duhafnusa4

hi

so first off yes i did search, and none matched my exact issue

today after work I drove home, when I got home, i noticed steam out from under my hood and could hear the coolant boiling over the reservoir, I found this odd as my temp gauge was reading normal, dead in the middle

as I was diagnosing I found that my heater does NOT blow hot, also I found that my thermostat is opening, and yet still it it getting really hot in the radiator


what do you guys think? what should I check next?

thanks!

MDSC

iTrader: (3)

Blown head gasket exhaust gas getting pushed into cooling system slowly causing the overflow to fill. Reason for your heat not working is you now have air pockets in ur system

duhafnusa4

alright, im going to check compression today, we shall see, hope its not...

duhafnusa4

here are my compression numbers

cyl # 1: 220
cyl # 2: 220
cyl 3 3: 210
cyl # 4: 215
cyl # 5: 210
cyl # 6: 209

that looks good to me, what other options for diagnosis are there?

scmaluco

iTrader: (6)

make sure your fan is working??

mak89

iTrader: (6)

Leak down test

scoobySC3

iTrader: (1)

I would also pressure test the radiator cap. If it fails, it cannot create proper pressure in the coolant system, and your fluid is much more likely to boil over, as the pressure increases the boiling point of the fluid.
Also does the car have a turbo? I have seen odd issues with headgaskets that only push fluid under full boost/load. And as mak89 said, a leak down test would be a more thorough way of testing the system. Have you noticed any exhaust/fuel smell in the coolant, or can you see oil droplets floating on top of the coolant?

Thanks,
Rick

duhafnusa4

thanks for all the good ideas folks

my car is turbocharged yes, and I has also converted to an electric fan, which I believe was causing the issue with an intermittent control unit

second issue was no heat inside, found out my vacuum line for the heater control valve had disconnected, so i reconnected it, and there is heat

I replaced the electric fan with the factory clutch fan setup and then took the car for a drive

after a 30 minute drive getting into boost periodically i parked, and examined for boilovers, and found none! (knock on wood)

so as of this moment my diagnosis seems to be an assortment of things

1) electric fan control unit failing

2) disconnected heater control valve leading to faulty diagnosis of heater core



ill be checking daily as to make sure that all is well, but it seems good for now. Funny how a few things wrong can make it look like a much bigger issue

thanks again!