Re: LT1 issue
 

^^^^^^^^^ There ya go.

Re: LT1 issue
 

As they say in the NFL....After further review"....
The valve train all checked out OK
The motor leaked between 5-7% with one outlier at 9.5% (cold)
There was evidence of moisture in the Optispark connector receptacle.

Tomorrow will replace cap/rotor AND plug the connector hole as suggested.
Thanks for a lot of great help.

John

Re: LT1 issue
 

Looks like the ATI balancer needs to come off to get one of the fasteners to the cap. Am I missing something?

Re: LT1 issue
 

Yes you have to pull the balancer off to get the cap or the whole opti off.

Re: LT1 issue
 

Got it off. What a pain in the *** to change a dist, cap!!!!
I guess the Engineers never considered the service aspect of their design.

Re: LT1 issue
 

IF you think its bad on a race car. You should try it sometime on a street car with all the emmissions and other crap bolted to the front of the engine. Its a real sweatheart of a deal then. LOL.

How did it look was there water in it?

Re: LT1 issue
 

Rob,A minor waterfall came out after the dist cap fasteners were loosened. The area where the rotor and cap appeared OK. The water was behind the white plastic shield. The metal shield was rusty.
Incidentally, The unit still contained the cam timing disc and module. Is this still necessary with the crank trigger or can I take them out?
Also, I could not find a socket to remove the bottom two (recessed) fasteners on the cap.I had to modify a small pair of channel locks to remove them. What size star or metric is that??

Also, filled the Connector receptacle with silicone as discussed earlier.

Thanks,
John

Re: LT1 issue
 

OK....The Optispark cap bolts are E4 Torx. Not a socket found in regular tool or auto parts stores. Apparently Snap On and Matco carry them.
However, on another forum A guy posted that the throttle body cover screws are the correct size torx. As I had a spare throttle body, I removed one of the screws, chucked it up in a vice grips and got a tool (however crude) that works.

Re: LT1 issue
 

That is basically what MSD sends you with a new cap and rotor or complete Optispark. Its just a screw with a thick nut on it. As far as taking the stuff out of the inside (wheel and sensor). I have always left mine in with no problems. Glad you found the problem and are back on track.

Re: LT1 issue
 

Thanks Rob.