re. Splitting the IM on an '89 100q

[mike mcclurg]

Thanks to Huw, Tom and Ben for the tips.
I had thought of the trick with the 1/4” allen wrench,
but did not have to resort to it since the two I tried
did come “loose” with the 6mm. That is, there was no
slippage of the wrench, just that the bolt apparently
popped loose, but then was not really loose. 
I will try getting to the threaded ends with some
liquid wrench and see if that helps. As I recall, the
threaded ends of the bolts actually do protrude from
the bottom half of the IM. Sort of against gravity,
but I’ll try to direct the spray up.

Thanks,
Mike

--- "Swann, Benjamin R.  (BSWANN)" <BSWANN at arinc.com>
wrote:
> <
> <snip> This car has the NFengine with an intake
> manifold that wraps around
> to
> the top of the engine, covering the valve cover, but
> contains a horizontal
> split.
> <snip> I'm thinking that I can just split the top
> half off the IM on my NF
> engine and then remove the valve cover to do the
> gasket. Is this right? [
> --> YES]
> 
> Is there some trick or magic elixir that must be
> applied. [ --> YES]
> >
> What I have found works reasonably well when you
> feel the bolt is not going
> to come loose before rounding out the allen head is
> to use a 1/4" allen
> which is slightly larger than 6mm.
> 
> I then have been able to hammer the allen in and
> then can apply enough force
> to break the bolt loose.  They generally gives way
> with a starling crack
> sound and then often are finger tight at that point.
>  This has saved me
> several times from making removal next to
> impossible, which is what happens
> if you continue applying more force with the 6mm.  
> 
> You may sacrifice a 1/4" allen for each difficult
> bolt(I have usually been
> able to get them back out), but is sure beats
> rounding them out.
> 
> Make sure you have soaked bolt threads(if exposed),
> etc. with liquid wrench
> as your first course of action.
> 
> Regards,
> 
> Ben Swann
> Just went throught this on both '89 100 Q and 87 GTQ
> 2.3l manifold.
> 


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