Alternator alighnment issues

[MMorgan62]

Hi folks, I’m having a head scratching moment . I’m hoping someone can slap me out of it! I e owned this 70 Chevelle for a year and have never noticed this issue. I did have the car worked on, they called me and told me my alternator was. Ad and battery was bad so I had them replaced . Anyway my alternator is almost a full pulley out of alighnment. Both water pump and power steering pulleys look fine and line up with crank pulley just fine. With the fixed alternator mount, I can’t shim it out. Im posting pics hoping someone will see the issue thanks! I’m also posting a pic of casting of water pump. It’s the long neck that is proper I believe?

 

[kmakar]

I may be wrong, but but looks like the ear on the top of the alternator is flush with the face and I know I dealt with this before but I could have swore there was another alternator with the ear set back about a 1/2" putting the pulley out a bit more.

This was like 30 years ago though so my memory isn't that good. Putting a dual pulley on it is not the answer though (that's what the supply house was trying to sell me).

 

[MMorgan62]

That was exactly what my parts guy was trying to do. This car is to original to do the double pulley I’m not on board with that . I did have them bring out an alternator for the Chevelle, it was the same .

 

[ZL1Chevelle]

Water pump pulley part number?

 

[ZL1Chevelle]

I just measured a cast iron BB with long water pump pulley: 6 1/4" from face of block to middle of pulley. Measurement taken just to right of bypass hose.

 

[MMorgan62]

6 1/4 here too

 

[ZL1Chevelle]

If I recall correctly, there is supposed to be a spacer/washer behind the alternator fan. I wonder if it's missing? The mounting appears correct to me.

 

[MMorgan62]

Ya, I’m stumped . It has to be with the alternator or the set up of it. Everything else lines up as it should. If I change the water pump pulley it won’t line up with crank.

 

[kmakar]

Maybe put a spacer between the fan and the pulley. The fan should stay closer to the opening so it pushes the air through.

 

[ZL1Chevelle]

Just spit balling here...

 

[kmakar]

Might have to add another spacer but keep the fan where it is, just bump out the pulley.

 

[cheveslakr]

Here's mine, these are deep pulleys however, but oem '69. The bracket is the '69 piece also. Belt is exactly 1 inch CL frontward of the bracket face and lines up perfectly with the WP and crank pulleys. Approx, 6.25 from the block face. No spacer, just alternator, fan and pulley.