Considering your intended use and driving habits -- leave the engine alone,
do nothing more than check the torque of rod & main bolts and continue on
with the rest of the assembly. Put most of your effort into cleaning up the
intake & exhaust ports and matching the openings between the block and
manifolds.
Larry Qu.
----- Original Message -----
From: "Bill Gingerich" <wrgingerich@email.msn.com>
To: "Spitlist" <spitfires@autox.team.net>
Sent: Monday, March 04, 2002 5:12 PM
Subject: Oil passage modifications
> Greetings, Fellow Listers,
>
> After a 9 month period of Triumph inactivity, I am finally preparing to
finish
> the engine rebuild on my '74 Spit. I had the shop assemble the engine to
> short block status, but forgot to have them modify the oil lines as
> recommended in the competition prep manual. Now I get to do it all over
> again. So here is the question for you engine builders out there. I'm
> confused by the description of which lines to drill out. I'm assuming
that
> one is the main galley that runs lengthwise through the block. What are
the
> others? I haven't torn the engine down again (unheated Minnesota garage)
so
> I'm not able to get a visual reference. Are the oil lines something that
I, a
> reasonably experienced amateur gearhead, can modify? Obviously, after
> drilling and deburring I'll have to have the block tanked. I bought new
main
> and rod bolts for the rebuild - can I reuse the torque-to-yield rod bolts,
> since the engine hasn't run yet?
>
> The book also mentions several other modification i.e.: Radiusing the
holes in
> the main caps, putting longer grade 8 bolts in the center main cap,
counter
> boring the center main cap, etc. Are these other mods needed for a street
> motor? I rarely rev it past 4500, and not past 5000. FYI, the block is
bored
> .020 over with 9:1 pistons. Unknown carbs, a 4-2-1 header and an oil
cooler
> are the only other mods planned for the future.
>
> TIA, as always!
>
> BillG
> '74 Spit a.k.a. FrankenSpit (yes, I know others are using the same name)
> '73 Spit a.k.a. Rip Van Spitfire (still sleeping)
> '71 GT6 a.k.a. Dorian 'Primer' Grey (awaiting work this summer, and a new
> portrait)
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