- Sep 11, 2017
One line goes to the water pipe and the other to the back of the thermostat housing. Take one off and put it to the other. Compression test will test how much pressure you build in a cylinder. Leak down test will tell you where the compression is leaking to. If you’re not seeing smoke, it’s not getting into the combustion chamber.I don't wanna sound dumb but how do I loop the heater core lines to check? And wouldnt me doing a compression test tell me if I'm leaking also? Just asking. Thanks for all the help. I'm gonna look under the dash tommro and see if maybe the carpet is wet. Also my car dosnt have AC.
Yeah this has gone left. LolAs this thread is no longer about starting please ask new questions in a new thread. Thanks.