Chuck:
I just finished a very very long TR6 frame-up rebuild. The most important
thing I did from the bearing point of view (though not in the engine) was to
have the lay gear in the transmission bored and inserted the early caged
roller bearings in the hard shell. Then I replaced the piece of solder they
call the lay shaft with and industrial shaft. The thing is nothing but a
dowel will a small keeper chord cut in the end. In the middle and later
(mine is a 72 CC83K; someone else may have the exact CC-CF numbers of the
change) the rollers were running directly in the gear with no shell. The
metal of the gear is too pitiful to support the pressure. That stupid lay
shaft and gear are so soft that the bearings cut into them and eventually
the gear drops down and begins pouring bits of metal all over the
transmission. Overdrive and the rest are soon choked up and dead. Very
expensive lessons follow soon after. I understand that some shops put in
shell bearings on the shaft and claim greatly extended life. That is with
the original shafting. Personally, I wanted the reduced friction, so sprung
for the hard shaft to match up to the roller bearings.
cheers,
Mark
-----Original Message-----
From: Chuck Arnold [mailto:chuck.arnold@oracle.com]
Sent: Thursday, April 19, 2001 12:09 PM
To: 6pack@autox.team.net; Triumphs@autox.team.net
Subject: Can bearings and engine rebuild
Am having to rebuild the bottom end due to a spun rod bearing. In the
process I want to install a cam bearing. I am unclear as to the nature
of this bearing and where to obtain it:
Kastner states on from a Spitfire MArk III works, and lists part numbers
[I do not know what these numbers refer to as relates to our current
suppliers]. Moss has a specific part number for this at $120, which
seems very high given that Cambridge Motor Sports in Britain [an
expensive source of TR racing parts] sells them for 29 pounds.
My specific question is -- have any of you had your TR 6 engine line
bored and then installed cam bearings? If so, what bearings did you use
and where did you get them.
My next question regards all the plugs in the engine block. I am
thinking of removing all the ones associated with the oil journeys --
how are they removed, and how are they replaced.
Since this is a total engine out of the car experience [my first] are
there any watch out fors, really should dos, etc. Any links to web
sites with specifics on TR 6 rebuilds?
Finally, to Don Clark: Are you just not able to locate the part number
for the main bearing caps, or are Moss and TRF truly out of them? TRF
calls them HB1024 [page 21, item AH3]. The TR 6 workshop manual says to
always replace them [and the rod bolts also]. Where did you get your
rod bolts [I notice Moss sells an expensive set that I presume comes
from ARP -- I bought their head bolts a while back and that was there
vendor]. Have you tried Tacoma Screw?
Chuck Arnold
[demime 0.97c removed an attachment of type text/x-vcard which had a name of
chuck.arnold.vcf]
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