blood69

Hi,
having a coolant pressure problem on my EDM 92 Sol with B16a2 from factory.
First notice this a couple of mouths ago, no overheating but started to notice coolant on the top of the expansion tank, notice the cap was starting to crack around it, so i re-forced it with Wurth bond around.
After a weekend of spirited drive notice that the same was happening, so i decided to change the Radiator Cap with the stock 1.1bar, checked the upper and lower houses and they where both hot. The Thermostat was changed 4 years ago and i guess its working. The radiator was changed 2 years ago because the old one was starting to leak.
No "Maionese" on the Rad Cap neither on the Oil Cap. Also inspected inside the valve cover and no white anything inside nor on the Dip Stick.
Did the cold engine with Rad cap off Test and no Bubbles, just notice that the coolant went a tiny bit down on the next day.
My main concern is if after a big spirited drive, the Radiator houses looks like they are going to Explode and the Summer is coming.
What i think its happening is i might have a tinny Crack on the Head Gasket that just leaks combustion gases to the coolant circuit without loosing coolant to the combustion chamber. Is this logic correct ? Is it possible to happen ?
My next step should be to change the Thermostat, but after that it just leaves the Head Gasket to change. Please am i missing something here ?

mk378

Put a pressure tester on. If the hoses swell up or parts leak under normal pressure, replace them.

eghatch9295

iTrader: (1)

i agree with your guess. try to find a block tester, it has a chemical that will change color if exhaust gases are present in the coolant.

blood69

I have thought doing the test, but where i live, it's going to be a hard to find one test kit to borrow. Guess i'm going to have to spend some money on a CO2 tester. Can u guys point me to a good one ?