Andy,
I have used helicoils on the F4B but only for the carburetor hold down
screws. I had the hole for the temp sensor welded then redrilled and tapped
to correct threads. You need a good machine shop that knows what they are
doing. They will have to drill the hole out with a cone drill. this will
leave a clean surface for then to weld to. Then they will fill the hole in
by welding it closed. Now they will drill a new hole and tap the new hole
with the correct tap. Clean up the mess and you are back in business. All
this for about $50 when I had it done a couple of years ago.
Dan
----- Original Message -----
From: "Andy Walker" <awtiger@ix.netcom.com>
To: "Tiger List" <tigers@autox.team.net>
Sent: Monday, September 03, 2001 6:51 PM
Subject: Messed up F4B
> Hey, all:
>
> I've got a problem that I hope does not become the demise of the Edelbrock
F4B
> intake on my Tiger. I currently have it removed from the car for some
other
> work. While I had it off, I bead blasted it and washed it down to make it
> look a little nicer. I also wanted to replace the temp sender while I was
at
> it. The problem is that, when I attempted to tighten the new sender unit,
the
> threads stripped in the intake with just the slightest amount of pressure
> being applied. The previous owner had installed a brass fitting with a
longer
> threaded neck into the intake and, of course, now I know why. Further
down
> into that hole on the intake, out of the reach of the temp sender, the
threads
> are okay.
>
> I have two questions. First, is it possible to successfully helicoil the
temp
> sender hole in the intake, knowing that it will be under constant temp and
> pressure loads while the engine is running? Secondly, if I must end up
using
> that extra brass fitting, will the temp sender give an honest reading
while
> inside the other brass fitting that I described earlier? As a side note,
when
> the temp sender is screwed down all the way into that brass fitting, the
> bottom of the sender is flush with the bottom of the fitting. I would
think
> both would be submerged in water, though. I have been running it like
that
> for many years, oblivious to the fact that the previous owner had it set
up
> like that.
>
> Thanks for any input that you guys may pass to me. I'm hoping to get the
car
> put together in a couple of days and this could potentially slow me down
for
> who knows how long.
>
> Thanks,
> Andy Walker
> B382001600
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