URGENT: 10v head (NF) broken! What to do?

[Jim Green]

--- Richard Hoffman <billzcat1 at hotmail.com> wrote:
> Hello all!
> I'm in a bit of a pickle.
> 
> Building an NF motor, 2.3L 10v.   Head was rebuilt
> by a
> not-as-competant-as-I'd-like machinist but it was
> just a valve guides/stem
> seals/one angle valve job.  The cam has .020"
> runout.  New aftermarket
> lifters (from Rob at TPC). .005" milled as well.
> 
> The problem: when torquing the cam caps down, the
> rear-most cam cap broke in
> half with a nice little *pop* and at the same time
> one stud broke the cam
> tower with 3 radial cracks. The cam was being
> torqued evenly across the head
> when it cracked, and it was still about 1/8" from
> being tight.  I've heard
> of cam caps cracking when they are finally torqued,
> but never so far from
> the head before.

Holly crap!  I've never seen that!  It sounds like the
cam caps were backwards when you put them on?  As far
as the head bolts, I hate those stupid things for this
exact reason.  They really should not be re-used once
torqued.  For under $100 you can get ARP head studs
from Summit and never have to worry again.  A line
bore can't be that much can it?  So you'd need a new
cap, head STUDS:), HG, and a line bore.

Now, everyone, buy some short shifters from Richard so
he can fix his car!  I have one and my car runs 12.7
quarters mile times, all thanks to the Billzcat short
shifter kit.  Ok, well, it had something to do with
it.


=====
Jim Green
'89 90tq
'89 80q
http://www.mswanson.com/~jgreen/car_home.html


	
		
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