Question about Napa Block Tester | Ford Explorer Forums

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Question about Napa Block Tester

mustnged

Member
Joined
August 28, 2012
Messages
20
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City, State
Las Vegas
Year, Model & Trim Level
2004 Explorer XLT V8
My car recently overheated and it is temporarily running on just water with no coolant.
I want to try this block tester to see if I have a blown head gasket
universal-combustion-leak-


Will it work with no coolant? Or do I need coolant for the test to give me an accurate reading?
 






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