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New spark plugs needed at 100K miles?

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#21 ·
kevin512 said:
As somebody who purchased the Mopar Lifetime warranty, not sure that approach makes sense for me. The spark plugs are a scheduled maintenance item, but the coils and oil cooler would be covered by warranty. Are the Pentastar coils frequently replaced? It has been 15 years since one of my cars needed a new coil pack, that includes two vehicles that were north of 200K miles without ever replacing a coil.
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With a life time warranty, I tend to agree with you. But ignition coils are in fact "wear" items, their performance does degrade with time and heat cycles - they will eventual fail.
 
Discussion starter · #22 ·
Chase300 said:
Looks like the Pilot has some oil control issues....I assume its burning oil?
Have you had the valves adjusted on it?
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Guessing this Pilot is between 2008 - 2013. Honda V6 engines between those dates commonly had oil consumption issues related to the Variable Cylinder Management (VCM) system. I had an '09 Accord with the same problem, Honda eventually replaced the short block under warranty.
 
#23 ·
Yep I had an 09 pilot I traded in in December. There was a class action lawsuit against honda for oil consumption issues in the vcm engine. Although my 18 drt cylinder mgmt system is different, I think Im scarred from the pilot and always leave it off on the D. But if I remember right hondas design allowed the cylinders to cool too much as the pistons wouldnt fire in eco mode. Supposedly its updated now for Honda but I dont think you can turn the system off or on now like the D - you couldnt in the 09-16 pilot.
 
#25 · (Edited)
Any overhead cam engine with direct action camshaft lobe on inverted bucket design (with shims) will need adjustment. This is not the case if the design uses a direct action hydraulic roller follower or a rocker roller. There are a lot of those engines out there, some of them are falsely noted as never needing adjustments or the procedure not being noted in the manuals. Some clearly calling out the required maintenance procedure with intervals noted as low as 30K or 60K miles in some cases. With the lower levels of ZDDP in the latest couple updates on motor oil (namely SM and SN) this has the potential to becoming a bigger issue due to increase wear on those camshaft lobes and direct contact bucket shims, same as with older push rod engines that use flat tappet valve lifters.
 
#28 ·
kevin512 said:
Update:

Changed the spark plugs on my '14 V6 Durango at 99,960 miles.

They still look pretty good to me.

View attachment 104526

Replaced with OEM plugs:

View attachment 104528
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Did you check the gap on those used spark plugs? The ones I just pulled out of mine @ 72.4K miles had a gap opened up to 0.049 to 0.050" from the factory setting of 0.043". The wider the gap, the harder the coil has to work.
 
Discussion starter · #29 ·
DeaconBlue said:
Did you check the gap on those used spark plugs? The ones I just pulled out of mine @ 72.4K miles had a gap opened up to 0.049 to 0.050" from the factory setting of 0.043". The wider the gap, the harder the coil has to work.
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I did not. If I can locate my spark plug gap tool I will check it, but haven't seen that device in a while.
 
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