88888

So my car has been spitting out coolant after hot runs. I was wondering why it did that and how could I fix it? Its not much coolant but enough to leave about 2ft radius mark on the ground.

4RETECH

iTrader: (86)

Okay, so it's filling up the overflow tanks and coming out?

Or is it coming out somewhere else??

88888

Yes. Overflow tank. But it has been spitting out pretty often and mostly after hot runs. Do I need a new rad cap or something?

barneyb

How much boost are you running?

NousDefions

iTrader: (3)

How much boost? Is your fan running properly? Do you hear it bubble after you shut down after hot runs?

88888

Car boosts at 30psi FP black built motor. I do hear some kind of bubble or liquid moving around after its shut off. Fan should be running properly but I need to confirm on this

5 ltr. beater

sounds like a hg. i have the same problem. made some adjustments to the tune cause it was knocking a little too much and it hasnt pushed coolant since. gonna do a hg soon anyway.

88888

It usually spits out coolant after a hot run immediately after I shut the car off....

BoostControlled

iTrader: (2)

This is commonly a concern for a head gasket issue. What happens on high boost cars with a hot tune is that the cylinder pressures are so high, the gasses push past the head gaskets and into the cooling system, causing overflow and bubbling.

You can try replacing the radiator cap but seeing as it's happening after a "hot" run, it sounds like the cylinder pressures are what's causing the issue. You may want to pull your valve cover and check your head stud torque. Sometimes if the builder didn't torque them properly this can happen.