jerrym
GenI
 
9/13/2014
23:18:00
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 Subject: 4.7 liter spark plug question
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Message:
Hello,
Getting ready to change the spark plugs in my 2000 4.7 liter Dakota.
When pulling the spark plug coil/tube assembly from the plugs, I notice the rubber o rings at the bottom are really dry rotted and falling apart on some plug tubes. So before removing the plugs, I am going to blow air into the head before removing the plug to prevent debris from getting in the cylinder.
My question is, what exactly do these o rings do and are they needed. If they only keep dust out of the plug hole I might not replace them.
Went to the dealership to see if you can buy the o rings, but they only sell the whole coil/plug by itself.
Has anyone experienced this, or have any ideas?
Thanks!
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