Topic: C6DZ Temp Sender Differences

[s2ms]

Trying to find info on the differences between the C6DZ-10884-A and C6DZ-10884-B water temperature sending units. Both senders are the same size the physical differences being the 'A' has a white insulator and is stamped '250' while the 'B' has a red insulator and stamped '260'. MPC transition date listed for both is 9/1/65. There's lots of info on the 'B' unit but I couldn't find much on the 'A' except in the 60-68 MPC.

From the 60-68 MPC:
C6DZ-10884-A:
 66 - Ford, Mustang, Falcon - 6 cylinder
 66 - Bronco
 67-68 - Mustang (except 428CJ)

C6DZ-10884-B:
 66 - Ford, Fairlane, Mustang, T-Bird, Bronco, Falcon - V8
 68 - T-Bird
 68 - Mustang (428CJ)

The 65-72 MPC does not list the 'A' unit at all, instead lists most of those with 'A' in the 60-68 MPC as having the 'B'. I assume this means they are interchangeable.

Anyone know what the functional difference between these units is?

Does the 67-68 Mustangs listed as having the 'A' in the 60-68 MPC include Shelbys?

Thanks,
Dave

[Brian Conway]

I run the ' B ' in my 69 w/gauges.  I suspect the ' A ' is for warning lights ?  Brian

[67gta289]

The way I read this is as shown in the attached file.  I see potential confusion for 1967 and later 6 cylinder applications, but the V8 applications look pretty clear to me.  That doesn't answer the question as to what is different.

[67gta289]

The 1967 MPC is pretty clear for applications

[67gta289]

I run the ' B ' in my 69 w/gauges.  I suspect the ' A ' is for warning lights ?  Brian

All models through 68 had temp gauges, even with the tach option.

[196667Bob]

Trying to find info on the differences between the C6DZ-10884-A and C6DZ-10884-B water temperature sending units. Both senders are the same size the physical differences being the 'A' has a white insulator and is stamped '250' while the 'B' has a red insulator and stamped '260'. MPC transition date listed for both is 9/1/65. There's lots of info on the 'B' unit but I couldn't find much on the 'A' except in the 60-68 MPC.

From the 60-68 MPC:
C6DZ-10884-A:
 66 - Ford, Mustang, Falcon - 6 cylinder
 66 - Bronco
 67-68 - Mustang (except 428CJ)

C6DZ-10884-B:
 66 - Ford, Fairlane, Mustang, T-Bird, Bronco, Falcon - V8
 68 - T-Bird
 68 - Mustang (428CJ)

The 65-72 MPC does not list the 'A' unit at all, instead lists most of those with 'A' in the 60-68 MPC as having the 'B'. I assume this means they are interchangeable.

Anyone know what the functional difference between these units is?

Does the 67-68 Mustangs listed as having the 'A' in the 60-68 MPC include Shelbys?

Thanks,
Dave

What you have just described shows the "dangers" in using an MPC that is years removed from the specific year that one is trying to "explore".

Both the "1966 Only" and the "1967 Only" MPC's clearly show that the C6DZ-10884-A sending unit is for 6 cylinder cars, and the C6DZ-10884-B sending unit is for V8's.  As John noted, while the 1960-68 MPC (pages printed in 1967 and 1968) is a little confusing (remember, this MPC covers 9 years of temperature sending units), it does still note that the  "-A" is for 6 cylinders and the "-B" is for V8's (appropriate portion attached).

The 1965-72 MPC was printed in May of 1975. By then, many of the original Service Parts had either been replaced by a newer part, or was interchanged with a different part. In the case of the Temperature Sending Unit, by July of 1974 (or sooner), the C6DZ-10884-A was replaced by C6DZ-10884-B (July 1974 Ford OSI Catalog). This follows what was done some years earlier with the 1965 sending units (the 1/8" NPT ones) when the C5AZ-10884-A was replaced by C5AZ-10884-B.

Hope this will help explain your questions, as well a make you and others about cautions to be taken when looking at an MPC somewhat "removed" from the year being investigated.

Bob

[s2ms]

Thanks for the replies. I don't have copies of the 66 or 67 "only" MPC's, that pretty much clears it up!

Dave

[jwc66k]

Trying to find info on the differences between the C6DZ-10884-A and C6DZ-10884-B water temperature sending units. Both senders are the same size the physical differences being the 'A' has a white insulator and is stamped '250' while the 'B' has a red insulator and stamped '260'. MPC transition date listed for both is 9/1/65. There's lots of info on the 'B' unit but I couldn't find much on the 'A' except in the 60-68 MPC.
Anyone know what the functional difference between these units is?

Both the "1966 Only" and the "1967 Only" MPC's clearly show that the C6DZ-10884-A sending unit is for 6 cylinder cars, and the C6DZ-10884-B sending unit is for V8's.  As John noted, while the 1960-68 MPC (pages printed in 1967 and 1968) is a little confusing (remember, this MPC covers 9 years of temperature sending units), it does still note that the  "-A" is for 6 cylinders and the "-B" is for V8's (appropriate portion attached).
The 1965-72 MPC was printed in May of 1975. By then, many of the original Service Parts had either been replaced by a newer part, or was interchanged with a different part. In the case of the Temperature Sending Unit, by July of 1974 (or sooner), the C6DZ-10884-A was replaced by C6DZ-10884-B (July 1974 Ford OSI Catalog). This follows what was done some years earlier with the 1965 sending units (the 1/8" NPT ones) when the C5AZ-10884-A was replaced by C5AZ-10884-B.
Hope this will help explain your questions, as well a make you and others about cautions to be taken when looking at an MPC somewhat "removed" from the year being investigated.

The -B ultimately replaced the -A, but the original question -
Anyone know what the functional difference between these units is?
- has not been answered.
Jim

[s2ms]

The -B ultimately replaced the -A, but the original question -
Anyone know what the functional difference between these units is?
- has not been answered.
Jim

Thanks Jim. The "only" MPC's more clearly identify the proper applications but why, for example, did 66 Mustang 6 cyl and V8 use different senders when they both shared the same temp gauge?

Also, Bob Mannel's SBF book shows pics of the C6DZ sender in the 65 and 66 chapters with white insulators which suggests the -A sender.

Dave

[196667Bob]

Jim : I assume that you are referencing differences other than the "6 Cylinder" versus "8 Cylinder" applications previously noted ? In particular I believe you are looking for "electro-mechanical" differences. Before addressing this, I need to clarify my semantics. While such words as "electro-mechanical" can sometimes be associated with one of our "long time" Engineering sayings "If you cannot baffle them with brilliance, befuddle them with BS", that is not the case here.

For several years prior to 1965, temperature sending units were stamped "250". This referred to the upper temperature of the unit ; 250° F. In 1965, Ford apparently felt that V8's ran hotter than 6 Cylinder engines, and thus stamped the senders for V8's "260", as well as having a red insert versus a white insert on top around the threaded post. This difference continued in 1966 and 1967.
This also explains why Ford took the conservative approach in replacing the "-A" (250°) sender with the "-B" (260°) sender, and thus not be forced to carry two different Service Parts.

Hopefully, this will clear things up.

Bob

[jwc66k]

Jim : I assume that you are referencing differences other than the "6 Cylinder" versus "8 Cylinder" applications previously noted ? In particular I believe you are looking for "electro-mechanical" differences. Before addressing this, I need to clarify my semantics. While such words as "electro-mechanical" can sometimes be associated with one of our "long time" Engineering sayings "If you cannot baffle them with brilliance, befuddle them with BS", that is not the case here.

For several years prior to 1965, temperature sending units were stamped "250". This referred to the upper temperature of the unit ; 250° F. In 1965, Ford apparently felt that V8's ran hotter than 6 Cylinder engines, and thus stamped the senders for V8's "260", as well as having a red insert versus a white insert on top around the threaded post. This difference continued in 1966 and 1967.
This also explains why Ford took the conservative approach in replacing the "-A" (250°) sender with the "-B" (260°) sender, and thus not be forced to carry two different Service Parts.


Hopefully, this will clear things up.

Bob

I made the assumption that the differences were temperature related just due to the use of the two numbers "250" and "260", they appeared to be temperatures. With the multitude of different markings and different formats used by many Ford parts suppliers on Ford used parts, it can be confusing. You used a lot of words to differentiate application but neglected to address the original question -  Anyone know what the functional difference between these units is?
It's finally answered.
Jim

[s2ms]

Geez, if I had only looked a little more in my own stuff I could have answered at least part of my question. Totally forgot I had a 1968 Autolite Switches guide which clearly shows the applications, screenshot below. It still doesn't answer anything about functional difference.

Still wonder why Bob Mannel's SBF book shows the white insulator sender.

Dave

[jwc66k]

Still wonder why Bob Mannel's SBF book shows the white insulator sender.

Good question. Got a page number? It may have been corrected in his List of Changes.
Jim

[s2ms]

Pages 5-37 and 6-29 in both the printed version and latest digital version.

[jwc66k]

Pages 5-37 and 6-29 in both the printed version and latest digital version.

Thanks. Found them. No changes. The insulators are definitely white in all the pictures indicating a 6 cylinder application, however, on page 6-29 (pic 6G4) I see a "6" as in "260" stamped on a hex surface (with AUTOLITE above). All this does is add confusion.
Jim