I have been in contact with Kas and Glen Lund and upon re-checking and better
measuring I think I have 0.0045 to 0.0060 with one "corner" on one sleeve at
0.007, if I believe the reading. Most readings are 0.004 and 0.005. I
checked every 90 degrees on the top of the sleeve.
----- Original Message -----
From: Larry Young
To: Tim Murphy
Cc: 'FOT'
Sent: Thursday, July 03, 2008 1:57 PM
Subject: Re: [Fot] Fw: Liner Protrusion?
No one seems to be answering the question, so I'll give my opinion even
though I have less experience than most. I would not go with 0.002. I think
more is better than less. With too much protrusion you should get sealing on
the liners, but have a chance of not sealing elsewhere on the head. I like to
use high temp RTV on the deck of the block (not on the liners), since it
should fill a bigger space.
I think some of us end up using the wrong protrusion because figure 8
gaskets are not readily available in different thicknesses. I have a fairly
simple way to make figure 8 gaskets from shim stock. I can post some pictures
if anyone is interested.
Larry Young
Tim Murphy wrote:
----- Original Message -----
From: "Tim Murphy" <timmurph@fastbytes.com>
To: <rikrock@aol.com>
Sent: Tuesday, July 01, 2008 3:14 PM
Subject: Re: [Fot] Liner Protrusion?
I'm just in the process of doing this myself on a TR4 motor. The
protrusion that I have with the stock figure 8's is:
#1 Manifold side 0.002 Camshaft side 0.005
#2 Manifold side 0.002 Camshaft side 0.004
#3 Manifold side 0.002 Camshaft side 0.004
#4 Manifold side 0.004 Camshaft side 0.005
I'm using the composite (Payen) head gasket. I'll use either Permatex
Aircraft Form-a-Gasket or Permatex Indian Head Gasket Shellac, whichever
feels and looks thinner at the time.
Note that on the figure 8 gaskets I found a little burr on the edge from
the dies when they are stamped out. I stoned the gaskets and this reduced
the protrusion by about 0.002 inch. I made the measurements with the
sleeve clamped in to the block on opposite sides with washers, spacers and
the head nuts (had to use toe clamps from the milling machine to reach #2
and #3). Prior to clamping and measuring I did "seat" the sleeves per
Kas's book. I haven't measured the thickness of the figure 8's, just
measured protrusion. Did mark all sleeves for bore hole and direction of
insertion as well as marking figure 8's and position in block bores. Also
cleaned the block "seat" by wire brushing, emery cloth and then cleaned
with lacquer thinner.
Tim
1961 TR4 #317
----- Original Message -----
From: <rikrock@aol.com>
To: <fot@autox.team.net>
Sent: Tuesday, July 01, 2008 2:21 PM
Subject: [Fot] Liner Protrusion?
Amici,
I'm building a new TR4 motor.? Planning to use a steel shim headgasket.?
Along with the shaved head, compression ratio will be aprrox. 11:1.
With the new 89mm liners clamped down lightly on top of dry figure 8
gaskets which measure .0145" thick, cylinders 1, 2, and 3
liner?protrusion measures between .003" and .004".? Cylinder #4
protrusion measures between .005" and .006".? My question is.... what are
the chances the steel shim headgasket? will seal properly with these
heights and variation?
Further, what do you like to use for sealer on the (steel) figure 8's and
steel shim gaskets?
Thanks!
Rich Rock
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