leaking coolant

[tony0713]

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.

[madpogue]

What year truck?

[tony0713]

its a 95 with the rad cap on the rad. not the bottle.

[dazed01]

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.

[tony0713]

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.

[351fifty]

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

[tony0713]

got a new cap. I'll keep it updated

[tony0713]

replaced the cap. seems to have fixed it.

[sgg93]

I had that problem with mine. The tube running from the cap to the overflow was loose and was leaking. A hoseclamp fixed it.