Hi a make a 12a with j brigde porting. Cause the bridge is to big yu known you need to porting the area where the water seal goes. I do it also I match it with porting n the rotor housing for better performance I seal al the area near this work with marine tex and silicone in the rotor housing surface. Until now I did not have any prolem but the Engine was no nor for long time yet. but I fill the engine with coolant and water does not enter to the rotor housing. Only I see a little of humidity in the oil filling cap. I dont know why maybe a alittle bit on humidity inside the oi pan. I hope it does not be something bad.. If any of you can tell me some causes of humidify inside the engine oil cap I will thanks. Only to make my feel less nervous... I know conndensation problems also is the first start of the engine... but anything you can help me let me know

 

This is actually pretty common on most older engines. Every once in a while you will find condensation inside the oil cap. It is more common when all of the emmisions stuff has been removed and not everything has been capped off. The air inside the crankcase coold down after shutdown and sucks air humid air into the crankcase and condenses in there afetr complete cooldown. Do this 50 times and take short trips and the problem will only be worse.



If you are not seeing the water level in the radiator drop or change colors then water is not leaking out of the coolant system.



Dale pa'bajo y no te preocupes con eso.