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Old 02-17-2013, 04:55 PM
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leaking coolant

ive been finding a small amount of coolant on the ground in the mornings for a couple weeks. not much just a few drips. couldn't figure where it was coming from. it would only leak over night or when the motor cooled down. so it's been hard to pinpoint it. I just went out now since its been cold all day and sure enough there's a few drops. opened the hood and its leaking out of the cap, down the rad, in the lower rad support and out of the drain hole. the cap seal looks good.

so my question is, why? is it just a bad cap or is it something more serious.
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Old 02-17-2013, 05:08 PM
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What year truck?
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Old 02-17-2013, 05:13 PM
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its a 95 with the rad cap on the rad. not the bottle.
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Old 02-17-2013, 07:54 PM
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Hook a coolant system pressure tester up to the radiator and pressurize it for a while to see if it will start leaking. Repair as needed.
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Old 02-17-2013, 08:00 PM
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I did. no leaks. why would only when it's cold it'll leak. could something be building pressure in the system. or is it just a bad cap.
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Old 02-18-2013, 01:03 AM
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Try the thermostat, my dads 85 Buick runs great but when you cut it off the t stat did something and rushed all the fluid to the overflow, other than that no signs of a problem, try the coolant cap as well, mite be doing something odd when it's not warmed up
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Old 02-18-2013, 02:51 PM
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got a new cap. I'll keep it updated
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Old 02-22-2013, 06:48 AM
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replaced the cap. seems to have fixed it.
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Old 02-22-2013, 07:44 AM
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I had that problem with mine. The tube running from the cap to the overflow was loose and was leaking. A hoseclamp fixed it.
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