Heat sink compounds
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Update 6/25/2015.
Friends 1994 Corvette.
Replaced the ICM this afternoon. Steps taken....disconnect battery negative cable.
Unplugged weatherpak to ICM.
Removed the bolt on drives side of part holding coil and Ignition Control Module (14mm bolt).
Removed the nut on the stud on right side of part holding coil and ICM.
This released the part that hold coil and ICM. Cleaned off part.
Removed the two small bolts holding the ICM to the heat sink. Heat sink and ICM come off of part. There is old heat sink paste on back of the ICM and the back of the aluminum heat sink where it fastens to the part.
NO heat sink paste on the back of the part which bolts to the head. So thinking that the head does not draw heat away from the coil and ICM.
Cleaned the fins on the aluminum heat sink. Cleaned off old heat sink paste on both sides of the heat sink.
Applied new heat sink paste to new ICM and to the back side of the aluminum heat sink. Tighten screws to ICM and heat sink to the part.
Screwed in stud on left side applying never seize to threads first and tightened.
Removed bolt holding bottom of part in place and inserted 1/4" washer/spacer between part and screwed bolt back in. Applied never seized to threads of bolt first.
Placed part holding ICM and coil onto stud on TOP of the nut portion...so hut is holding it about 1/4" off head. Screwed on nut onto stud.
Placed other 1/4" spacer under part between head and part and bolted in place. Again applied anti-seize to threads first. Tightened all bolts and nuts. Plugged the weatherpak back into the ICM.
So now this is held 1/4" away from the head and should be cooler.
Reconnected neg. battery cable...and car starts. Ran it around the block and so far it is good. Yesterday it died within a block and again about 5 blocks away. Then two more times on a 15 mile trip. Returning it ran fine all the way back.
Friends 1994 Corvette.
Replaced the ICM this afternoon. Steps taken....disconnect battery negative cable.
Unplugged weatherpak to ICM.
Removed the bolt on drives side of part holding coil and Ignition Control Module (14mm bolt).
Removed the nut on the stud on right side of part holding coil and ICM.
This released the part that hold coil and ICM. Cleaned off part.
Removed the two small bolts holding the ICM to the heat sink. Heat sink and ICM come off of part. There is old heat sink paste on back of the ICM and the back of the aluminum heat sink where it fastens to the part.
NO heat sink paste on the back of the part which bolts to the head. So thinking that the head does not draw heat away from the coil and ICM.
Cleaned the fins on the aluminum heat sink. Cleaned off old heat sink paste on both sides of the heat sink.
Applied new heat sink paste to new ICM and to the back side of the aluminum heat sink. Tighten screws to ICM and heat sink to the part.
Screwed in stud on left side applying never seize to threads first and tightened.
Removed bolt holding bottom of part in place and inserted 1/4" washer/spacer between part and screwed bolt back in. Applied never seized to threads of bolt first.
Placed part holding ICM and coil onto stud on TOP of the nut portion...so hut is holding it about 1/4" off head. Screwed on nut onto stud.
Placed other 1/4" spacer under part between head and part and bolted in place. Again applied anti-seize to threads first. Tightened all bolts and nuts. Plugged the weatherpak back into the ICM.
So now this is held 1/4" away from the head and should be cooler.
Reconnected neg. battery cable...and car starts. Ran it around the block and so far it is good. Yesterday it died within a block and again about 5 blocks away. Then two more times on a 15 mile trip. Returning it ran fine all the way back.
