Head Gasket Problem Or Not? Help

[panos]

Recently I Bought A Nissan 300zx Tt European With An Engine Problem.
I New About It And I Pland Of Replasing The Engine As I Did With The Same But Japanis Inport Moter.everything Seemed Ok Until The Second Day Of Driving The Car.i Had Temperature Problem.i Cheked The Fun Clutch Cleaned The Radiator , And My Mechanic Took Of The Thermostat For The Time.the Temperature Is Not Rising Any More But After A Few Kms Of Driving The Car It Puts To Much Pressure In The Cooling System And Im Loosing Water From The Radiator Cup To The Reefiler I Loose Most Of The Water After 20 Kms.the Pressure Stays In For Hours Not Going Doun Even When Cold.the Water Seems Clean No Problem In Idle No Water Mixed With Oil No White Smoke No Bubles. (no Thermostat).does It Sound Like A Head Gasket Problem?

Please Help

 

[1993eclipseGS]

I cannot really understand your post. Go from cheapest up. First, put your thermostat back in. Then fill with water/coolant and let the car warm up without the cap on. Burp the system and add coolant/water as needed. Once the coolant/water starts coming up to the "rim "with the car warming up, Let the t-stat open and ad water if needed until it's at the top of the ''rim''. Then put the cap on. I would suggest buying a new thermostat to install, And also install a new cap.

 

[panos]

Thanks Eclipse I Did That Accept From Puting The Thermostat Back On Yet .it Seems A Litle Better .what Is The T-stat By The Way?what Hapends If There Is Stil A Small Amount Of Air Traped In The System ?

 

[Talesin]

If you suspect it to be one of the pistons leaking into the coolant, take off the radiator cap and have someone watch it while you start it. If it's from a cylinder, it will rhythmically rise or squirt up. Usually you will also lose a lot of coolant on a regular basis, and/or end up with bubbles in the coolant from the engine return line if you let it idle with the radiator cap off for a minute or two. You should always run with a thermostat, but it will not dictate coolant system pressure. If you don't have a thermostat, the engine will just never get to proper operating temperature.

Unfortunately, a DSM and a 300ZX TT don't have much in common.. I4 versus V6, and single versus twin turbo. You might have better luck diagnosing it on a 300ZX forum.

Also, every word does not need to be capitalized.