Changing Spark Plugs
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Senior User
Joined: Feb 2006
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Changing Spark Plugs
I am a newB and need some advice. I have a 2008 F250 Power Stroke 6.4 liter and I cannot figure out where the spark plugs are. I have 25K miles on it and want to change them out. Any advice?
Dave.
Dave.
Post Fiend
Joined: May 2006
Posts: 10,007
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From: Central Florida
Unless the world has flipped upside down on me, Diesel engines don't have spark plugs. The diesel/air mix is ignited by compression (as long as the heads are up to operating temp.) Diesel spark plugs are joke we used to pull on new people when a tractor wouldn't start right up.
Elder User
Joined: Aug 2007
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From: Saskatoon, SK, CA
Elder User
Joined: Aug 2007
Posts: 914
Likes: 1
From: Saskatoon, SK, CA
Diesel combustion is done by pressure and not by spark. Larger diesel engines and some direct injection diesel engines don't require glow plugs.
New User
Joined: Dec 2008
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Well. First you should find the johnson rod. it is inside of the canuter valve...look up about 5 inches and you will be sparkplug number one...to make sure you sparkplugs are getting lift to port closure you should removed it and chatter test the plug....make sure your engine is at top dead center #5 then pull the spark plug...hope this helps!!!!!!
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