How 'interference' are the 12v engines?

Tony Hoffman auditony at gmail.com
Mon Mar 30 10:14:46 PDT 2009


Tom,

I understand completely, I've done some pretty interesting things
myself over the years. Thankfully, they were all on my own cars!

I'd say you have a 50/50 chance of having bent valves. The easiest way
to check is to pull the valve covers and see if there is any
significant clearance between the cams and the lifters.

If they look tight, put it all back together and you should be good to
go. That's the same method I've used in shops for years, and only once
did it fail me, out of probably 50 or so times. And, that once was
slight, the car ended up with a slightly rough idle, nothing else. The
valve was just barely bent, 110 compression in that cylinder, 150 in
the other three.

If you did bend them, 12V engines seem to be pretty cheap out there,
as well as their parts.

As for the head bolt tool, if it's the same as the 30V's, it's sort of
like a torx, but the teeth are square, as opposed to tapered like a
torx. I have one of them, it's a Hazet tool. You cam probably get one
off ebay if you need.

Tony

>
> Any thoughts?  Similar unsavory experiences?  Spare AFC heads  (cheap) for
> sale?
>
> Also, does anybody know what tool I need to loosen the head bolts?   They
> appear to have a 6-point torx-like pattern on the top of the bolt (male  end) so
> that the correct socket would be a female torx-like apparatus.
>
> Thanks,
>
> Tom


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