I have a 2008 ECU that I want to open to see what It has inside ... the first step will be to remove the silicon ... someone knows how this can be done without damaging the electronics?
Thanks in advance.
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Most the ECUs I've run into from Mitsubishi and Denso actually use polyurethane potting. The best solvent I've found for this is MEK (methyl ethyl ketone) which can be found anywhere they sell paint supplies.
(Edit) if it is polyurethane the case will be marked PUR somewhere.
You can soak the ecu in it for days with no damage to the ECU plastics or electronics. Carve off as much of the big chunks of potting as you can with a knife. Then soak it in MEK for a couple hours. Use a small screwdriver or knife to carefully scrape away the dissolved chunks. Repeat. When you get close to the circuit board use an old tooth brush to clean the remaining potting from the circuit board.
It usually takes several days. Soak for a couple hours, work on it for 10 mins, soak for a couple more hours etc. It is not the fastest method but it works well and gives you a very clean board without tearing off any small surface mount parts or damaging cpu pins.
When done wash with a lot of water and blow dry or dry in the sun.
BTW do this outside. The MEK fumes are not only very flammable but very noxious.
-- Edited by RidgeRacer on Wednesday 30th of March 2011 02:24:30 PM
