BB belts
Thread Starter
1st Gear
Joined: Feb 2009
Posts: 1
Likes: 0
From: Mountain Top PA
BB belts
Hi Guys.
I know this topic has been addressed before but this may be a slight variation. I have a BB in my 75. I put aluminum pulleys on the crank and water pump along with the idler set-up for the inner belt. The idler hits the pulley with about 2 inches of the adjustment slot left. A 34 5/8 inch belt is too short and a 53 1/8 inch belt is too long because the idler hits. By the way, it is a Merlin block and has P/S and A/C.
Any ideas or a pics of the idler/pulley fit?
THanks
Langg
I know this topic has been addressed before but this may be a slight variation. I have a BB in my 75. I put aluminum pulleys on the crank and water pump along with the idler set-up for the inner belt. The idler hits the pulley with about 2 inches of the adjustment slot left. A 34 5/8 inch belt is too short and a 53 1/8 inch belt is too long because the idler hits. By the way, it is a Merlin block and has P/S and A/C.
Any ideas or a pics of the idler/pulley fit?
THanks
Langg
Burning Brakes
Joined: Dec 2003
Posts: 1,148
Likes: 152
If your problem is just sizing just go to a parts store,have them measure belt and get larger or smaller,then tell them you'll be back and exchange till you get it right,might take a couple times but they were always happy to do it when I first put the bb in mine and the stock belts didn't fit.
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
Here is a 3 belt water pump pulley for BBC that will solve your problem with the idler.
http://cgi.ebay.com/ebaymotors/1971-...2em118Q2el1247
cc
http://cgi.ebay.com/ebaymotors/1971-...2em118Q2el1247
cc
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
Stupid question, does your crank pulley have three grooves? If not it has to be replaced also.
You should have a belt between the crank pulley and the water pump on the innermost grooves, then a belt on the power steering, water pump and crank pulley then a belt on the outermost water pump grrove and A/C pulleys with nothing on the outermost crank pulley groove.
cc
You should have a belt between the crank pulley and the water pump on the innermost grooves, then a belt on the power steering, water pump and crank pulley then a belt on the outermost water pump grrove and A/C pulleys with nothing on the outermost crank pulley groove.
cc
Racer
Joined: Aug 2005
Posts: 456
Likes: 0
From: Forty Fort PA
Crank pulley has only two grooves. The 71 AM shows two groove crank pulley. I have modeled RPO LS5 w/ C60 belt/pulley arrangement shown on page A8 of UPC N40.
I just ordered a 3 groove water pump pulley for $100.00 less from Ecklers. I didn't see the ebay item before I ordered. I hope the Ecklers part is dimensionally the same.
Thanks
Langg
I just ordered a 3 groove water pump pulley for $100.00 less from Ecklers. I didn't see the ebay item before I ordered. I hope the Ecklers part is dimensionally the same.
Thanks
Langg
Last edited by langg; Feb 8, 2009 at 07:11 PM.
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
Crank pulley has only two grooves. The 71 AM shows two groove crank pulley. I have modeled RPO LS5 w/ C60 belt/pulley arrangement shown on page A8 of UPC N40.
I just ordered a 3 groove water pump pulley for $100.00 less from Ecklers. I didn't see the ebay item before I ordered. I hope the Ecklers part is dimensionally the same.
Thanks
Langg
I just ordered a 3 groove water pump pulley for $100.00 less from Ecklers. I didn't see the ebay item before I ordered. I hope the Ecklers part is dimensionally the same.
Thanks
Langg
cc
