tip) through the hole left by drilling out the threads in the bracket, there is no reason you cannot use a nut and washer on the bracket.
> That said, Wayne is right, there must be so many spares lying around, just have someone mail you a bracket. Hell, I may even have one in my garage, but it would take me a year to find it and six months to mail it.
> Geo
> ---- Wade Jackson <srwadet at cox.net> wrote:
> =============
> I'm pretty sure it goes into the transmission. I have been told that you do not need all the bolts in that mount and some people run without that very hard to install/remove bolt. I think my problems are related to the passenger side mount where the metal collar surrounding the rubber is sliding inside the ring that attaches to the engine. I will try to install a new ES insert in there tonight.
> Wade
> ---- wc701lists at bellsouth.net wrote:
> > On 7/18/2011 8:28 AM, Wade Jackson wrote:
> > > My transmission just started doing this on my B13 race car after paying someone to change the clutch. Last night, I discovered that the firewall motor mount was not tight.
> > > I tried to tighten it but the 17-mm bolt appears to be stripped.
> >
> > I haven't taken one apart in years. I remember the bracket straddles
> > the rubber mount, and bolts up to the transmission. Does the bolt going
> > through the mount thread into the transmission, or threads on the bracket?
> >
> > If it's the bracket that is threaded, replace it. Should be someone
> > here with a cheap spare. If it threads into the tranny, that's a big
> > PITA. You probably have to do a helicoil to fix the threads.
> >
> > -Wayne
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