dirtychubbs

alright so the past couple of months or so my car has been randomly overheating. the first time was when i was on my way home from work driving on the freeway around 75mph i look at my gauge and i noticed my temp gauge was climbing. i pulled over, turned it off and waited for it to go back to normal temp. once it did, i drove it home with no problems.
another time was about 2 weeks later when i was at a carls jr. in the drive thru waiting for my food. i looked at my gauges and the temp was climbing fast so i turned it off and once it went back to normal temps i drove home with no problems again.
the car overheated again a couple times on my way home but when ever it overheated it was always a couple weeks apart.
ive been taking it to my mechanic and he says he cant figure out what it is cause when ever i take it to him it runs fine. he has replaced the thermo and checked the water pump. the car shows no sign of blown head gasket (milky oil, white smoke,losing coolant)
recently the car has been overheating quicker once i start to drive it around for about 30min.
my mechanic says that maybe my stock fan isn't strong enough. but i dont think it is because wouldn't it be overheating all the time instead of weeks apart?
today i was driving it for 15min maybe and it started overheating and the top hose was hot and had so much pressure that coolant started leaking from the opening where it connects to the rad.
i took it to my mechanic and he suggested i run without a thermostat for a couple of days to see how it goes.
if i do this will the gauge still be able to tell me if my car overheats?
my dad has been going to this mechanic since his first car and ive been doing the same. this is the first time ive ever taken him a car where he didnt fix the problem the first time. is it possible that hes not bleeding it right?
im convinced that my ex-gf put a curse on my car and makes it overheat once i start to get comfortable and start having fun in it.


im running a mishimoto rad with stock fan on a stock ka24de if that helps.
please leave all possible suggestions that might fix my problem cause im getting really stressed out about this.

zach3904

My first guess would be air in the cooling system. KA's aren't the easiest to all the bubbles out. When was the mishimoto rad put in? By who?

Search for "Lisle 24680" on amazon. First result. Get one of those and it's a piece of cake.

Crazyced

Absolutely love mine.

Nissin19

Must likely your not bleeding it thoroughly. ka's tend to trap a lot of air.

dirtychubbs

mishimoto rad was put in this past december by same mechanic.

edit: https://www.youtube.com/watch?v=sx7GgiafqUk

is this a good way to bleed it? would all the air come out the first time or would i have to repeat this process?

Nissin19

I bled mine while letting the engine get up to temp which will allow the coolant to cycle through the block and allow other bubbles to get to the top. I only loosened the screw 2 or 3 threads. slowly added coolant as needed and squeezing the top hose as needed. Just watch the gauge while doing this so you don't over heat it.

jedi03

Upgrade to electric fan with relay setup..or try new fan clutch

CrimsonRockett

Out of curiosity, are you running the mishimoto rad cap that came with the radiator?

We had the same issue with one years ago. Radiator cap was to blame.

Switch it out if possible.

__________________

-Jspec-
Instagram/CrimsonRockett

dirtychubbs

ya i am using the same mishimoto rad cap. would a rad cap from autozone be fine or does it need to be a specific type of cap?

Ilya

I have the same radiator and the same cap, I took my car out for a good driving today for the first time since replacing the radiator and the clutch fan was on for 75% of the hard drive, but the temps stayed manageable. That has never happened to me with the clutch fan. Must try another radiator cap too.