Mounting Location

Here's Where We Believe Ford Intended

the Oil Cooler to Mount

The photos above show the oil cooler installed on a '71 Mustang in what we believe is the location Ford had intended. The installation was done using the correct*  upper and lower brackets for the '71 Mustang and located the only way they will fit correctly without cutting and/or hammering (which weren't the intended procedures on the assembly line).

People who try to install a cooler on a 71 Mustang often do not know where to put it or what brackets and hoses to use, so they try to copy the 69-70 Mustang installation, which isn't correct for a 71 Mustang. The never-produced 71 Boss 302 Mustang's cooler was intended to be installed the same way as it was on a `70 Torino, which shares the same radiator support as the 71 Mustang. The 71 Mustang intended to use the Torino's lower rear facing D0OE-B bracket, and a modified top bracket, but due to a difference in the width of the Torino and Mustang hood latch bracket. (The top Torino D0OE-B rear facing cooler bracket didn't work on the 71 Mustang) Ford had to come up with a new D1ZE `71 Mustang rear facing top bracket to make it all work on the 71 Mustang. The new 71 Mustang only D1ZE cooler hoses were also necessary. The correct cooler part numbers for the 71 Mustang installation are all listed in the 72 Ford O.H.O Muscle Parts book shown at the bottom of this page.

* We say correct  based on Ford's 71-72 O.H.O (Muscle Parts) parts book which lists the Ford part numbers for the upper and lower brackets needed for the oil cooler kit installation on the '71 429 SCJ Mustang.

Cooler Brackets

Upper Bracket

These pictures shows the D1ZZ upper oil cooler bracket (from just about every angle imaginable!). The upper bracket part# is D1ZZ-6B633-A and the number stamped on it is D1ZE-6B633-AA.

A Theory About the Notch on the side of the bracket...

See the cut away "notched" area by the bolt hole?

We see no reason for this notch on a '71 Mustang application. However, we believe it might have been required to clear the grill support on the never produced '71 Cougar Eliminator with a Boss 302 engine. To support this theory, the photo below shows the '71 Cougar Radiator support (common part with '71 Mustang) with a red overlay of the top oil cooler bracket's presumed design intent location. Note how the notch fits almost perfectly to clear the grill support bracket on the '71 Cougar!

Lower Bracket

The lower oil cooler bracket part number is D0OZ-6B634-B and the number stamped on it is D0OE-6B634-B.

Below is the D0OE-6B634-A lower oil cooler bracket. Although similar in appearance to D0OE-B, the fore/aft location of the two "U" shaped supports is different.

Various Owner-installed oil coolers on '71 Mustangs

The three oil cooler installation photos in this row are of owner installed coolers. We have yet to find one that was a factory installation.

This picture shows an installed view of the oil filter adaptor and cooler lines.

The oil cooler lines are visible in the lower portion of the above photo.

This picture shows an NOS D1ZZ-6A715-A oil cooler line, an NOS D1ZZ-6A715-B oil cooler line, an NOS D1ZZ-6881-A block adaptor and a D1ZZ-6A636-A gasket.

Heat Exchanger

This is a close up shot of the oil cooler heat exchanger assembly.

Oil Filter Adaptor

These are close ups of the D1ZE-6881-AA  oil filter adaptor (note the D1ZZ version is the service replacement). Note that we believe the D1ZE Mustang hose ends were straight (note that some examples shown here have the Torino style 45 and 90 degree ends).

Oil Filter Adaptor to Block gasket

This complete oil cooler kit was recently sold on Ebay. 

The top D1ZZ hose was 39" long and the lower  hose was 32". Both hoses used the straight steel Aeroquip hose ends(size 10) as shown in the diagram above left.