[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

frozen crankshaft sprocket bolt (now pg-13)



The Bentley (old one) says:
1980, 1981, 1982 M12 bolt installed with Loctice 59 ft. lb
1983, 1984 M14 bolt lubricated by oil 148 ft. lb.

This is why you are having fun removing this bolt.

BTW, you had better follow these specifications upon reinstalling, or your
crankshaft will be toast. Ask me how I know. The bolt loosens up, the
sprocket keyway will snap, and the cranckshaft end where the keyway fits
becomes a bit larger and the next sprocket will fit loose. Then you are
screwed.

Cheers.

Marc
'83 Scirocco
'88 Scirocco Slegato

-----Message d'origine-----
De : scirocco-l-bounces@scirocco.org
[mailto:scirocco-l-bounces@scirocco.org]De la part de Ron Pieper
Envoye : mercredi 3 septembre 2003 11:18
A : Dan Bubb; Anson Clement; scirocco-l@scirocco.org
Objet : Re: frozen crankshaft sprocket bolt (now pg-13)


Na...

Heat expands stuff...the bolt gets bigger, BUT so does the hole.  And, since
the threaded hole is
a bit bigger than the bolt, it WILL become looser.

And the heat serves but burn dirt, rust etc. which helps too.

Larry will confirm this, I'm sure.

Ron


--- Dan Bubb <jdbubb@ix.netcom.com> wrote:
> So, far Anson has THE BEST reply to the frozen crankshaft bolt question!
> Graphic! But, clearly the most original!
>
> ----- Original Message -----
> From: "Anson Clement" <ansonivan@yahoo.com>
> To: <scirocco-l@scirocco.org>
> Sent: Wednesday, September 03, 2003 7:59 AM
> Subject: Re: frozen crankshaft sprocket bolt (now pg-13)
>
>
> > Holy crap guy! Will you stop heating the bolt already? Heat causes
> expansion yes? so in effect you are making a bad situation badder.... or
is
> that worser..... whatever.
> >
> > What you described is similar to sticking your willy in a milk jug (or
for
> those less blessed, a beer bottle) and watching footage of britney spears
> make out with madona..... yea I guess that might not work for some.... but
> anyways you get the idea..... willy swell no come out of bottle.
> >
> > Where was I? ......
> >
> > Anson
> >
> > Dave <droe@accesscom.com> wrote:
> > There are lots of great "stuck crankshaft sprocket bolt" solutions
> available on this site especially the "crankshaft seal fun!" threads, and
> believe me, I tried each and every one, but I cannot get the motherf.uh, I
> mean, the gosh darn thing off!
> >
> >
> >
> > Its a 1984 'rocco with a 1.8.
> >
> >
> >
> > Here's what I've tried so far, each of them with and without liberal
> applications of heat and blood.
> >
> >
> >
> > 1. Factory stock breaker bar, oil pan off and crankshaft locked with a
> block of wood between crank counterweights and the side of the engine
block
> (the side closest to the front-end). Heated bolt for about 10 minutes with
> MAPP gas.
> >
> >
> >
> > RESULTS: Splintered wood, amused neighbors.
> >
> >
> >
> > 2. Modifed breaker bar (6 foot galvanized pipe cheater bar, powder
coated
> blue, poly thread caps, etc.) and also an upgrade kit for the piece of
wood
> which consisted of a lead dead-blow hammer. The hammer's head fit
perfectly
> sideways against the counterweights and the side of the block. The breaker
> bar affair was braced with jackstands where the socket met the bolt and
> where the breaker bar met the socket. The bolt was again heated. I leaned
> about 90 pounds on the end of the 6 foot bar, generating about 500 ft-lbs.
> of torque.
> >
> >
> >
> > RESULTS: Thankfully, nothing. I was unsure of the amount of force
required
> to crack the block, and chickened out at 500 ft-lbs. Should I just go for
> this? With a friend or two, I could easily put a few ft.-tons on the bolt.
> Its not my car, so I'm a little paranoid.
> >
> >
> >
> > 3. Breaker bar on the bolt and bump the starter..
> >
> >
> >
> > RESULTS: Nothing. Stopped the starter dead in it's tracks.
> >
> >
> >
> > 4. Jack up the car and then lower its weight on to the bolt via the
> breaker bar. Heated the bolt.
> >
> >
> >
> > RESULTS: Nothing. Engine began to lift unpleasantly.
> >
> >
> >
> > 5. Pound on the breaker bar (again braced with the jackstands) using a
> sledgehammer. Heated the f****ng bolt.
> >
> >
> >
> > RESULTS: Nothing, and this one really felt like it was working.
> >
> >
> >
> > 6. Impact wrench. Heated the bolt. This was a normal sized gun that
> probably didn't have a hell of a lot of torque, but did break a cheapo
> non-impact socket.
> >
> >
> >
> > RESULTS: Nothing, but at least that socket won't be busting anyones
> knuckles. I might go rent a bigger gun (and use a proper impact socket) if
I
> can find a place that'll rent one.
> >
> >
> >
> > Anyways, there you go. I am totally open to any comments, flames, or
death
> threats regarding this problem. Again, when I say I heated the bolt, I
mean
> for about 10 minutes with MAPP gas. Perhaps it needs more?
(Oxy-Acetylene?)
> Thanks man!
> >
> >
> >
> > --Dave
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
> > ---------------------------------
> > Do you Yahoo!?
> > SBC Yahoo! DSL - Now only $29.95 per month!
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
>
>
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com

_______________________________________________
Scirocco-l mailing list
Scirocco-l@scirocco.org
http://neubayern.net/mailman/listinfo/scirocco-l