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  1. #1

    Smile Coolant Recovery Tank Issue

    Anyone else have this problem, and better yet, how to solve it?

    My current ride is a GMC c3500 crew cab rig, 7.4 liter motor. My issue is the coolant recovery tank -- it seems to be leaking from the top cap area. Coolant seems to be weeping out of the top area with regular driving of the truck. I don't know about the rest of you truckers, but it's becoming a chore to clean the coolant recovery tank & surrounding area every few days.

    Has anyone else experienced this issue, and if so, how to solve it? My option so far is to replace the coolant recover tank completely with a sealed unit from Summit Racing. Does anyone else have a better suggestion?

    Any input is highly appreciated.
    Rex Pascual

  2. #2
    Sr. Mechanic crane3447's Avatar
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    Jan 2008
    Calgary ,Ablerta
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    I've got one of these motors now and have had onother in the past. I always seemed to have a little leakage on the overfill tank with both trucks. But if you are having to clean up a mess that seems a bit much. It may sound like a silly question but your not running to much coolant are you?

    "I'm not mean... your just a sissy"

    '04 silverado 1500 2wd 5.3 (47,000K) - baby
    '97 serria 4x4 2500 454 (121,000K) - beast
    '07 saturn vue V6 (17,000K) - wife's
    '93 ck3500 4x4 6.5 desiel (300+ adding every day)
    - best of all. I don't pay for it!!!

    '04 colarado Z71 3.5 (should have been yellow. complete lemon!)
    '91 serria 2500 2wd 454 (sold at 320,000) - tank

  3. #3

    Default Coolant Recovery Tank Issue

    Good morning,

    Initially it would seem that too much coolant would be the culprit, but I have checked the level in the tank both hot and cold, and it's right on the money. I think the problem occurs on any kind of driving, that the sloshing around of the coolant in the tank somehow manages to direct some flow up to the cap and it seems to seep through. I've had an s-10 in the past, and it's recovery tank seems a bit more tight than my current ride, since it's cap was a screw on plastic (threads both on the cap & the recovery tank neck). I may go this way....swapping out the current tank for an s10 recovery tank, just so the area is clean.

    The other alternative would be to buy a sealed unit from Summit Racing, but I'm not quite sure if that sealed tank would place too much pressure on the cooling system.

    Any thoughts?

  4. #4
    Sr. Mechanic crane3447's Avatar
    Join Date
    Jan 2008
    Calgary ,Ablerta
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    Well if your like me, and by the pic of your truck you are, you like to do what ever you can to keep your ride in tip-top shape. If it bugs you that much, and cost is not an issue, go for it. But I would still ask around at some local dealer/parts/custom shops to see if any has thought of a way to solve the problem. All of those 350's built have the same set up, so sombody must have thought of a solution.

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