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

Doing My Optispark Today Any Tips

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Old Aug 17, 2010 | 03:59 PM
  #1  
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Default Doing My Optispark Today Any Tips

Im ready to install my new Opti. Seems like a nice one black cap with brass termimals supposed to be a performance one. I got it off ebay for a nice price. I ran a bead of black RTV around the cap to help prevent moisture getting in. I was wondering if I should plug the vent holes on the bottom perhaps that is where moisture gets in. Has anyone done this. I have a non vented 1993 with the three holes on the bottom
Also what sealer should I use for the watre pump bolts I have the permatex 2 thread sealer and a tip I read on here Im gonna apply some anti sieze to the hub for the crank to prevent it from seizing on there if I ever have to go back in here again. All suggestions are greatly appreciated

Last I hope I get to hear it run today

Mike
Long Island
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Old Aug 17, 2010 | 05:22 PM
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Have you got that sorry pulley off yet???? If not good luck with that.
The short drivers side water pump bolt is tough to get to also.
I saw in on thread to use joint compound on the w/p bolts,that looks like what GM used.
I am still trying to get the crankshaft pulley off mine day 3 or 4.soaked it with PB blaster nothing,so I got a puller today and will modify it to fit.It's raining now or I would be out working on it.I still need to find a fitting to install a drain on the w/p also.The local auto parts didn't have anything that looked good to use.
While your there replace the timing cover seals for the w/p and opti.
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Old Aug 17, 2010 | 05:45 PM
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Default Hear ya

Originally Posted by tblt44
Have you got that sorry pulley off yet???? If not good luck with that.
The short drivers side water pump bolt is tough to get to also.
I saw in on thread to use joint compound on the w/p bolts,that looks like what GM used.
I am still trying to get the crankshaft pulley off mine day 3 or 4.soaked it with PB blaster nothing,so I got a puller today and will modify it to fit.It's raining now or I would be out working on it.I still need to find a fitting to install a drain on the w/p also.The local auto parts didn't have anything that looked good to use.
While your there replace the timing cover seals for the w/p and opti.
Hi No lie
My hub just literally fell off. Someone was in there once before and had the presence of mind to put anti seize around the hub surface where is sticks to the crank and the crack itself. What a great idea and GM should have done this from the get go. Opti is in, hub is on water pump next. I should have this done in an hour or two at most. Advice is to put anti seize on the hub so that if your ever back in there it will actually slide off. Mine was a total joy. Hope you get yours off I know the problem well
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Old Aug 17, 2010 | 05:54 PM
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Did you get WP gaskets?

Get 1/4" vacuum hose and seal it to the WP weep hole and run it past the opti, this will prevent coolant dripping on the opti.
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Old Aug 17, 2010 | 06:46 PM
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Originally Posted by Mikes1991
Hi No lie
My hub just literally fell off.
Let's hope not.

Jake
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Old Aug 17, 2010 | 11:43 PM
  #6  
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Originally Posted by Mikes1991
Im ready to install my new Opti. Seems like a nice one black cap with brass termimals supposed to be a performance one. I got it off ebay for a nice price. I ran a bead of black RTV around the cap to help prevent moisture getting in. I was wondering if I should plug the vent holes on the bottom perhaps that is where moisture gets in. Has anyone done this. I have a non vented 1993 with the three holes on the bottom
Also what sealer should I use for the watre pump bolts I have the permatex 2 thread sealer and a tip I read on here Im gonna apply some anti sieze to the hub for the crank to prevent it from seizing on there if I ever have to go back in here again. All suggestions are greatly appreciated

Last I hope I get to hear it run today

Mike
Long Island
Hi,
Don't plug up the drain holes on your new Opti. Water/condensation will find its way into your distributor but will have no way to get out.
Better idea is to upgrade your distributor with a vacuum line kit available at GM dealers. Maybe someone will chirp in with a P/N.
The factory added the vacuum harness from 94/95 on to address moisture/anti-freeze related failures.
I am replacing my WP and removed/inspected my Opti.
I found no water/antifreeze damage with 75k miles!
Sealed it up with RTV, cleaned the rotor/cap contacts and installed new wires.
I should be good to go for another 75k+ miles.
Also change your plugs every 30-40k miles or when engine exhibits rough running.
My first Opti died due to worn out plugs resulting in a badly carbon-tracked cap.
"SPARK PLUGS DO NOT LAST 100K MILES/FOREVER"
Best of Luck,

92WhitevetteGuy
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Old Aug 18, 2010 | 02:07 AM
  #7  
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Originally Posted by JAKE
Let's hope not.

Jake
Maybe the damper came off easily, but not the hub.

No reason to remove the hub for an opti change and it's definitely not something you want to just fall off.
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Old Aug 18, 2010 | 07:03 AM
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Yeah replace the seals if they are old or you don't know.
A leak is a mess and more work.

http://www.impalasuperstore.com/nais...lace,with,pics
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Old Aug 18, 2010 | 08:42 AM
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the holes in your opti are to vent the ozone that is created by the activity inside the opti.ozone will destroy an opti.and on another note im pretty sure that the hub needs to come off when removing a stock opti,however the msd unit does not require this.on the driver side w/p bolt that is partially hidden behind the power steering pulley,be careful not bend the pulley with the socket while your removing the bolt.other than that its a pretty easy job.oh yeah,dont forget to number the wires its easy to get them mixed up.
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Old Aug 18, 2010 | 09:15 AM
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Originally Posted by c-4 lhozwalte
the holes in your opti are to vent the ozone that is created by the activity inside the opti.ozone will destroy an opti.and on another note im pretty sure that the hub needs to come off when removing a stock opti,however the msd unit does not require this.on the driver side w/p bolt that is partially hidden behind the power steering pulley,be careful not bend the pulley with the socket while your removing the bolt.other than that its a pretty easy job.oh yeah,dont forget to number the wires its easy to get them mixed up.
Nope.
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Old Aug 20, 2010 | 02:19 PM
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I am so glad I read your post. I'm getting everything together to do the opti on my '93 coupe. This will be a 3rd opti. Sure enough, my o-rings are absent. Where can I get these? Do you have a part number?
Also, the MSD cap and rotor gives you the ability to add a vaccume and fresh air line to your first generation opti. That's what I plan to do.
Thanks;
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Old Aug 20, 2010 | 08:52 PM
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Originally Posted by choopes
I am so glad I read your post. I'm getting everything together to do the opti on my '93 coupe. This will be a 3rd opti. Sure enough, my o-rings are absent. Where can I get these? Do you have a part number?
Also, the MSD cap and rotor gives you the ability to add a vaccume and fresh air line to your first generation opti. That's what I plan to do.
Thanks;
I think the 2 small o rings at the bottom of this pic is what your looking for.
http://shop.advanceautoparts.com/web...0_842119052___
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Old Aug 20, 2010 | 10:58 PM
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Originally Posted by choopes
I am so glad I read your post. I'm getting everything together to do the opti on my '93 coupe. This will be a 3rd opti. Sure enough, my o-rings are absent. Where can I get these? Do you have a part number?
Also, the MSD cap and rotor gives you the ability to add a vaccume and fresh air line to your first generation opti. That's what I plan to do.
Thanks;
Here's the upgrade I did on my 93 Opti

http://www.corvettefever.com/howto/16758/index.html

The vent hose kit # is GM PART # 12555323 48.00 from gmparts direct
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