[doc] Re: Broken bolt and spinning bolt on the big internal waterpipe!

["nick12dmc" <Tammyfew@xxxxxxx>]

Hi Stian,
         Oh yes been there and sheared that bolt!
Ok you need to get hold of a small good quality drill bit
and a M7 Helicoil set.
 Remove the bolt that's just spinning its threaded, It should
just pull out with a pair of molegrips.
Then use the Helicoil set to repair that thread.
 Now use the small drill to put a pilot hole down the centre of
the broken bolt. This is tricky as it will tend to wander
into the block. Also do not drill to deep as you will be through
into the block!
 DO NOT BOTHER with a screw extractor as you will just shear off
and then your in real trouble as they are hardened.
 
 Once you have a pilot hole use the drill from the Helicoil set
to open the hole out and then use the kit to place the thread insert.

 New bolts can be aquired from Renault. 
Hope this helps
Regards
Nick H
-
-- In doc-uk@xxxxxxxxxxxxxxx, "Stian Birkeland" <delorean@xxxx> wrote:
> Hi folks,
> 
> Just a quick update on my current engine restoration.
> 
> I finally managed to get off the air intake manifold thanks to the 
> overwhelming friendly suggestions here on the list. Once again, 
> thanks everyone. Quality tools was the key here.
> 
> Yes, my assumption was correct - there was anti-freeze leak in 
> the "valley of death", small water pipe VERY RUSTY (check yours!!!)
> Apart from that, and the expected aluminium corrosion, everything 
> looked fine, and no signs of coolant eating through the aluminium 
> casting.
> 
> Then lightning struck...
> 
> I tried to remove the 4 bolts on the internal waterpipe (the big 
one 
> in the "valley of death".
> 
> 2 bolts got out ok, but the 3rd one broke, and the 4th is just 
> spinning round (like a record ;))
> 
> Of course the damn bolts seems to fasten to the block 
itself...aargh!
> What do I do now? 
> 
> Oh, and another thing to mention.
> 
> When I cleaned out the valley of death with a vacuum cleaner and 
> rags, I noticed that lots of what I thought was sand, indeed was 
> aluminium particles/powder. Maybe the aluminium corrosion itself 
can 
> cause engine fires - by means of temperature and aluminium dust...
> Better clean up your engine before its too late.
> 
> Just a thought...
> 
> Anyway - I need good advice now on how to get the bolts out.
> Has anyone "been there, done that"???
> 
> Best wishes
> Stian Birkeland
> Norway
> 
> VIN # 06759




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