I replaced my Opti-Spark and water pump a few months ago with remanufactured units from Napa. I paid around $350 for the Opti parts and was very meticulous while doing the job.
This weekend, I pulled the stuff off again to have a look at it ( due to codes pointing me in that direction ). Sure enough, the Opti was all rusted up inside and the cap portion had some really strange looking corrosion around the contacts. The corrosion isn't like anything I've ever seen, it's really thick, very nasty looking stuff.
Never without a plan, I had a new GM unit on the bench ready to install.
So, for those of you out there doing Opti replacements with After-Market parts, how did you seal the thing up? I used Silicone Gasket Goop to seal the edges between the distributor, the "spacer", and the cap. The vent in the cap was sealed as well.
Is it possible that I sealed moisture inside, causing the rust? Was the Silicone a bad idea?
I suspect the Blue ATV used as a sealant is the cause of the strange corrosion, but the rust is a bit of a mystery.
Thanks,
-Kevin