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  1. #1
    Atomic Punk
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    05.31.14 @ 08:17 PM
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    Default Car Engine Question: Moisture In Distributor.

    Anybody know a trick to keep moisture from getting into the distributor?

    My truck runs fine at idle from a cold star, but wanted to stall out when I accelerate. Once the engine warms up and the moisture evaporates it runs fine. It is a common issue with the Nissan 1993 pickup truck, as far as I've seen on Nissan owner message boards.

    Just wondering. It is storming pretty good outside right now.
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  2. #2
    Atomic Punk chefcraig's Avatar
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    Axx, if you can access the cap without performing major gymnastics, open it up, spray it with WD40, then dry it out completely. You should not need to do this every time you start the vehicle, unless of course the rain is of Biblical proportions. It would be a good idea to keep the can and a clean rag with you in the truck, so you don't get stuck someplace.
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    carpe damn diem billy007's Avatar
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    ...and duct tape - use plenty of duct tape!

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    Is the cap cracked? Can or have you replaced it?

    Could you try using some silicone (sealant) around the base of the cap where it sits on the distributor?
    I swear, it's like I'm playin' cards with my brother's kids or somethin'. You nerve-wrackin' sons-a-bitches.

  5. #5
    Good Enough SLEEPER5150's Avatar
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    12.03.10 @ 03:16 PM
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    Try a little dielectric grease around the rim of the cap. I had an old Chev where this happened to, and it works. The WD-40 is a good idea to get the moisture out to begin with though. Don't use too much grease. You'll know it when there's too much. Just wipe out the excess. also...why you're at it, make sure there's no carbon tracking present on the inside of the cap. It usually happens naturally over time, but when moisture is present, the fine carbon dust tends to bond easier to the internal surfaces which can lead to misfiring. Just wipe any obvious streaks away between the terminals.
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  6. #6
    Baluchitherium
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    04.02.15 @ 07:26 AM
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    Quote Originally Posted by chefcraig View Post
    Axx, if you can access the cap without performing major gymnastics, open it up, spray it with WD40, then dry it out completely. You should not need to do this every time you start the vehicle, unless of course the rain is of Biblical proportions. It would be a good idea to keep the can and a clean rag with you in the truck, so you don't get stuck someplace.
    +1 we do it all the time over here, and it rains A LOT here in England!
    also its worth checking the Dizzy cap for cracks or damage, usually (here at least) theres a rubber seal to stop moisture getting in, which over time can perish, if it has then simply replace it (or buy a new Dizzy cap) if it seems ok then whipe a little oil round the rubber seal.
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  7. #7
    Baluchitherium Ted Van Halen's Avatar
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    12.17.17 @ 06:57 PM
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    WD-40 OR silicone spray inside the cap will displace moisture. The dilectric grease is helpful too around the base of the cap & any grommets where wires come thru to the inside of the cap.

    Could be that the distributor casting is cracked too allowing the moisture in. My sis has on older camry that had that happen. She replaced several caps before a sharp mechanic (our dad) got curious & found it to be the case.
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  8. #8
    Eruption Dimoncutr's Avatar
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    10.06.14 @ 12:51 AM
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    Quote Originally Posted by Yerfdog View Post
    Is the cap cracked? Can or have you replaced it?

    Could you try using some silicone (sealant) around the base of the cap where it sits on the distributor?
    Replace the cap Axe. They're not expensive. Time is money too. You can replace it in your driveway.

  9. #9
    Sinner's Swing!
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    The dilectric grease around all openings does work wonders. Did that on the 77 Dodge I drove while in high school.

 

 

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