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Old 08-26-2020, 08:11 AM   #9
GOSFAST
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Join Date: May 2010
Location: Long Island, NY
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Default Re: Engine Shop Expectations (Flathead 8ba)

You'll get a lot more replies before this thread is done, but I'll add this much:

Mandatory machining operations for the Flathead!

1-Pressure test block
2-Drill lifter bores (for valve adjusting, if in the program)
3-Finish hone bores with a block plate (extremely important today)
4-Balance ass'y
5-Mill decks flat (up to .010" max)

Optional machining procedures (recommended)

1-Drill/tap the extra intake manifold bolt holes
2-Install bronze-lined guides (w/stainless valves)
3-Install Viton valve stem seals (intakes only)
4-Oil filter modification (highly recommended)
5-Drill & pin heads to block
6-Install valve seats (if needed)
7-Hone lifter bores and valve guide bores
8-Pin cam gear to cam (for cam degreeing)

The final "tip" I would put here, make absolutely certain to run the finished build BEFORE it gets installed! One new rule recently set in place here is we will no longer do any complete assemblies without running the build in, either on a stand or on the dyno!

On a side note, change the oil pan dipstick adapter gasket, most times they are destroyed by age and hot-tanking the pans!

Thanks, Gary in N.Y.

P.S. If they can't block plate-hone it I would find another shop!
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