It comes from a factory defect with over pressurization. Its just one of those things you have go deal with.
The thread on cap on the coolant reservoir is the " radiator " cap
There is not a raditor cap. Only the cap on the over flow bottle.
The thermostat is going to be located in the raditor. Use extreme caution when taking the raditor cap off to advoid burns from boiling antifreeze. Once the raditor cap is taken off you shuld see the thermostat. Just pull out to remove, or push hard to install.
As of July 2014, the market cap for Integra LifeSciences Holdings Corporation (IART) is $1,550,516,012.64.
They should be runnin about 4-7 psi depending on what cap you buy
Either on the top of the radiator , or it is a threaded style cap on the coolant tank ( you don't mention the year )
1 3 4 2
thermostat stuck in the closed position, or blown head gasket, to check remove the raditor cap when the engine is cold and then start the engine if you see large bubbles coming out of the raditor the head gasket is bad
if i am not mistaken there is no "raditor cap" The cap that vents the radiator is on the overflow canistor. usually plastic, usually black. use the same safety precautions, getting burnt in not uncommon. do this when the engine is cold if possible. hope it helps. duboff
my 97, 318ti did the same thing, replaced every thing, spent 3 weeks tring to solve problem. new raditor but used my old cap. my old cap didnt hold the pressure needed. bought new $15 cap. so for now the raditor cap was the problem. now i have to solve the problem with my drivers side window comming off track.
Remove the bolts that hold the distributor cap onto the distributor. Once this is off the rotor can be reached and replaced on a 1994 Acura Integra.
Try bleeding the system. Sometimes there's a valve or sometimes you just open the raditor cap or reservoir