coolant boil out. Overheat?

[USMCgetsome]

Ok so i have a ka24de in my daily with a koyo aluminum radiator and its been right of the middle of the temp gauge. So i popped the rad cap and saw it was a lil low on coolant. I refilled it and temp still in the middle. I then noticed a hole in my coolant catch resivour. I drove it to the car wash and could smell burning coolant and popped the hood. Saw the coolant boiling in the coolant resivour. Motor cooled down and back to normal. Filled again and watched for oil in coolant or bubbles in coolant. Nada! Any suggestions are welcome. Wtf can i do? btw using 50/50 green coolant mix.

[-RJ-]

blown head? do a compression test

[USMCgetsome]

i thought about that but wouldn't i see air bubbles or oil in the coolant?

[liquid_cool]

have you lookd into your fans?..they might be an issue if your runnin electric...or if your runnin the stock fan set up get a fanclutch eliminator.those are 2 earea's to explore allso....good luck

myspace.com/liquid_cool_ka24de

[-RJ-]

also try replacing your rad cap, that can cause over heating. if that doesnt do it replace your thermostat. how old is your radiator? id also flush it out. all in all id still get a compression test just to make sure.... but thats just me

[USMCgetsome]

found corrosion/pitted aluminum on inside of raditor fill neck. Has a hole. Patched it up with a hard epoxy resin. Got a new cap a few days ago. 13psi. btw this is a koyo 2 core rad. Using stock clutch fan. Also noticed my coolant catch tank has a hole. Very brittle. no Tstat installed.
Modified by KUILLIN_DRIFTER at 1:20 AM 7/17/2008

[-RJ-]

so is your car overheatting? Also you will need to put on a thermostat when the cold season hits, your motor needs that heat

[USMCgetsome]

according to the stock temp gauge. No. But if it boiled out and was still cooking. I assume it would qualify as an overheat.