Radiator stop leak

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by codyb86, Aug 20, 2019.

  1. codyb86

    codyb86 Bobtail Member

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    Blue Devil Radiator stop leak, would you use it or no? And why
     
  2. Goodysnap

    Goodysnap Road Train Member

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    No.......

    Radiator stop leaks gum up normal operating systems and cause way more problems than they are worth. Replace the bad/leaking part and leave the magic fixing potions on the shelf.

    If it does work it is temporary at best.
     
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  3. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    If it’s someone else’s truck and you need to be some place like now, go for it. If it’s yours, get the leak fixed properly.
     
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  4. AModelCat

    AModelCat Road Train Member

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    Mechanic in a bottle. Nope. I wouldn't use it. Good way to clog up heater cores, thermostats and contaminate the cooling system. Just my $0.02.
     
  5. SpeedyGonzalez

    SpeedyGonzalez Light Load Member

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    I've seen leak sealant chew through head gaskets, clog water pumps and cooling channels, if the truck has a coolant filter, well good luck getting any useful flow through that. The worst-case by far was when I worked at a Toyota dealer, sealant did most of the above and caused a flow guide to melt and clog the head on an open deck block, ended up needing a new engine with the amount of coolant that ended up in the oil. There's a reason they have devil in the name, sends an engine straight to hell.
    If the leak is in the fin tubes, clean it up as best you can and smear on some seal all, its a bandaid fix but will get you where you need to be to get it fixed. Tanks are easier, I've been able to patch a quarter-sized rust hole in a tank using some epoxy putty and two-part epoxy, like I said, bandaid fix, got me the 300 miles home where I had a new tank and gasket waiting.
     
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  6. Cattleman84

    Cattleman84 Road Train Member

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    Id crack 3 or 4 raw eggs into the radiator for a quick temporary fix before I used any stop leak product.... Eggs Will seal a small leak, and wash out when you get it repaired... Stop leak will seal leak, but don't wash out, ever.
     
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  7. Boul1234

    Boul1234 Bobtail Member

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    Aug 20, 2019
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    I would have to agree with most comments that it’s a band-aid fix and should definitely only be considered as last resort to get home. But I never recommend it. I’ve seen way too many jammed up cooling system components due to these “magical” sealers that people use instead of getting the proper repairs done. IMO stop leaks of all kind, A/C, coolant, engine, power steering, are just a waste of money and it gives you a false hope that the truck might fix itself.
     
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  8. mhyn

    mhyn Road Train Member

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    except lucas hub oil stop leak.
     
  9. LDLWells

    LDLWells Medium Load Member

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    I've always wondered if they make any bad products
     
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  10. mhyn

    mhyn Road Train Member

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    I don't know any bad product Lucas made..
     
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