Water Pump/ Fan Pulley Install - 383 HP

[rklewis1005]

Ok, another stupid question. 70 Charger 383 HP Auto. Is there any kind of a spacer under he pulley? I can hear the pulley scraping on the pump bolts. I measured the pump bolt heads and they seem about .020 wider (not thicker) than my OEM bolts. I've cleaned up the OEM ones and just coated them with black oxide, so if there's no spacer, I'll try replacing the bolts tonight after work.

Yes, I know the bolts should be painted with the engine, but I kind of like the contrast of black on orange.

Thanks
Ross

 

[pnora]

No spacer.

 

[493 Mike]

Try button head cap screws-hardware store.
Mike

 

[PurpleBeeper]

No spacer…maybe check for a bent pulley? Does it wobble when running?

 

[MWbirdLOVER70]

Ok, another stupid question. 70 Charger 383 HP Auto. Is there any kind of a spacer under he pulley? I can hear the pulley scraping on the pump bolts. I measured the pump bolt heads and they seem about .020 wider (not thicker) than my OEM bolts. I've cleaned up the OEM ones and just coated them with black oxide, so if there's no spacer, I'll try replacing the bolts tonight after work.

Yes, I know the bolts should be painted with the engine, but I kind of like the contrast of black on orange.

Thanks
Ross

View attachment 1963812

Check pulley for trueness. My 70 no issues

 

[pnora]

Is the water pump new? Compare or find the measurements of the hub surface to the mount surface. I would make sure all the pulley grooves line up. Lots of people end up with a miss match of parts.

 

[ckessel]

Spacer shims can be had if the hub is pressed on too far over the shaft or you've got a "Friday" pulley.
Water Pump Pulley Spacer - New

 

[68 Sport Satellite]

Ok, another stupid question. 70 Charger 383 HP Auto. Is there any kind of a spacer under he pulley? I can hear the pulley scraping on the pump bolts. I measured the pump bolt heads and they seem about .020 wider (not thicker) than my OEM bolts. I've cleaned up the OEM ones and just coated them with black oxide, so if there's no spacer, I'll try replacing the bolts tonight after work.

Yes, I know the bolts should be painted with the engine, but I kind of like the contrast of black on orange.

Thanks
Ross

View attachment 1963812

is this the original pulley or one you acquired for the build? I know that some some used pulleys that I've tried are deeper than others and not intended to fit depth wise. There are no spacers needed. If you get the correct pulley it shouldn't be a problem and you should have clearance.

 

[68 Sport Satellite]

Spacer shims can be had if the hub is pressed on too far over the shaft or you've got a "Friday" pulley.
Water Pump Pulley Spacer - New

I have seen those used on some cars for very precise belt alignment between pulleys if needed, but normally the spacer is not needed only to clear bolts is it? On the other hand, on my car, I did install a shorter head bolt near one of the belts up top for a bit added clearance to prevent belt rub.

 

[rklewis1005]

is this the original pulley or one you acquired for the build? I know that some some used pulleys that I've tried are deeper than others and not intended to fit depth wise. There are no spacers needed. If you get the correct pulley it shouldn't be a problem and you should have clearance.

It's the original pulley. It doesn't seem warped or out of round - it barely rubs but evenly when I spin it around. I'll swap in the original bolts tonight and see if that helps.

 

[Bird 426]

Yes to all of the above. I had to toss hex head bolts on my Hemi.

 

[rklewis1005]

Yes to all of the above. I had to toss hex head bolts on my Hemi.

Adding to the puzzle, I did send the original pump out for rebuild (have to look up where as it was a year ago). Is it possible they pressed the mounting plate on the shaft too deep? I would think there is a ledge or something to shoot it, but I hate to assume. If it's tightened down as it, not only does it rub, the pulleys don't line up the belt grooves.

Am I crazy to think that's my problem? With the pulley in place the stub is approx .30 sticking out. Does someone have a way to check theirs?

Ross

 

[mopar 3 B]

Have you tryed mounting the fan yet?

 

[rklewis1005]

Have you tryed mounting the fan yet?

No - that won't pull it out / make more space right?

 

[rklewis1005]

Is the water pump new? Compare or find the measurements of the hub surface to the mount surface. I would make sure all the pulley grooves line up. Lots of people end up with a miss match of parts.

Water pump was rebuilt by EGGE. Pulley groves don't line up

 

[BSB67]

Adding to the puzzle, I did send the original pump out for rebuild (have to look up where as it was a year ago). Is it possible they pressed the mounting plate on the shaft too deep? I would think there is a ledge or something to shoot it, but I hate to assume. If it's tightened down as it, not only does it rub, the pulleys don't line up the belt grooves.

Am I crazy to think that's my problem? With the pulley in place the stub is approx .30 sticking out. Does someone have a way to check theirs?

Ross

View attachment 1964083

View attachment 1964084

I think you are on to it.

 

[pnora]

Water pump was rebuilt by EGGE. Pulley groves don't line up

Time to get a measurement. Just need a known good pump to get a measurement. Straight edge across the fan hub to the gasket surface.

 

[rklewis1005]

Anyone use shims from Summit? Price is a bit better than 440 Source? I'm thinking about trying them.

https://www.summitracing.com/parts/mrg-6129

Thanks
Ross

 

[67MPRFAN]

Anyone use shims from Summit? Price is a bit better than 440 Source? I'm thinking about trying them.

https://www.summitracing.com/parts/mrg-6129

Thanks
Ross

Yep except mine are from Jegs, I had a issue with pulley not lining up.
If you do use them, the best way to line everything up is, cut the heads off a couple of bolts, screw them in as a guide. I fought trying to line shims pulley and fan up at the same time

 

[Plyrr471]

Couldn’t he just slip a few washers behind the pulley to fix both issues?