You really have to have coolant in the system to pressure test. This way you can see the leaks. Some leaks may be so small as not to leak coolant but will easily leak air. All it may take is tightening up some hose clamps. As for the vacuum tee I think you mean the side of the tee which is connected to a fitting on the front right side of the intake manifold and is the vacuum source for the cannister and the power brakes. Your coolant leak can also be where the tester connects to the tank. Very common on a beat up tester. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Tom Tait" <TTait@xxxx> wrote: > I've just gotten my new water pump in, all new hoses etc. and am starting to > check the system for leaks. I'm using a pressure tester borrowed from auto > zone and clearly have a few leaks to find - am peaking out at 4 psi. > > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/