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Overheat, check for blown head gasket

Tiny
PETE ALLPORT
  • MEMBER
  • 2016 FORD EXPEDITION
  • 5.9L
  • V8
  • 2WD
  • AUTOMATIC
  • 20,000 MILES
This is a ford v8 in a boat actually. The boat was taken out first time this year, and within ten minutes was at 230 temperature. Was shut down, and found water was not getting from lake into engine cooling system. Want to know, when I remove spark plugs and crank engine do spark plugs need to be kept on ignition wires so the coils can keep firing built up energy? I have accidentally burned out motorcycle coil by not doing this. I know how to do rest of testing procedure. Thanks
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Sunday, May 19th, 2019 AT 1:49 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

To do a compression test all the spark plugs should be out of the engine. The coils or plug wires are going to be off the spark plugs when they come out, so the coil(s) being able to discharge is of no concern. I have included a couple of links below for you to go to:

https://www.2carpros.com/articles/how-to-test-engine-compression
https://www.2carpros.com/articles/head-gasket-blown-test

Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Sunday, May 19th, 2019 AT 2:16 PM

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