Dumb coolant pressure test question

[Hatterasker]

Morning,

Sorry for the dumb question, but can I safely do a coolant pressure test without coolant in the system?

It seems logical to check for leaks before the coolant is added after replacing the radiator, some hoses and a rear-heater delete.

I appreciate the help.
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1990 Vanagon Westfalia

[brickster]

It would be safe, but more difficult to find leaks in real world conditions. Air compresses differently than liquid. Don’t pressurize over 15-17 PSI.

[Crankey]

Seems logical to me, with a spray bottle of water/dish soap on all the hose clamps to check...
If you'd already filled with coolant but found a reason to take off a hose down low...that would suck to dump it all out to deal with the errant clamp/hose or whatever it is.
Good luck if you try it !

[Hatterasker]

Thanks, Brickster. I kind of thought that. I'll do a preliminary check w/ just air then do it again with coolant.

Now I just need to find that expansion tank to pressure tester adapter locally. If anybody in Seattle knows where, let me know. I'll do my own hunt, though.

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1990 Vanagon Westfalia

[Ahwahnee]