C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Please, Not The OptiSpark...

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Old Aug 12, 2001 | 10:27 PM
  #21  
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Default Re: Please, Not The OptiSpark... (mshipon)

Can a '95 Optispark be used in a '94 without any (or only minor) modifications? If modifications are required, where can I find out about them?
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Old Aug 12, 2001 | 10:52 PM
  #22  
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Default Re: Please, Not The OptiSpark... (mshipon)

Just had my opti, water pump, plug wires and spark plugs replaced. I had the same problem you had. Now the car runs great but it's having a hard time starting. Mechanic found a little leakage out of the weep hole at the bottom of the water pump. Looks like it dripped onto the opti. Why didn't GM recall that system is beyond me!!!!!!!!
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Old Aug 12, 2001 | 10:59 PM
  #23  
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Default Re: Please, Not The OptiSpark... (mshipon)

Check this out. i asked the same question a while back.
http://forums.corvetteforum.com/zerothread?id=98967

You can click on my name and check out the posts I've had about the opti. Look for the topics CREATED by Jimi Lane, then look under the "archived files" instead of "recent". I had a "GREAT" time trying to figure out this opti thing...

jimilane


[Modified by Jimi Lane, 9:04 PM 8/12/2001]


[Modified by Jimi Lane, 9:06 PM 8/12/2001]
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Old Aug 12, 2001 | 11:18 PM
  #24  
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Default Re: Please, Not The OptiSpark... (Jimi Lane)

Thanks Jim,,,,
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Old Aug 13, 2001 | 01:13 AM
  #25  
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Default Re: Please, Not The OptiSpark... (REMMIE)

I just replaced the opti/water pump in my 93. The water pump was leaking, and the car missed very occasionally over 5,000 RPM. No SES lights. Turns out the opti was about gone as well. These things like to hang on forever berfore rolling over dead. :confused:

I had a local shop convert mine to the 95 set up. Like stated in the previous posts he had to drill the cam for the longer pin on the cam, and 95 timing cover, and timing gear if I remember correctly. You have to T into a vacuum line for the new opti. All the parts came out $10 cheaper than just a 93 opti and water pump. Labor was 1.5 more hrs. but I wanted the new opti.
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Old Aug 13, 2001 | 06:28 AM
  #26  
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Default Re: Please, Not The OptiSpark... (93Polo)

What's the name of that local shop and their phone number? Have you used American Corvette in Powder springs for anything? If its doragatory, e-mail me via my profile--don't want you getting kicked off the forum :(
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Old Aug 13, 2001 | 06:31 AM
  #27  
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Default Re: Please, Not The OptiSpark... (REMMIE)

I wonder if anyone has tried to affix a 90 degree fitting to that weep hole to divert the weeping water away from the opti.
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Old Aug 13, 2001 | 11:02 AM
  #28  
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Default Re: Please, Not The OptiSpark... (Andymi)

Andymi, thanks for the offer, but the waterpump is different and I need these parts in a BIG hurry. I ordered them both from Jeff Kopp (along with some other gaskets and seals) and had them shipped 2nd-Day delivery. The parts should be here by Wednesday and in the shop on Thursday.

For anyone who is interested, the parts list for a '94 is as follows:

Opti - P/N 10457702 - $329.00
Water Pump - P/N 12527739 - $145.75
Dist Drive Seal - P/N 10128317 - $2.20
W/P Drive Seals - P/N 10217886 - $4.03 & P/N 12553792 - $0.33
Crank Seal - P/N 10128316 - $6.07

It's been an experience...


[Modified by mshipon, 10:04 AM 8/13/2001]
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Old Aug 13, 2001 | 03:22 PM
  #29  
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Default Re: Please, Not The OptiSpark... (mshipon)

Good luck Martin.

Thanks for the part numbers.
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