FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

2/21/2021 11:12 AM  #1


250 I6 in 66 Mustang - Accessory Belts

The accessory belts were yet another saga.  I found that it would be best to have 2 belts.  A single belt would work but there was only a small amount of wrap around the AC compressor and the alternator, suggesting that these accessories might not work well when they were under load.  So I decided to use 2 belts.
 
 
 
The next step was measuring the belt lengths to take to the local auto parts store.  It turns out I need a 3/8” wide belt for both the AC and the alternator.  The AC belt is a Gates 7470 (47-3/4” long).  The alternator belt is a Gates 7420, 42-5/8 inches long.

 There was a side issue I encountered as well - the water pump pulley I had was a single sheave and I really needed one with 2 sheaves to make the two belts work correctly.  I searched for a pulley but was not successful in finding one. 

On a whim I pulled the water pump pulley from the 351 that was in the car previously (this same pulley was on the 289 that came in the car) and found out that it would work if there was a small spacer between the water pump flange and the inside of the pulley and if I enlarged the center hole in the nose of the V8 pulley. 


I made the spacer out of aluminum stock I had laying around and drilled out the hole using a stepped bit in the drill press.  It bolted up perfectly.


Happily, I have since found the correct pulley for the 250 I-6 and have installed that.

 


Founding Member of the Perpetually Bewildered Society
 

Board footera


REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.