(you guys say no thing as stupid question) As I'm about to mount the 235 on engine stand, I 'sized' the obvious bolt holes I'll be using - 3/8-16 goes part way in. I got out little thread gauge - unless it's wrong, these are 14 tpi. Is this right ? Do I need to find 3/8-14 bolts ?
I don't think there is a 3/8- 14 tread on any Stovebolts. Or that size was ever produced for anything. It is probably a 1/2-13 thread. When I mounted a 235 on the engine stand, I used 1/2-13 bolts. In fact, that is the only size bolt I have used, be it GM, Ford, or Chrysler.
No DB, there are no stupid questions on this site. If it saves someone some hurt or money, we are here to help!
Don
1967 GMC 9500 Fire Ladder Truck "The Flag Pole" In the Stovebolt Gallery '46 2-Ton grain truck | '50 2-ton flatbed | '54 Pontiac Straight Eight | '54 Plymouth Belvidere | '70 American LaFrance pumper fire truck | '76 Triumph TR-6 Of all the things I've lost in my life, I miss my mind the most!
The only bolt size with 14 pitch threads would be 7/16 inch. But those are fairly uncommon. It's unlikely you'd find that size at your local hardware store.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
I'll find out tomorrow, when I crawl under and pull an existing bolt. Don't really see a ½" fitting in there. It was 100º and I'm too old to crawl around in the heat.
The stovebolt bellhousing is attached to the block with 7/16-14 thread bolts. There's no way to get a 1/2" bolt to fit unless you drill and tap the block for bigger bolts. I just finished bolting the adapter for an engine stand to a 216 block, and 235's and 261's use the same bellhousing bolts as a 216.
Truck transmissions (SM-318 and SM-420) are bolted to the bell housing with 1/2-13 bolts.
Standard thread bolts (UNC) are as follows: 3/8-16 7/16-14 1/2-13
Fine thread bolts (UNF or SAE): 3/8-24 7/16-20 1/2-20
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Darn, I forgot about the 7/16-14 threads. Thanks for the reminder!
Don
1967 GMC 9500 Fire Ladder Truck "The Flag Pole" In the Stovebolt Gallery '46 2-Ton grain truck | '50 2-ton flatbed | '54 Pontiac Straight Eight | '54 Plymouth Belvidere | '70 American LaFrance pumper fire truck | '76 Triumph TR-6 Of all the things I've lost in my life, I miss my mind the most!
I'll find out tomorrow, when I crawl under and pull an existing bolt. Don't really see a ½" fitting in there. It was 100º and I'm too old to crawl around in the heat.
dbwr,
It was hot here today in Fort Collins. 100 yesterday, 99 today. Tuesday it's supposed to be a high of 34 and 4 inches of snow... Gotta love Colorado!
-David
1953 2-Ton GMC
I'm a machinist... because engineers need heroes too.
