Glenno

I'm at the half-way point of changing optispark. I want to change the seals in the timing cover and the gasket to the cover while it's all apart. Is it possible to remove the hub from the end of the crankshaft while the engine is in the car and does it require a puller? If yes. Can the two smaller seals be changed without removing the timing chain cover?

higgyburners

you don't need to remove the cover to change out the water pump drive seal or the Opti seal.

Glenno

How about this part of my question?
Is it possible to remove the hub from the end of the crankshaft while the engine is in the car and does it require a puller?

higgyburners

I never had to remove the hub to do what I needed to do, I just had to remove the Balancer/pulley. I wouldn't mess with the timing cover gasket unless it is leaking or something.

STL94LT1

Yes. It's a little tricky but can be done with a common steering wheel puller.

kimmer

Good question, I know when I did my opti it did not have to come off and there wasn't enough room to get it off.

pianoguy

Here's a vid - you can also make a water pump seal tool out of a Sharpie marker that has been emptied and cut off:

higgyburners

here is how to properly change the seal, yours is older Corvette but its the same install when it comes to the water pump seal.

Glenno

Nice videos! The timing covers look different than mine? Is there a video that shows an actual corvette LT1 timing chain cover removal?