Tuned up my 2012 Sienna

[LenZee]

Yesterday I spent 5 hours getting to the rear plugs, Changed all 6 coils also and went with the NGK Ruthenium plugs.
Has 109k miles and plugs could have went another 100k I bet. Intake valves had zero crud on them.

 

[BrendanC]

i’m always confused on why good OE coils get replaced. my truck has its OE coils from 2002/240k miles ago. i have a brand new set of densos for it when they quit however.

 

[LenZee]

i’m always confused on why good OE coils get replaced. my truck has its OE coils from 2002/240k miles ago. i have a brand new set of densos for it when they quit however.

The rear coils are a huge pain to replace. Not planning on doing it again ever. Keeping the old coils as spares.

 

[Zee09]

i’m always confused on why good OE coils get replaced. my truck has its OE coils from 2002/240k miles ago. i have a brand new set of densos for it when they quit however.

You must have never owned a VW.
OE coils when you're lucky go 30k miles

 

[Racer4]

The pictures of the valves are the cleanest I have ever seen, do you do anything special to keep them that clean?

 

[edyvw]

The pictures of the valves are the cleanest I have ever seen, do you do anything special to keep them that clean?

Yes, he bought port injected engine.

 

[Dave Hess]

You must have never owned a VW.
OE coils when you're lucky go 30k miles

Yeah, we had a Civic with 240K miles and no problems with OE coils.

 

[Zee09]

Yeah, we had a Civic with 240K miles and no problems with OE coils.

Yeah they shouldn't be an issue

 

[LenZee]

The pictures of the valves are the cleanest I have ever seen, do you do anything special to keep them that clean?

BP and Amoco gas with marvel mystery oil mostly, Sometimes Klotz UPLON when I find it cheap. And rarely Techron.

 

[edyvw]

Yeah they shouldn't be an issue

On VW that excessive heat kills them.
But then, at -30they heat up interior in no time, unlike Honda.

 

[KGMtech]

To my understanding, OEM coils have a easier life if the gap on the sparkplugs doesn't grow much from new. So replacing the plugs early is to extend expected lifespan of coils.