Block preparation before machining.

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Topic author
ADP91
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First Name: Angus
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* REQUIRED* Type and Year of Model Ts owned: 1917 Model T Speedster
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Board Member Since: 2018

Block preparation before machining.

Post by ADP91 » Wed May 05, 2021 6:35 pm

Hello,

I am in the early stages of rebuilding my 1917 Model T engine and I'm looking for some advice for preparing my block for machining. I've disassembled it almost entirely and cleaned/degreased it well.

My question is: do I need to remove the crank and cam shafts prior to sending it away for decking, cylinder boring, and valve seats?

I think it is likely I will need to remove the crank (so metal chips don't get into the babbitt area..) but I am unsure about the camshaft.

Any advice is greatly appreciated!

Cheers,
A


John kuehn
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Re: Block preparation before machining.

Post by John kuehn » Wed May 05, 2021 6:46 pm

If I was getting machine work done I believe I would strip it all the way down. That’s what I did with the ones I had bored. If your removing the crankshaft the cam removal also is not that much more to do.


Topic author
ADP91
Posts: 8
Joined: Wed May 05, 2021 6:28 pm
First Name: Angus
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* REQUIRED* Type and Year of Model Ts owned: 1917 Model T Speedster
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Re: Block preparation before machining.

Post by ADP91 » Wed May 05, 2021 6:54 pm

Is there anything I need to be careful of when removing both shafts? I would definitely mark the timing gear position for reinstallation, anything else?

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JTT3
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Re: Block preparation before machining.

Post by JTT3 » Wed May 05, 2021 7:04 pm

The timing gear and crank gear are already factory marked but you can do that if you’d like.

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Mark Gregush
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Re: Block preparation before machining.

Post by Mark Gregush » Wed May 05, 2021 11:25 pm

Which Vancouver BC or WA?
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup


speedytinc
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Re: Block preparation before machining.

Post by speedytinc » Thu May 06, 2021 8:19 am

Make sure your rods & main caps are clearly marked for reassembly. Never notch rods. If someone before you has, grind them out. Be sure the builder doesnt hot tank it. Ruins babbit. Make it clear you want the babbit protected if you are not rebabbitting. Clean water jackets before sending out. When/if you have the crank ground, have both sides of the flange squared up. Rear side only if using old babbit.


Joe Bell
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Re: Block preparation before machining.

Post by Joe Bell » Thu May 06, 2021 5:43 pm

If the machine shop Hot tanks the block it ruins the babbitt.


Topic author
ADP91
Posts: 8
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First Name: Angus
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* REQUIRED* Type and Year of Model Ts owned: 1917 Model T Speedster
Location: Vancouver
Board Member Since: 2018

Re: Block preparation before machining.

Post by ADP91 » Thu May 06, 2021 9:13 pm

Thanks for the advice everyone!

Looking forward to getting a well-condition block from the machine shop.

I am in Vancouver, BC by the way.

Cheers

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