Hi Jon,
I did contemplate using a helicoil kit but I thought these were to
create a thread of the same diameter as the hole. My problem required me
to create a thread of much smaller diameter than the hole that I'd made
by extracting the broken stud - I'm not sure though as I've never used
one of those kits before.
Maybe it would have been an easier fix?
Thanks, and if I need to just fix a stripped thread, I'll definitely
invest in a helicoil kit .
Cheers,
Keith
On 20/04/2013 23:19, jon jackson wrote:
Very good Keith and indeed the problem has been solved however you
could always use a helicoil thread insert to reinstate the original
thread which is a method Rolls Royce use as standard on some alloy
castings because its better.
cheers Jon
----- Original Message -----
*From:* Keith Joseph <mailto:ksj.mob...@gmail.com>
*To:* quantumowners@googlegroups.com
<mailto:quantumowners@googlegroups.com>
*Sent:* Saturday, April 20, 2013 9:19 PM
*Subject:* [Quantum Owners] 2+2 Engines - Update (If anyone's
interested!)
Following on from my previous message regarding the snapped
thermostat housing stud and broken stud extractor, I thought I
might as well have a go at drilling it and the snapped stud out of
the head.
After a couple of snapped drill bits, lots of swearing and a load
of aluminium shrapnel, the offending articles were successfully
extracted from the head. This did leave a hole though which was
considerably bigger than the original bolt hole which presented my
next problem.
By now, I'd gone past the point of no return, so I decided to use
a tap in the hole to create a decent thread. The next problem I
faced was the fact that the bolt which was going to fit this hole
was too big to go through the holes in the thermostat housing.
Even if I made the holes bigger in the housing, there still
wouldn't have been enough room to do up a bolt as the head of the
bolt would have clashed with the side of the thermostat housing.
I then had a brain wave!
If I could manufacture a stud which was two different diameters, I
could thread each end with different size die's -
One which would fit into the head, the other which would fit
through the holes in the housing and leave enough room to get a
nut on to secure the housing in place.
I've attached pictures of the stages I went through to create the
studs.
Once I'd finished them, I cut a small slice in the narrow end of
the stud, just to allow the head of a flat screw driver to fit in
so as to help tighten the studs into the head (I left the die on
the thread so that after cutting the slots I could clean up the
threads so that the nuts would fit back on cleanly).
I made two of these studs as I had to drill two of the three holes
in the head - the original aluminium threads just seam
to disintegrate. I'm very pleased to say that the studs fitted
snugly into the head and that the thermostat housing has been
re-attached, the system filled with water and pressurised and no
leaks so far. Very re-leaved!
Cheers to everyone who has offered advice and help,
Keith
On Saturday, 13 April 2013 17:48:50 UTC+1, Keith Joseph wrote:
Does anyone know what engines, apart from the standard 1.6
CVH, will fit onto the mk2 XR2 gearbox in my 2+2?
I've managed to shear off one of the bolts holding the
thermostat housing into the head and after attempting to
remove the remainder of the bolt, I've snapped the stud
extractor within the sheered bolt! Also a couple of other bolt
holes have stripped so I think the head has seen better days,
even tough it was reconditioned only 21,000 miles ago, as was
the full engine.
Ideally, I want to take the whole engine out and drop in a
complete replacement, preferably something with a bit more
power that the standard 1.6 CVH - If anyone has something
lying around in the back of their garage that they want rid
of, please let me know :-)
Cheers,
Keith
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