radiator stop leak?? - Diesel Bombers



Ford Powerstroke 99-03 7.3L Discussion of 99-03 7.3 Liter Ford Powerstroke Turbo Diesels

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Old 12-19-2010, 02:22 PM
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Default radiator stop leak??

i noticed i had a leak from my radiator last night, i dont know if its coming from the front or the rear, i was wondering if radiator stop leak is good to run in these trucks, and if so whats the best kind? after sitting for bout 40 min on a slight incline i had a spot bout 4 in long by 2 in wide, and i seen the bottom of radiator was covered, thanks for the help guys

---AutoMerged DoublePost---

okay now im confused, i went and looked and i took the cap off the over flow, and it still had pressure after setting for bout 12 hours? i loosened the cap and it hissed, now if i had a leak it wouldnt hold pressure would it?

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Old 12-19-2010, 03:29 PM
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Check your hoses n clamps
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Old 12-19-2010, 04:17 PM
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imo, that radiator stop leak sh*t is just that, sh*t. if that stuff really stops a leak, think what it could do to the rest your truck's coolant passages it comes in contact with.
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Old 12-19-2010, 04:21 PM
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it will stop small leaks but i never was a fan of it.
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Old 12-19-2010, 04:26 PM
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you sure you're overflow didn't leak?
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Old 12-19-2010, 04:32 PM
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If your radiator cap is bad it may not be holding the pressure right and forcing coolant through the weep hole on the water pump if it's holding to much pressure or out the cap itself if it's not holding enough pressure.
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Old 12-19-2010, 07:27 PM
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so since its still holding pressure after 12 hours, you think its just my cap? its not coming out of water pump, the bottom of radiator on passenger side is wet
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Old 12-19-2010, 07:44 PM
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After 12 hours of sitting you still have pressure. Never heard of such.

If this leak is when your driving and just dripping off while sitting the leak could be coming from anyplace. Them fans blow the smallest drips all over the place.
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Old 12-19-2010, 07:58 PM
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ya i pulled the cap off and it hissed for maybe a second, first time ive ever heard of such a thing, its not a major leak, i filled it bout 3 weeks ago and its dropped bout maybe 4 inches on the overflow
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Old 12-19-2010, 08:14 PM
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If your holdin pressure like that, the only things I can thing of is the cap and or the thermostat. Something is stuck and you don't want to end up blowin a freeze plug.
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