Huh? Scratching My Head On This One

[keithb7]

Putting my engine back together. Same fan and pulley that I took off it. Same water pump. Generator too.  The generator pulley lines up with crank pulley. Yet my fan pulley belt groove sets about 1/4” out of of line. It sits closer to the engine block.  I don’t recall a spacer behind the pulley hub to move it forward 1/4”.  Weird. Nothing shown in the parts book. I could put some washers behind pulley for draw it toward rad 1/4”.  Scratching my head. Hmm. Wondering why?   What have I done? Lol. 
 

 

[KevinF77]

Generator goes on the other side of the bracket? Crank pulley not pulled all the way on? Just guesses. Enjoy the YouTube channel, btw. 

[keithb7]

Thanks Kevin.  I found some old photos I took before disassembly. Its reassembled the same as before. Generator on front side of bracket. I reassembled again here now. It’s more like 1/8” not 1/4”. I must not have noticed it before.  It’s not a big variance. I’ll keep an eye on it. 
 

Generator and crank pulley like up perfectly. 

I seem to recall the belt drive on the horizontal 6 Corvair engine. Holy moly it certainly has twists in it.  My deflection is pretty minute by comparison. 
 

Edited December 20, 2021 by keithb7

[keithb7]

[RobertKB]

There were factory spacers used to help line up the water pump pulley with the others. Four holes drilled for the bolts to go through. I have used them but can’t remember which car(s).   Not even sure if I have spares and even less sure where they might be. 

[Bryan]

If you changed the water pump is there a chance it is different than the old?

[keithb7]

2 minutes ago, RobertKB said:

There were factory spacers used to help line up the water pump pulley with the others. Four holes drilled for the bolts to go through. I have used them but can’t remember which car(s).   Not even sure if I have spares and even less sure where they might be. 

 

Betchya you are right Robert. I figured someone here may have seen spacers on the back side of the pulley. I have never seen that. Perhaps I will make one.

[keithb7]

 

Just now, Bryan said:

If you changed the water pump is there a chance it is different than the old?

 

Same water pump. Was new and I installed it Summer of 2020.

[RobertKB]

I wouldn’t be too worried if only 1/8”. 

[Bryan]

Looks more than an 1/8". It's such an easy fix I'd go with washers/spacers and get it perfect.

[Bryan]

Just thought about it. Those exhaust manifold washers I took off were pretty thick. If you had some of those..

[later]

51 minutes ago, keithb7 said:

Thanks Kevin.  I found some old photos I took before disassembly. Its reassembled the same as before. Generator on front side of bracket. I reassembled again here now. It’s more like 1/8” not 1/4”. I must not have noticed it before.  It’s not a big variance. I’ll keep an eye on it. 
 

Generator and crank pulley like up perfectly. 

I seem to recall the belt drive on the horizontal 6 Corvair engine. Holy moly it certainly has twists in it.  My deflection is pretty minute by comparison. 
 

I look at this and it seems that the generator is not in alignment. May be an illusion but the fan on the generator is at an angle with the water pump pulley. Just my opinion.

[keithb7]

The photo is making it appear that way. The generator is not on an angle. The gen pulley and fan turn true.  i was experimenting with odd camera angles to try and showcase the belt deflection. The photo makes the generator pulley look skewed I agree. In reality it is not.

[TodFitch]

48 minutes ago, Bryan said:

Just thought about it. Those exhaust manifold washers I took off were pretty thick. If you had some of those..

Seems like some washers behind the water pump pulley would be the answer.

 

FWIW, I misplaced the large washers used on the exhaust manifold and ended up making some from some appropriate sized bar stock from the local big box building supply. Turns out I found the original washers later. But a drill press, a metal cutting hole saw, and some readily available steel stock is all you need to make a range of hard to find washers. If you are a bit more skilled than I you could probably do it with a plain old electric drill.

[Dodgeb4ya]

This is the correct spacer item and what to use to space out the fan and pulley.

[keithb7]

2 minutes ago, Dodgeb4ya said:

This is the correct spacer item and what to use to space out the fan and pulley.

Aha!  Thank you. Love this place. So much great info. 

[RobertKB]

Yup, that’s exactly what my spacers that I used looked like. I’m going to have a better look to see if I can find one or two. I just can’t remember where. I’ll get in touch if any luck. 

[Dodgeb4ya]

The spacer is .186" thick.

Edited December 21, 2021 by Dodgeb4ya
Spell check

[Sam Buchanan]

Keith, that spacer is probably hiding in your 'extra parts' box......  ?

[Booger]

12 hours ago, Dodgeb4ya said:

This is the correct spacer item and what to use to space out the fan and pulley.

I knew it! I have seen this before. Youth is wasted on the young

[Jerry Roberts]

18 hours ago, Dodgeb4ya said:

This is the correct spacer item and what to use to space out the fan and pulley.

That correct spacer will eliminate the problem of having to hold individual washers in place while tightening the bolts . The center holds it . 

[keithb7]

Going thru my spare parts stashes. Not seeing one of those spacers. Even braved the attic stash. Nope. 

 

 

[Bryan]

53 54 55 56 57 58 DODGE CHRYSLER PLYMOUTH MOPAR 5/16 FAN SPACER ADAPTER PILOT | eBay             Washers might be cheaper.

[RobertKB]

10 minutes ago, keithb7 said:

Going thru my spare parts stashes. Not seeing one of those spacers. Even braved the attic stash. Nope. 

 

 

I looked everywhere too without any luck. 

[Dan Hiebert]

You'll find it after you don't need it anymore.  Regardless of the deminimus off set, it would bug me to no end until it was corrected.  But that's just me.