silicone paste?

I've been asking local retail outlets about the silicone-zinc di-electric heat sink grease they sell. Apparently there are different formulations. They are not all the same. One computer store guy said the thermal range is up to 77 deg C then the di-electric property breaks down. Another store has something else which is "stable" to 200 deg C and "intermittent" to 300 deg C.

Looking in "Automotive Electronics and Computer Systems" by R N Brady (2001) at the temperature ranges for electronic sensors the typical high temperatures are 125, 150, 175 deg C (the 175 is for the EGR sensor. The enigne coolant max is 130 and the engine oil is 170.) It doesn't give an operating temperature range for the ignition control module but it's probably lower than the 175 deg C for the EGR sensor.

I think you have to be careful about which heat silicone-zinc sink grease to use.

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Do not Spam ME said :if the ICM really had to be insulated from engine heat, it wouldn't be mounted inside anything as hot as a distributor.

here is a hard fact.. Ford got sued and lost millions because they KNEW pla cing the ICM on the distributor would create overheating and failure...engi ne cuts out at normal operating temps cause ICM overheated but would restar t after 20 min and cool down... they figured no one would be able to esily identify it was the ICM in that locattion that caused it so never bothered to fix flaw until 1992 by remote locating ICM away from ditributor to side rail on all FOrd vehicles.

They guessed, and rightly so, anyone experiecing this issue would think of fuel issues, air issues, rad etc etc first since if you tested ICM at garag e...it would be cool and work fine. So why do a recall if no one could iden tify the problem and save themselves money.

So just cause something is placed in a high heat area, dont assume it is me ant to perform there.

Heat transfer grease IS Titanium Oxide Grease, high heat transfer rated @ 2

00c

Dialetic grease cannot transfer at these high heat ranges nessisary, if you use dieletic grease... you'll burn out your new ICM in likely less than a month or so. Look for that engine dying when engine is hot but starts again when cool (providing ICM isnt cooked, then engine will never start again)

but if your ICM is on your distributor like mine was, look up how to make a wire harness for remote location of ICM to side engine or fender wall. There are several helpful how tos outthere and one at ranger station forums , just search remote location to find it.