My optispark died last summer with no warning and no water leaks. My first thought riding home in the tow truck was dead fuel pump. Nope, fuel pump tested good. Checked spark out of coil, also tested good. Checked for spark at 2 of the 8 cylinders, no spark.
I completed my conversion 10 years ago (1993 Corvette LT1 in a 1977 XJ6) and have never touched the opti.
I wanted to try replacing the optical sensor in the opti.
With some extra time this month I removed the opti. Upon removal and disassembling looks like I will need to change coarse on my planned repair.
The rotor was completely distroyed, there is surface rust on most of the metal pieces inside the cap and the bearing is completely siezed.
I cannot find a replacement bearing, 17mm ID, 35mm OD, 5mm thick. That stops me from rebuilding it.
I believe I am going to go with the Petris replacement optispark. Can’t find any Delphi’s or AC Delco’s. Any body tried one? It comes with a 1 year warranty and the added venting kit improvement. A little pricey at $400.
It looks like my water pump was weeping coolant out the drain hole onto the opti. Ordered a new water pump. I noticed my coolant is very, very rusty! Will do a good flush to try and clear it out.
Is there any kind of additive for the cooling system to help get rid of the rust?