pressure test cooling system

[bansheejoel]

I know how to do it but how do i drain all of the water out of the engine? By blocking off the t-stat outlet and putting air into the t-stat inlet and putting pressure in will that tell me if my block is cracked? Thanks Do i have to take out my t-stat?

 

[Eric 3.7LX Alpha 1]

Re: pressure test cooling system

What are you working on? and the year as well?

 

[bansheejoel]

Re: pressure test cooling system

Kinda thought every marine inboard you would pressure test the same. Anywase the engine is a 140 3.0 and the year im not to sure. Its a omc not a mercruiser if that helps. Any help is greatly appreciated. Thanks

 

[dingdongs]

Re: pressure test cooling system

i pressure test heads only with water filling and totally block off all but a couple of outlets one to let air and water out and the other to fill head with water.pressurize to 30psi for 30 mins.any leaks will be visible by seeing water.