LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Got a new optispark, few questions

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Old Nov 25, 2008 | 04:01 PM
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Default Got a new optispark, few questions

My bad for all the new threads lately, just keep thinking of more questions as winter rolls around and its time to start blowin money again lol... Im about to replace the optispark in my car this winter, and just wondered if theres anything I should be aware of, or if its a simple un bolt - re bolt type of deal... I did the motor swap myself, and when I did I just bolted the opti from my old motor back up 2 the new long block, I've had a bad miss, and my plugs have been rather prone to fouling out, figured not enough spark, plus the opti on the car has 150k miles on it, and has seen tons of water in just the 25k miles I've owned the car since 06.... Another question would be as to the crank hub, I know the harmonic balancer un bolts, if I take it off do I still need to pull the hub off the crank or will it clear the opti? Can't remember exactly, but I think it will clear, which would save me some hastle...

Thanks in advance
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Old Nov 25, 2008 | 08:39 PM
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Originally Posted by Sgt. Spuds
Im about to replace the optispark in my car this winter, and just wondered if theres anything I should be aware of, or if its a simple un bolt - re bolt type of deal...
Remove belt
Remove Radiator fans (unplug wiring harness first)
Remove water pump (unplug water temp sensor first, tie hoses back out the way)
Remove Crank balancer (you can get around the hub).
Remove opti

[Take opti apart, put in hew rotor, bolt on new cap.] <-- if only doing cap/rotor

Install is reverse of removal.

Just did a cap and rotor today
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Old Nov 26, 2008 | 02:26 PM
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Originally Posted by James Montigny
Remove belt
Remove Radiator fans (unplug wiring harness first)
Remove water pump (unplug water temp sensor first, tie hoses back out the way)
Remove Crank balancer (you can get around the hub).
Remove opti

[Take opti apart, put in hew rotor, bolt on new cap.] <-- if only doing cap/rotor

Install is reverse of removal.

Just did a cap and rotor today
It's not too big of a job, but in my opinion, its big enough to warrant not doing just the cap and rotor...replace the whole thing with a new AC Delco or Dephi opti and call it a day.
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Old Nov 26, 2008 | 02:39 PM
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Yea its a whole opti... Is there any way to check and opti when its off the car to see if its good or not?
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Old Nov 26, 2008 | 02:40 PM
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you wont need to take the fans out. i got in there no problem just keeping the radiator vertical by tying it to the front support beam.

i posted 2 videos from youtube that were in spanish of a guy testing an opti cap. maybe you can follow what he does?
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Old Nov 26, 2008 | 03:17 PM
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You can usually open it up and tell if something is wrong. You will need a E4 socket to remove the opti screws on the cap. The most common problems are either one or both of the rotor screws has backed out or one of the plastic rivets holding the metal pointer to the rotor has broken. If you don't see either, open up the base and usually the optical disk or sensor will be corroded/rusted/bent. If you see none of the above, the opti might be ok, but it's not worth the risk to me to put it back in.
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Old Nov 26, 2008 | 06:54 PM
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I just wanna check the old one out, IDK if its my problem or not, really hope it is...
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Old Nov 26, 2008 | 06:57 PM
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screw that opti


msd coil packs F T W



bout the same price too, and they look cool
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Old Nov 26, 2008 | 07:01 PM
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Originally Posted by brynnda
screw that opti


msd coil packs F T W



bout the same price too, and they look cool
A properly installed AC Delco/Delphi opti will last well over 100k miles and handle 99% of people's ignition needs. And for $255+shipping from "thepartsladi" on Ebay, you can't beat it.
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Old Nov 26, 2008 | 10:41 PM
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here's my write-up..

http://www.lt1engine.com/tech/93-97-...emove-replace/
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Old Nov 27, 2008 | 10:12 AM
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I did a MSD Billet Opti about 2 months ago Spuds. Wasn't that hard. Took me about 5 hours taking my time, of course with the support of 2 friends and a case of beer helps. lol. Runs like a champ now! Just make sure to get the dowel pin in the back of the opti and before putting everything back on bump the ignition to make sure you've got everything good.
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Old Nov 27, 2008 | 10:52 AM
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what ever opti you get or cap & rotor....use red lock tite on the 2 screws holding on rotor
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Old Nov 27, 2008 | 11:46 AM
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it wouldnt be bad to start the car with the wp still off right?
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Old Nov 27, 2008 | 01:40 PM
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Originally Posted by Sgt. Spuds
it wouldnt be bad to start the car with the wp still off right?
No. I always test start the car with the water pump and harmonic balancer off. I let it run for a little while, rev it up a bit, once everything checks out, then I shut it off and bolt the rest of the stuff back up.
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