Lining up pulleys

[Steve D.]

63 327 NOM

The engine is set up as SHP and has an 8" balancer. The AIM shows part # 3770245 (which I have) for the water pump pulley. The crank pulley was originally 3766987, but per Joe L. (from a previous post) it was replaced by 3858533. (My crank pulley is 3744043)I have added a power steering unit, and the pulley on the pump does not align with the crank pulley. So the question is; what combination of pulleys might have the best chance of aligning properly? I realize that there may not have been an OEM configuration of SHP with power steering, and I realize that the idler pulley won't fit in this configuration. But I'm trying to find a practical way of getting things to line up.

Has anyone already been down this road?

Steve

[Joe L.]

Re: Lining up pulleys

Steve----

The 3744043 pulley is a 2 groove pulley. To have one of the grooves of this pulley line up with the power steering pump pulley, you will probably need to use the "drop down", cast iron power steering pump pulley of GM #3834720. This pulley is GM-discontinued, but available in reproduction.

Right now, you probably have a stamped steel power steering pump pulley of GM #3770509. This is the most common pulley. I think that as an alternative to the abvove set-up you can use this pulley if you also use the 1 groove GM #3751232 crankshaft pulley "sandwiched" onto the front of your 3744043 pulley. Many original installations for non-SHP used this configuration. The 3751232 pulley is still available from GM.

[Steve D.]

Re: Lining up pulleys

Joe

The PS pump pulley is 3834720. The photo below shows the misalignment is about one-half of the groove.

Steve

[Chris D.]

Re: Lining up pulleys

Steve,

A couple questions to see where to start.

Which pump pulley is out of line, steering pump or water pump?

Since you said "set up" as SHP and you started with a 3744043 crank pulley, was your engine was originally a 250 or 300 hp mill? The reason I ask is that the location of the hub on the water pump shaft was different between the base and SHP engines. Fix here is to remove pump and press the hub further forward on the shaft.

Other changes will be needed but let's see where you're starting from before we go off on a tangent.

[Joe L.]

Re: Lining up pulleys

Steve-----

Are you sure that the pulley is completely seated on the pump shaft?

There's another possibility, too. Since you are using the SHP balancer, you might have to use the GM #3858533 pulley. I don't think that this will correct the problem, though. However, it's easy to check. Simply place the '533' pulley up against the crank pulley you have installed and see if the groove positions are in the same, relative position. I think they will be;

[Clem Z.]

the best pulley alighment tool

is a 1/4" diameter steel rod 18" long with a 90 degree bend 6 inches from one end. you lay the 90 degree bend into the pulley groove and the straight end of the rod then can be used to see how far off the other pullies are out of line

[Chris D.]

Re: Lining up pulleys

Steve,

I get the picture now. You already have the water pump set and the alternator moved to the rear track. Just swap in the SHP 3858533 deep groove crank pulley Joe recommended and you will be in business.

[Paul Reynolds]

Re: Lining up pulleys

I've been down this road..... And have a collection of pulleys because of it.

You will need to use the 3858533 crank pulley as Joe indicates above. It is a deep groove design that is about 1/2 belt width thicker than the non-SHP lower pulley in your pic. It's the only one that will fit with the deep groove waterpump pulley and the cast iron P/S pulley. It's the stock setup used on the '65 L79 with P/S (non-AC).

[Steve D.]

Thanks everyone. *NM*