to use a radiator sealer or not - Diesel Truck Forum -
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post #1 of 6 (permalink) Old 01-23-2011, 07:10 PM Thread Starter
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Cool to use a radiator sealer or not

looking for opinions or experiences with radiator sealers or stop leak. i have a small leak so i hate to pull the radiator and find a shop to fix it,they aren't always honest,not sure about sealers though,don't want to stop up the radiator or thermostat.experiences or thoughts appreciated let me know what you think guys.
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post #2 of 6 (permalink) Old 01-25-2011, 12:01 PM
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I have used stop leak before , but on selective engines. For instance , my newer trucks , no . Last year we had a 953C leaky radiator, I put the recomended amount which was 2 bottles of stop leak. Took care of the problem and it is still ok. The radiator was getting green or soft , so I figured no harm.

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post #3 of 6 (permalink) Old 01-26-2011, 05:29 AM
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I avoid most additives like the plague HOWEVER, I have successfully used Bars-leak many times and have not once suffered any consequence. Green coloring on a radiator can be removed before it creates deterioration with a spray bottle of (that I cannot remember at the rum soaked moment but it's a bathroom/kitchen sink/tub cleaner) and a soft brush if required. Compressed air, rear to front when its wet will get the between fin debris out. Never bend the fins.

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post #4 of 6 (permalink) Old 01-27-2011, 03:32 AM
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I have had luck on small leaks with both Bars Leak and Alum-Seal. Never had good luck on larger leaks.

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post #5 of 6 (permalink) Old 01-28-2011, 12:52 AM
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Using Bars leak you have to crush all the pellets up, and all that crap just clogs up the heater cores, they are not cheap. Seen many a radiator top covered in rabbit pellets
The Alumiseal is the only one I would ever use, and only until you can get the radiator fixed properly. If it blows when you are on the road you will have a tow bill plus the radiator

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post #6 of 6 (permalink) Old 01-28-2011, 03:36 AM
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If the coolant is hot it/they solidify, never had to crush it up - but I agree: Use anything but get it repaired correctly ASAP, nothing lasts forever.

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