Spark Plugs Extra Tight
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Amateur
Joined: Jul 2013
Posts: 45
Likes: 1
From: Rochester NY
Spark Plugs Extra Tight
Ok, purchased a used 2000 with the 3.9L . Tried to change the plugs in my this weekend and could not break the plugs free. Any suggestions on how to get them free without breaking the block or stripping out the threads. Truck has 91.000 and probably original plugs. Was using a 3/8 socket wrench, 8 inch extension and even put a piece of pipe on wrench and applied a bit of torque and could not break free, bet there is some rust holding the plug, I stopped before I broke a plug or worse. The engine was cold. Thinking of spraying a bit of penatrating oil around the plug the night before and try again the next day. Any hints would be a help.
Agree
After penetrating fluid at least a day, try it with the engine warm (hot).
Rookie
Joined: Oct 2013
Posts: 64
Likes: 0
From: Langley AFB, VA
I have a 99 Dakota 5.9l. I tried to replace them and found where the wires go from the distribution cap but cant get the wires off to get to the spark plugs. Should I also oil that to get to the plugs themselves or is there some way that the plug wires come off easy?
Champion
Joined: Jul 2011
Posts: 4,895
Likes: 35
From: Gilbert, Arizona
Sounds like whoever installed the wires last time forgot to coat the sparkplug boots with lube. No lube can cause the sparkplug boots to literally glue to the sparkplugs.
Only cure is twist the boots and try to get them off if not you will need to pull as hard as all Heck till they rip off the sparkplugs.
No amount of anything will loosen this problem up the sparkplug wires are fused to the sparkplugs
Only cure is twist the boots and try to get them off if not you will need to pull as hard as all Heck till they rip off the sparkplugs.
No amount of anything will loosen this problem up the sparkplug wires are fused to the sparkplugs
Professional
Joined: Sep 2012
Posts: 208
Likes: 1
From: Bristol, VA
BE VERY CAREFUL WITH THOSE PLUGS. I speak from experience here. I changed the plugs on mine and one broke. The plug itself came out put the thread part stayed in the engine. 1500 bucks to remove the head and have the plug removed at the machine shop.
use some penetrating oil for a week or so then try it again. The other suggestions here are excellent so do them all if you have to. Good luck and be careful.
use some penetrating oil for a week or so then try it again. The other suggestions here are excellent so do them all if you have to. Good luck and be careful.