[DeTomaso] coolant Temp senders, engine block

[MikeLDrew at aol.com]

In a message dated 5/18/12 16 12 36, asajay at asajay.com writes:


> 
> Off to the store we go.
> 
> 

Not so fast!   Did you not see my post from the other day?

The OEM Pantera temp senders have their own part numbers which crossed over 
to different part numbers from the ones Bill had come up with.   He had 
just used random Torino etc. senders.

Let me look for that post....

==========

Hi guys,

Last year, we installed a 260-degree Veglia water temp gauge in Lori's '71 
Pantera, which had the stock 230 gauge removed and was fitted with a 
mechanical gauge that, while apparently accurate, was very crude and had no 
illumination.

Seeking Wisdom and Knowledge, I turned to Bill Taylor's article on 
Panteraplace.com to learn about the issue.

http://www.panteraplace.com/page205.htm

Based on that article, I procured a WT324.

What a disaster.

The gauge read WAY too high throughout the range, as verified by a heat gun 
on the radiator.   As the car is a '71 there is no resistor in the wire.   
Rich Boschert set to it, and with the available resistors from Radio Shack, 
eventually got it so that it now reads too low.   I would have liked it if 
we could have gotten closer to the mark, but we eventually gave up for lack 
of time; at least now the gauge moves and indicates *something*.   I would 
like to address it again at some point in the future though.

Wolfgang Geisler in Germany just bought a wonderful red '73 Pantera out of 
Palm Springs, and has had it for a week.   On his car, as soon as you turn 
the key on, the water temp gauge is registering, and it maxxes out at 260+ as 
soon as the car is warmed up, although the car is not nearly that hot.   
Clearly he has some sort of issue, probably with a bad sender.

Rather than shooting in the dark, I decided to help him the old-fashioned 
way--I read the book.   The Ford parts book, specifically.   It lists two 
part numbers for the temp senders.   One for the '71 cars (where it says the 
sender is mounted in the block?) and the other for the '72-'74 cars.

Armed with those numbers I marched down to NAPA auto parts, and they 
crossed them over to the following Echlin/NAPA parts:

'71:   TS7245
'72-'74:   TS6628

And for further reference, the WT324 crosses over to TS6153.

I was able to get tech data for each sender.

TS7245:

100 degrees F, 156 ohms +/- 10%
220 degrees F, 21.4 ohms +/- 5%
250 degrees F, 17.7 ohms

TS6628:

220 degrees F:   22.7-27.5 ohms (that's all they listed)

TS6153 (WT324):   

100 degrees F, 125 ohms +/- 15%
220 degrees, 17.12 ohms +/- 7%

Based solely on the part number recommendation, and without reference to 
Bill's testing, I got Wolfgang the TS6628.   Since it only costs $10, I figure 
we can start off with that and see how it goes, then either trim it with 
additional resistors, or get a different sender if it's still way off.

Just FWIW...

Mike