my first time use mls on 400 with steamholes was told to put copper silicone around water ports and let dry 15 min and then spray with copper sray let sit 5 min till taky and install.torque, loosen and re torque 3 times does this sound right ?? thanx
This motor is my 1st Cometics also, and they went on dry & no re-torque.
My builder did say some reuse, re-torque them, but he does not reuse or re-torque them.
Spraying 300 HP, and have 10-12 pass's so far.
My results may not be typical........but...........the Cometics on Henderson's 632, have about 250 runs on them, most with 3 kits. OK, 250 runs is NOT that many, until you factor in that this motor gets rings about every 40 passes and rods every 75-80. Meaning the headgaskets have been reused many times, not to mention, the engine gets the shit sprayed out of it. I do NOTHING, when I reuse them and I mean nothing. No cleaner, no copper coat, so silicone. I just wipe them off with a rag and put them back on.
Martin are you sure the leak isnt coming thru the stud threads ? if thats the case then it has nothing to do with the gasket. BTW the process you first posted sounded like it was for copper gaskets ,not sure who told you that. I have reused MLS many times.
You do have MLS and not copper gaskets correct ?