changing plugs @ 280k?
Professional
Joined: Mar 2011
Posts: 130
Likes: 0
From: Mena, Arkansas
Shouldn't be any different than changing plugs any other time. Maybe a little more stubborn to come out.
Plugs dont necessarily have to be changed on schedule but they do need to be checked and at least cleaned and regapped.
For the cost in lost fuel mileage and loss of h.p. from misfires and weak sparks you coulda had them changed many times over.
As far as other ppl's opinion on a 200k mile plug change- YOU BOUGHT the truck, not them.
Don't know if a hemi uses wires or coil packs, but if you have wires then make sure the store has replacements. At that mileage those boots are bound to be 'welded' to the plug.
Plugs dont necessarily have to be changed on schedule but they do need to be checked and at least cleaned and regapped.
For the cost in lost fuel mileage and loss of h.p. from misfires and weak sparks you coulda had them changed many times over.
As far as other ppl's opinion on a 200k mile plug change- YOU BOUGHT the truck, not them.
Don't know if a hemi uses wires or coil packs, but if you have wires then make sure the store has replacements. At that mileage those boots are bound to be 'welded' to the plug.
Thread Starter
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Legend
Joined: Feb 2005
Posts: 8,058
Likes: 183
From: Fort Worth, TX
Shouldn't be any different than changing plugs any other time. Maybe a little more stubborn to come out.
Plugs dont necessarily have to be changed on schedule but they do need to be checked and at least cleaned and regapped.
For the cost in lost fuel mileage and loss of h.p. from misfires and weak sparks you coulda had them changed many times over.
As far as other ppl's opinion on a 200k mile plug change- YOU BOUGHT the truck, not them.
Don't know if a hemi uses wires or coil packs, but if you have wires then make sure the store has replacements. At that mileage those boots are bound to be 'welded' to the plug.
Plugs dont necessarily have to be changed on schedule but they do need to be checked and at least cleaned and regapped.
For the cost in lost fuel mileage and loss of h.p. from misfires and weak sparks you coulda had them changed many times over.
As far as other ppl's opinion on a 200k mile plug change- YOU BOUGHT the truck, not them.
Don't know if a hemi uses wires or coil packs, but if you have wires then make sure the store has replacements. At that mileage those boots are bound to be 'welded' to the plug.
With 800 pounds of stuff in the bed.
Captain
Joined: Sep 2009
Posts: 538
Likes: 0
From: Southern Louisiana
The best I could do with my 4.7 was 21 mpg, on a long trip, on new plugs with the wind pushing my tailgate. And that was only once, unloaded. Normal driving was 16.5 to 17 and since the 2" level and 33s I consider myself lucky to still get 15 mpg on a long run.
Nebraska is pretty hilly, but if I reset the average once I get up to speed I can get 20-22 going 60mph from town to town. Thats with a 4x4 QC hemi, 100k mi, no mods besides an air filter.
You may have to work at pulling the plugs due to some carbon buildup on the ends of the threads, when you put them back in---remember--these are aluminum heads---don't overtighten them--contact plus an 1/8 to a 1/4 turn more---or torque them.
Might be a good idea to replace the wires too, follow the overlay pattern for them--it important.
Its a good idea to get a 3/8" drive swivel head plug socket, makes the back 2 drivers side easier to pull.
Blow out each plug hole with compressed air prior to pulling original plug, wipe silicone grease on inside of each plug boot end before insertion.
I really wish some of the guys would save their flamework for their cars or trucks instead of this forum. We all have faults----just glad you came here for answers.
Hope this helps---get us some pics of those plugs--and maybe gap them too--just for fyi.
Good luck!!!
Might be a good idea to replace the wires too, follow the overlay pattern for them--it important.
Its a good idea to get a 3/8" drive swivel head plug socket, makes the back 2 drivers side easier to pull.
Blow out each plug hole with compressed air prior to pulling original plug, wipe silicone grease on inside of each plug boot end before insertion.
I really wish some of the guys would save their flamework for their cars or trucks instead of this forum. We all have faults----just glad you came here for answers.
Hope this helps---get us some pics of those plugs--and maybe gap them too--just for fyi.
Good luck!!!