The Stovebolt Site Forums The Shop Area Engine Shop 292 Alternator Will Not Line Up With Water Pump and Damper

I am piecing together a 292 in a 66 C-10. The double groove damper and water pump pulley align perfectly. I am certain they are both correct. This is the damper that has about 1/2" space aft. The alternator is not lining up with them. I am using an alternator bracket that came off a 250. My question is...was there a unique alternator bracket for the 292 that would move the alternator farther forward 1/2"? Or was there a different pulley with an extra 1/2" spacing that accomplished this?

you'll have to make a crankcase bracket to move the alt forward. mine is 3/8'' plate 2''x6'' w/ 4 hole threaded into it
it's no big deal really

I am trying for an all original setup. Trying to figure out what it looked like out of the factory.

If memory serves me correctly, the original alternator had a pulley that the groove for the v belt was about a belt thickness further away from the alternator than most are. I used to work on 292's in school busses years ago, and if an alternator went out, I always wound up changing the pulley to make it line up.

Thanks Roy. So the mounting bracket I am using from a 250 is probably usable and not the problem? Guess I need to locate a correct pulley then.

chances are the 250 pulley is for a 250 and may not work correctly for a 292

The 292 used a cast iron lower bracket. It was spaced different than the 250. The pulley also was spaced out like Roy stated. 75 up used the narrow belt.

Thanks Wrenchbender. I have a cast iron lower bracket, but I assumed it wasn't correct since I couldn't get the alternator to align with the other pulleys. So unless there is more than one type of cast iron bracket that was used, then I probably have the right one. If anyone has a lead on the correct pulley I would appreciate it.

I have installed the alternator using the lower cast iron bracket. Where does the upper bracket attach to the block? There are no holes for it, except to use one of the water pump bolts, but even that doesn't really sit right. Is this correct?

It goes in one of the water pump bolts but I think it is different than the 250. Be shure & use a longer bolt preferably grade 8.

Thanks to a number of Stovebolters, here is the complete answer for anyone who may encounter this problem in the future...

The correct alternator bracket is cast iron, and has cast number 3831195. This bracket will provide a more forward offset than the stamped, spot welded bracket probably found an a 230/250. Additionally, the OEM 292 uses a unique alternator pulley that has about an extra 1/2" of spacing forward from the alternator fan. If you do not have this pulley, and simply purchase a rebuilt OEM alternator from a local parts store (#7122 in my neighborhood), it will not come out of the box with the right pulley. A special note of thanks to Mr. Larry G. in Oakdale, CA for hooking me up with that pulley. Everything lines up perfectly now, with all OEM parts, just the way it rolled out of the Fremont plant on 9-15-65.