What the subject says- Is the lower alternator bolt a 3/8-16 or a M8x1.25? Need to know so i can pull it out and replace it with a 6.5" or 175ish mm bolt. Don't ask. The head feels real loose in a 9/16 so I'm thinking M8?

 

should be metric, very little sae stuff since early 80s

 

i know the body on our trucks are metric, I've dealt with both ends. Thought the motor was SAE though. Oh well, I have both bolts…guess I'll find out when i yank the old one out.

 

only sae bolts I have on my '05 are the exhaust bolts, was the same on my dad's '87

 

okiedoke!

 

It's gotta be 3/8" It's loose in a 9/16, but I can't fit a 17/32 on the bolt (which fits an M8 13mm head). Next bump up from 17/32 is 18/32 = 9/16. Or it could be a 14mm head, but those are only used on JIS (Japanese Industrial Standard) M10 bolts, which I can't see dodge having used. Plus 14mm works out to 8.8/16, which would be fairly snug in a 9/16 wrench. Then again, I would expect a 9/16 to be snug in a 9/16 wrench too.

 

From THIS DF POST, looks like a great bit of the front drive stuff is SAE, so I will try to get this front drive motor put on tomorrow. Hoping it's a 1 shot thing, I only have so many spacers.

 

mine had a bunch of 14 mm

 

Guess I'll find out when I yank the bolt tomorrow.

 

the main thing is that I can care less what wrench fits, I need to know what the threads are inside. Only way to find out is to yank the bolt.

Also, 14mm shouldn't exist. It is only used in JIS and our trucks aren't freaking japanese. Everythign should be 13 or 16mm.