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This page explains which engine pulleys were used as well
as the belt routing for the 71 429
Mustang and Cougar.
(Note: Click thumbnails to enlarge pictures.)
429 CJ/SCJ Belt
Routing Diagrams |
429 CJ with A/C |
429 CJ without A/C |
429 SCJ
(note: P/S or idler not present in this photo) |
A/C Idler
Two A/C Idlers were used together on the 429 CJ with
Air Conditioning. An Adjustable Idler up next to the A/C compressor and a
Fixed Idler that bolted to the P/S Bracket and Water Pump.
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A/C Idler - Adjustable |
This is the Adjustable A/C
Idler. It was used to adjust belt tension on the A/C compressor. A square slot
was placed in the bracket to allow a breaker bar to be inserted and
levered by the mechanic to set belt tension. The factory part
number from the MPC for this part is D0AZ-8678-C, however no
stamped part number is visible on parts we have examined. Installed views
of the Adjustable A/C Idler are shown below.
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A/C Idler - Fixed |
This is the Fixed A/C Idler that bolted to the Water
pump and P/S bracket. We suspect this fixed idler was used to keep the
belt from vibrating on the long span from the A/C Compressor to the Crank
Pulley. The factory part number for this part is D0AZ- 8678-B, however,
the service part seems to be far more common at swap meets. It has part
number D3AH-8A617-AA as shown below left. An installed view of the Fixed
Idler is shown below right.
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Powersteering Pulley |
This is the P/S Pulley (Part #D0AR-3D673-A) used on the 429
CJ/SCJ. It had a diameter of 5 5/8".
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Note To Our 429 CJ/SCJ Torino/Cyclone/Ranchero Friends:
During the research for this page, it was noted that several of the pulley's
listed above for the 71 429 CJ/SCJ Mustang and Cougar had different part
numbers/diameters than those listed for your 429 CJ/SCJ Torino/Cyclone/Ranchero
applications. Please be aware of this when using this site and we recommend that
you reference the MPC for the correct part numbers for your vehicles.
429 Group Member Cars at the Mustang 40th
Anniversary
Jim Ginger's 429 CJ Mach 1
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