350 Chevy operating temp

[justimpact]

AIRLIFT. I have one as well. It is great for pulling a vacuum to verify that the system is leakproof before installing the coolant.

Yes it is good for checking the sys. for leaks but does not always work I have had several vehicles hold a vacuum but when cooling sys. is full and under pressure have leaked but for the most part it was human error or a freak of nature the vacuum leak test is acutaly one of fords aproved methods of testing EGR coolers on the 6.0L diesels