Here is my setup and situation.
My motor is semi-built... pistons and rods. Ported and polished head with springs, retainers, and head studs. It's turboed and tuned. (Nothing out of the ordinary)

the car runs excellent and i just did a leak down test and had virtually perfect numbers. I didn't belive this so i had a local tuner do the leak down test and he had identical numbers.

My problem:
On low boost the problem is not as bad. When i drive the car on high boost my overflow tank ends up full of coolant and my temp strats to go up due to low coolant. So every time i go anywhere with the car i have to add coolant/water. I am not running a thermostat on the car (it's gutted). I don't think that this is the issue, because I've ran the car without it for 2 years and haven't had any problems.

Could this be a head gasket? I just replaced my radiator to a thicker one because i thought that my old one was the problem but the same thing is happening. My fan works on a switch so it runs constantly.

When I start the car and take the radiator cap off i can see the coolant moving and when i give it gas the i it spits up a little out of the radiator. I am not sure if it can be anything but the head gasket? But I am very confused because the leakdown test showed the engine to be healty.

Any help is appriciated, sorry for the long write up, I'm just trying to include everything and as detailed as possible.

 

Can anyone help me with this?

 

b

 

There is no way that i'm ther ony person to experience this????

 

Is an exhaust pipe touching the radiator? You may want to pressure test the cooling system. I will also copy your thread to the Forced Induction subforum to see whether you get useful replies there.

 

headgasket

 

New headstuds and headgasket. Sounds like you may be getting head lift.

Nevermind. You said you got new studs. ARPs or stock?

 

you can test coolant for exhaust gases. This would give you a definitive answer as to head gasket issues if you don't have white smoke or white junk in your oil.

A heat shield or turbo blanket would probably help you.

 

Sounds like head lift to me. Either that or a crack in the head near a valve seat.

 

can be head gasket cus yu pushing by boost pressure the coolant liquid now when yu open the coolant reservior there no air coming off??? if not check for white smokes when yu turning the car on and it getin warmer...and yu shud of use the termotac bak for better coolin on yur motor if its not a daily driven but this is only my opinion...

 

Wat?

 

Do a cooling pressure test first. Also if you remove your radiator cap like you said and see coolant bubbling out or flowing out, it pretty much head gasketblow.

 

I will do a cooling system test next...

When i take the cap off and the car is cold there is a big pressure relief... if i take it off while the car is running, the coolant doesn't flow.. if the radiator is full you can see small bubbles pop out...

The car doesn't smoke at all. i can't smell coolant at all. it idles perfect cold or warm. No coolant in my oil, and no oil in my coolant. all of the coolant simply ends up in the overflow tank. The head studs are OEM.

 

Wouldn't a leak down test show a crack in the head? And as far as head lift goes, does it happen at idle or just under boost? My overflow tank will fill up even if i drive the car and stay out of boost just not as fast of course.

I'm thinking of just replacing the head gasket and visually inspecting the head... and seeing what happens.... Are ARP head studs really that superior over OEM?

 

Sounds like head lift...due to oem head studs....I try to put arp head studs on anything I boost... even if its a low boost setup...good luck man.

 

As for ARP head studs are good **** hands down. Also try getting a new radiator pressure cap. Had a similar problem on my toyota 4-runner and the pressure cap fixed the problem, $10 later.

 

There's a couple of things I'd check. First I'd pressure test the cooling system. Autozone rents them for less than 100$. If it pressure tests good, I'd replace the radiator cap. If the problem persists, I'd point at too far advanced ignition timing causing high combustion/head temps. -Later, BR

 

I will do the cooling system check (cheap and fast check) but can i do the check without a thermostat installed? My radiator came with a new cap, and it was doing the same thing on my OEM radiator and OEM cap... so i'm rulling that out for now.

As far as the timing, wouldn't the problem start right away? to me it seems that something has worn out... i wasn't sure about the head gasket just because of the fact that leakdown test was perfect?

 

No, too far advanced timing wouldint take effect untill it reaches the point the cooling system can't keep up with cooling the head. Also, it may be advanced only around a certain rpm x vacuum reading. -Later, BR

 

Stock sleeves?

 

yeah, stock sleeves.

 

how many pounds are you on and what is your CR? i would invest in some ARP's.

 

9 pounds on low and 22 on high... sorry not sure what CR means?

 

CR= compression ratio. why the HELL are you using stock head studs with that much boost?

 

There's your problem right there.