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What did you get done on your Bolt today? - 2021 and later
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Stovebolt driving report
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Who uses their truck as a truck - 2021 and later

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#598173 Fri Dec 04 2009 03:11 PM
Joined: Dec 2008
Posts: 1,840
panic Offline OP
Someone asserted (elsewhere) that the same "freeze" plug is used on all stovebolt (216, 235, 261) and GMC (248, 270, 302) engines.
I don't have access to GMC, but based on the photos the GMC are smaller.

I suspect both are something common, like other GM of the same age, but...?

Does anyone have the modern part numbers, source, or actual size for either one?

Joined: Jul 2001
Posts: 3,904
Master Gabster
expansion plug sizes will be listed here for each engine ... they'll be 'common' to the range of sizes available at any parts store, not identical for every GM engine


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot
Joined: Sep 2001
Posts: 31,731
Bubba - Curmudgeon
Here's the 1954 entries at Bill's link -

"free plugs" "freeze out plus" "expansion plugs" "core plugs" - block casting plugs.

Tim []
1954 3106 Carryall Suburban [] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. []
Joined: Dec 2008
Posts: 1,840
panic Offline OP
Cool, found it, thanks.

Moderated by  Phak1, Woogeroo 

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