Hello Theo,
If I were you, I'd try to install a Heli-coil in the bad bolt hole. You can buy
a kit for
different sizes at most large auto stores. The process is to drill the hole a
littles
larger and use the tap supplied with the kit to tap the hole slightly larger.
You then
screw in a coil that looks like a spring and you are then back to the original,
desired
thread size, and it is just as strong as it was originally. Takes about and
hour.
Craig Wright
Theo Smit wrote:
> So this morning the seeping thermostat housing started leaking rather more
> vigorously. The reason for the seep in the first place is that the DPO
> crossthreaded the cr*p out of the lower thermostat housing bolt, and I was
> scared to tighten things too much when I installed the thermostat (there was
> none) after getting the car here. The lower bolt that is in there is a very
> mangled 5/16 UNC. The upper fastener is a 5/16 UNF stud. My objective is to
> clean out what's there and then put a stud in so I don't remove any more
>threads
> from the manifold.
>
> The $64000 question is, what thread was originally used on the F4B thermostat
> housing holes?
>
> Theo Smit
> tsmit@novatel.ca
> B382002705
--
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Craig Wright Product Design Group, Inc.
craig@p-d-g.com 4635 Viewridge Ave.
(619) 569-3484 x309 San Diego, CA 92123
fax: (619) 569-3490 http://www.p-d-g.com
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