Date: Sat, 18 Sep 2010 19:48:16 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Motor mount broken bolt 84GL manual 4 speed
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the one broke off because the others were loose.
It's a classic common issue .
the only way I would tackle it is drill out the bolt.
Drill it right on center with a small drill bit, like 1/8th.
then drill bigger and bigger heading toward the right size to tap it.
with luck, the thin shell left in the threads will just fall out when the
bolt is really thin..like mostly drilled out.
if you need to, then tap it.
I have never gotten an easy out to work, or almost never.
usually they are either tightened in well, or corroded in.
Might as well try some 'unscrew methods' ...I wouldn't invest much energy
there though ..
just get real patient, get some good drill bits - cobalts are brittle ,
don't use those ..a good High Speed Steel bit, and drill at a lowish speed.
that works for me, for sure.
might take an hour ,
and gettting the hole started dead center is a trick..
but as you start driling that hole, you can't 'walk' it around some, where
it is drilling , by tilting the drill ..get it dead on center .
then the rest is not bad.
make yourself some nice working room if you can ..so it's not a struggle. ,
like get other stuff out of the way.
new bolts are a fine idea.
I would install them with something on the threads ..
teflon paste, like pipe joint compound is good ..
prevents corrosion, sticks 'em in a bit.
Permatex high tack gasket sealer works too. Wouldn't lock tite them though,
at least not with super strong grade.
I torque 'em in pretty good ..
guessing 50 ft lbs. or so.
there are vanagons with this syndrome. It's not that uncommon.
scott
www.turbovans.com
----- Original Message -----
From: "william greenamyer" <wgreenamyer@CISO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, September 18, 2010 7:21 PM
Subject: Motor mount broken bolt 84GL manual 4 speed
>I have started the process of changing the motor mounts. I came across a
> couple of interesting. Most everything seemed to be together however
> there
> were a couple of loose bolts. Looking at the pully end of the engine, the
> top driver side bolt and the bottom center bolt which connect the mount
> assembly to the engine were not all the way in. Further investigation
> showed that the top bolt was broken and the bottom bolt was just loose.
> The
> bolt is broken just below the surface of the motor by about 1/16 inch.
> The
> same bolt on the passenger side was not hard to back out. As it stands
> right now, I will have to remove the cat and muffler to get in and do the
> drill work to remove the bolt end unless someone might have a better
> suggestion. Don't yet know how tight this end of the bolt is in the
> block.
> Might be able to Dremel a slot in it and it might back out since there is
> no
> stress on it. Not sure if I can get a cutoff wheel in there yet. The
> other
> option as it stands right now is to drill a hole and use a bolt extracter.
> If anyone has experience with this, I would like to hear from them. Based
> on the broken bolt, I would probably get some new bolts. I am guessing
> that
> these were not either properly tightened or there was such a jerk on the
> engine that it broke the one bolt.
>
> William
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