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I just finished an Optispark replacement and a complete rebuild of ther cooling system, new radiator, heater core, WP, and hoses on my 1995 LT-1. Started it up no water leaks. At temp I had an oil leak. It materialized on the lowest point of the forward cross member, vehicle on jack stands. I surmised it was the Optispark Distributor seal.
Installed new seal after tearing down the front of the engine again (round trip 6 hours).
Important data for others replacing Optispark. FelPro Timing Cover Gasket Kit, FelPro # TCS 45956 contains 2 WP to block seals, 1 timing cover gasket 2 WP O-rings, 1 WP Seal, And 1-95644 Distributor Drive Shaft Seal. All this for $10 at O'Reilley's.
The seal can be replaced easily from the front of the cover without temoving the cover. For $10 anyone replacing the Optispark might want to change this seal. The new seal was considerably tighter than the old one!
I have a seal leking either behind one of the 3 seals or the timing chain cover.I hope its the wp or opti seal, the other 2 would be a pain in the but.
I'm seeing the same leak on my car as described, and the water pump but not opti was replaced (previous owner).
I'm thinking if I have to yank water pump, opti, crank pulley, then wouldn't it be wise to replace timing chain and timing gears as well?
My first lt1 corvette lunched a set of timing gears, chain, and bent a few valves at 40k miles. Thank God GM covered that little mess under warranty (this was 1996).
I just finished an Optispark replacement and a complete rebuild of ther cooling system, new radiator, heater core, WP, and hoses on my 1995 LT-1. Started it up no water leaks. At temp I had an oil leak. It materialized on the lowest point of the forward cross member, vehicle on jack stands. I surmised it was the Optispark Distributor seal.
Installed new seal after tearing down the front of the engine again (round trip 6 hours).
Important data for others replacing Optispark. FelPro Timing Cover Gasket Kit, FelPro # TCS 45956 contains 2 WP to block seals, 1 timing cover gasket 2 WP O-rings, 1 WP Seal, And 1-95644 Distributor Drive Shaft Seal. All this for $10 at O'Reilley's.
The seal can be replaced easily from the front of the cover without temoving the cover. For $10 anyone replacing the Optispark might want to change this seal. The new seal was considerably tighter than the old one!
Will i have to time the engine. It's a brand new lt1 crate motor. Any other tips or suggestions
Here's the difference between old and new opti seals. The old one let quite a bit of oil escape and get blown around the engine bay. Cheap and easy to do, once you get to it.
07-07-2010, 10:58 AM
Optispark Replacement Seal
cant wait to get my car running right
