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

Weird opti problem

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Old Sep 3, 2009 | 12:38 PM
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Default Weird opti problem

On my way to run errands yesterday, the car died on me. Looked under the hood and I had tighened the radiator hose on the pass. side all the way and it was leaking pretty bad.

Here is the weird part, I had put RTV all around the opti when I installed it and from what I could tell, the coolant leaked over the front of the opti and not directly on top and when I 1st pulled over the car would restart and backfire, but after it sat for a few minutes it would not start at all.
Got the car home and tried to start it this morning and no go, I have two questions.

1) Could spray alone get into a supposedly sealed opti and cause this or did fluid get into the connector and create a short between a couple of wires?

2) Should I give it a day and see if it dries out and runs or tear it down( don't want to, just changed wires and WP) and clean it out?

Thanks guys!!
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Old Sep 3, 2009 | 12:55 PM
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If you have a shrink insulation heat gun use it to heat up and dry out the area on, around and in the Opti. Use a hair dryer if you don't have a heat gun. Its worth a try.
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Old Sep 3, 2009 | 12:56 PM
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I'd rent or borrow a code tester and see if the Opti was throwing the code to be the cause. It might dry out, put a drop light down near it to make some heat. Just don't set it on something plastic that it can hurt. There's a lot of difference between 100 degrees with the bulb near things and melting with the shield on something.

Heat gun is a great idea; careful though,they will melt plastic. The wife has not forgiven me for the damage I did defrosting the freezer.....

Good luck but it sounds like you're about to pull an Opti.

Locke

Last edited by Locke; Sep 3, 2009 at 12:58 PM.
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Old Sep 3, 2009 | 01:01 PM
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Yours is a known case of fluid neer the Opti but the last one I looked at that just backfired a few times then refused to start was a case of the 'rotor screws' just backing out.
I've been told that is the common death cause. They need to be pulled apart and the screws epoxied in place or a verry small machine screw and lock nut put in place.
Wish I'd know that before putting my last one in my car!

Locke
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Old Sep 3, 2009 | 01:51 PM
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I thought screws backing out were the 1st gen MSD opti's?

Mine is a Delphi and I will use a hairdrier, thanks for the quick responses!!
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Old Sep 3, 2009 | 02:31 PM
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Thought my leak was caused by a bad hose, well after examining the T housing it wasn't. My housing is pitted and has a lot of build up, especially the underside of the snout, so I would say if you see coolant under your car, it might not be the WP.
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Old Sep 3, 2009 | 03:35 PM
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Originally Posted by Locke
I'd rent or borrow a code tester and see if the Opti was throwing the code to be the cause.
You can bring the codes up on the dash

http://s242.photobucket.com/albums/f...m/ccm%20codes/
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Old Sep 4, 2009 | 10:12 AM
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No codes, but it runs now for about 5 minutes and then just dies.
Could getting the opti wet put a strain on the ICM and caused this?

Cause I have read other peoples threads about this and it always seems to be the ICM.
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Old Sep 4, 2009 | 01:56 PM
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It seems to die when temp gets to 175ish degrees, I would think it would have burned off the coolant at that temp?
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Old Sep 4, 2009 | 02:05 PM
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sounds more like the ICM to me

how old are the wires?
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Old Sep 4, 2009 | 02:22 PM
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I just put them on, that is what started this mess.
I am thinking ICM also, they don't seem to last long, just put this one one about 2-3 yrs ago.
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Old Sep 4, 2009 | 04:35 PM
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One of the things I did when I replaced my ICM and coil (based on a suggestion here) I put several washers between the head and the plate for the ICM/Coil. This seems to have helped the ICM last a little longer.
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