[Tigers] need some advice - non tiger

[Ron Fraser]

Owain
	The biggest problem with a steel bolt in an aluminum head is getting
the bolt really hot with the aluminum sucking the heat away.

I have come across a couple of solutions neither of which I have ever done
but maybe of promise.

Heat the bolt up well and let candle wax melt onto the bolt and into the
threads.  Wax supposedly works better than penetrating oil.

If there is enough bolt sticking out; weld a nut to it.  The heat from
welding will penetrate the bolt and the nut will give you something to turn.
You need welding equipment for this one.

Not sure if either of these are of any help to you.

Ron Fraser



-----Original Message-----
From: tigers-bounces at autox.team.net [mailto:tigers-bounces at autox.team.net]
On Behalf Of Owain Lloyd
Sent: Saturday, November 15, 2008 1:52 PM
To: tiger email list
Subject: [Tigers] need some advice - non tiger


ok guys - i'm consulting the tiger list because i know how much expertise is
here.  sorry if that irritates anyone!

i was changing the timing chains and tensioners on my jaguar XJR v8 when i
accidentally sheared a 6mm bolt that holds a water elbow to the heads.  the
bolt is steel - the head aluminum.  that was my first
mistake.   i tried penetrating oil, heat, shock, vice grips, cutting a
slot in it and nothing worked.  so i carefully got a centre punch in it
started drilling it out with a right angle drill attachment.  then came my
second big mistake...  the small drill bit snapped of about
halfway though.   now i've tried a larger bit and a masonry bit but
nothing budges this very thin bit.

my plan now it to get hold of some solid carbide bits and, taking it slow,
try and drill it out with that.  failing that i suppose i can tap a couple
of small threads on each side of it.

any advice before i make it even worse?
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