E-Type Heater Motor Replacement

The question of what kind of motor can be used as a replacement for E-Type heaters comes up quite often. Here is one owners solution.
To: xke-lovers@azstarnet.com
Subject: RE: S1 heater motor
From: ffilangeri@juno.com (Frank A Filangeri)
Date: Mon, 17 Mar 1997 20:25:39 EST

Hi Group,

I have finished installing a replacement heater motor in the E with good results. The motor is readily available from Grainger, an industrial supply house located all over the country. The phone number for ordering is 1-800-323-0620.

The motor part number is 2M197 and is 12vdc, [The original part number 2M197 is discontinued, replaced with 3LCH7] permanent magnet (as opposed to field wound as is the original). The shaft size and mounting bolt locations are correct The only modifications required are to re cut the flat on the shaft to a measurement of .200" (cut down .050 deep on the .250 shaft) by .875" long and to poke out the two holes in the heater motor mounting plate to around .160 diameter to clear the larger mounting bolts. Take note of the original motors rotation. The new motor will run in reverse if wired incorrectly. The old motor doesn't care about polarity. My car has been wired for negative ground and when the black wire from the motor is grounded it runs in the correct direction. If you still have a positive ground system, red should go to ground to maintain rotation direction. I also added a short wire with a bullet connector on the end to the ballast resistor and a bullet on to the red motor wire so that this becomes a "snap" connection instead of being soldered on.

This motor seems to blow considerably more air than the original. The defrosters may actually have some small effect now!! The best part is the cost of the motor is only $20.

Frank Filangeri......................................................................."Don't always follow the crowd.
1962 E OTS Flat Floor...........................................................Nobody goes there anymore.
1966 AH 000.........................................................................It's too crowded." Yogi Berra


NOTE: Graingers is a wholesale house and you either need a tax certificate to buy from them or you might try checking with a local motor or air conditioning shop to see if they will order it for you from Grainger. They may mark it up a bit but I doubt if it will cost more than $40. The original Smith's motor was around $200 last time I checked.

The Dayton motor is silver and approximately the same size as the Smith's. You will need to peel the stick on label, shown below off and paint the motor a semi-gloss black. From 4 feet away, I doubt that most concours judges would notice, especially if you glue the Smiths label on it! I put one on my series 2 OTS and can vouch for the increased air output. The same motor will work for the air conditioning fan motor, too.

fan label

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