What I have found through past experience is that with a solid copper head
gasket you want the protrusion on the low side of spec and maybe down to
.002" The reading you have is way too much for any of the current gaskets.
If I surface the top of the block, which is frequently needed I correct the
cylinder protrusion by taking off the required length from the seat of the
liners. I made a setup on my lathe to make this a fairly easy process since
I do a lot of these builds.
As far as the crankshaft.... Any reputable crank grinder will as part of the
process remove the plugs, grind the crank, thoroughly clean and reinstall
new plugs! If you find one that does not follow this process find a new
crankshaft grinder. I have noticed a number of decent crank grinders
closing shop these days. There are many reasons for this which are
understandable in today's economy and lack of engine rebuilds being
accomplished. If you do find a good crank grinder spread the word and help
these folks out. With the lack of work available and only being able to
charge about $250 for a grinding it is very hard to make money when their
machines cost around $50k or more.
Steve Yott
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of marty sukey
Sent: Wednesday, December 26, 2012 6:54 PM
To: FOT
Subject: [Fot] TR4 build questions
A little advice needed from the TR4 masses. On the engine I am working on
the liner protrusion is .008"/.009". Spec calls out .003"/.005". This is a
HP street engine. Block and head are freshly surfaced, new sleeves. Head
gasket is one of BFE's copper ones. The figure 8 gaskets are .016" steel and
could be probably be surface ground down to reach the .003"/.005" spec.
Question is, do I need to do this or is the extra protrusion ok?
Second question, After the crank is ground I am thinking I need to remove
the cross drilling plugs so that I can clean the internals out sufficiently.
It looks like this has been attempted sometime in the past as a couple of
the hex's are stripped out. Should I remove/replace these? I'm thinking they
will be challenging based upon some being stripped already.
Thanks,
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