When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I don't know if it's different but the 72 BB would have 3 belts
One at the rear from the crank to water pump
One from the crank to the water pump to the power steering
one from the power steering up to the alt
there was another groove at the front of the water pump for the AIR pump on the passenger side as well
I don't know if it's different but the 72 BB would have 3 belts
One at the rear from the crank to water pump
One from the crank to the water pump to the power steering
one from the power steering up to the alt
there was another groove at the front of the water pump for the AIR pump on the passenger side as well
M
The set up you're describing is what is mentioned in the AIM.
If you want to go that way, here's the belts I was using in that configuration
Crank WP Belt 15315, 11A0800 Dayco TopCog
P/S Belt 15435, 11A1105 Dayco TopCog
Alt Belt 15320, 11A0815 Dayco TopCog (was using a 15310 but too close to the valve cover)
The crank to water pump belt pretty much requires that you loose off the fan pulley bolts and tilt the pulley to get it on but it's not bad
M
If you want to go that way, here's the belts I was using in that configuration
Crank WP Belt 15315, 11A0800 Dayco TopCog
P/S Belt 15435, 11A1105 Dayco TopCog
Alt Belt 15320, 11A0815 Dayco TopCog (was using a 15310 but too close to the valve cover)
The crank to water pump belt pretty much requires that you loose off the fan pulley bolts and tilt the pulley to get it on but it's not bad
M
Thanks those part numbers make life easier.
Last edited by NJey1985; Jun 25, 2018 at 04:27 PM.
For the other two belts the power steering pulley is adjustable to initally remove the belts and then to adjust the tension afterward with the new belt?
Yes, PS first then the ALT, but there's not a lot of adjustment and the PS pump is a rear treat to loosen off to allow it to pivot.
First thing though is do you have the right pulley on the alternator? The correct one has a large blank spot between the fan part and the groove, like another groove should have been there. If someone changed the alt at some point and used a regular groove pulley then the alignment to the power steering pump will be off. Can't tell from you picture as it's behind the hose
That's a CS144 alt but it's using the stock pulley on the CS fan
M
Last edited by Mooser; Jun 25, 2018 at 11:08 AM.
Reason: added image
Yes, PS first then the ALT, but there's not a lot of adjustment and the PS pump is a rear treat to loosen off to allow it to pivot.
First thing though is do you have the right pulley on the alternator? The correct one has a large blank spot between the fan part and the groove, like another groove should have been there. If someone changed the alt at some point and used a regular groove pulley then the alignment to the power steering pump will be off. Can't tell from you picture as it's behind the hose
That's a CS144 alt but it's using the stock pulley on the CS fan
M
Looks like I have the wrong pulley. Alternator to power steering belt will only line up with the power steering pulley groove that is toward the engine block not the 2nd groove toward the radiator side as per the pictures.
Looks like my current setup is to accomodate the aftermarket alternator with incorrect pulley on it.
Kind of what I thought might have happened.
The correct pulley is available and you might even find one in the used parts section of the forum.
Getting the correct tension on your alt belt is pretty hard with your configuration as the movement is in the wrong direction. Also watch for the fanbelt clearance to your rad hose.
But if it's working, leave it alone until you get that pulley (or just leave it alone)
Adding the crank to water pump belt is still possible though.
M
Kind of what I thought might have happened.
The correct pulley is available and you might even find one in the used parts section of the forum.
Getting the correct tension on your alt belt is pretty hard with your configuration as the movement is in the wrong direction. Also watch for the fanbelt clearance to your rad hose.
But if it's working, leave it alone until you get that pulley (or just leave it alone)
Adding the crank to water pump belt is still possible though.
M
Thanks for the help.
The clearance to the radiator hose is fine, the picture is a bit deceptive.
I am not going to touch it, although I suspect I might need to change the water pump soon so I will have to gather a parts list. Better to have everything and do it at once.
I live Australia and it doesn't appear the pulley is readily available so it will need to be purchased from the US.
You might have to turn it some or cut a bit off the end that goes to the rad to take some of the last bend out but it will work once you get everything in the right place
You might have to turn it some or cut a bit off the end that goes to the rad to take some of the last bend out but it will work once you get everything in the right place
This is correct. That hose is too long, you need to take some of the bend out and it will give you clearance for the alternator pulley... Its still a little tight though.
69 427 Engine Belt layout
