Tuned up my 2012 Sienna
- Thread starter LenZee
- Start date
BrendanC
$100 site donor 2024
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.
- Joined
- May 5, 2018
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The pictures of the valves are the cleanest I have ever seen, do you do anything special to keep them that clean?
edyvw
$50 site donor 2026
Yes, he bought port injected engine.
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.
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- May 5, 2018
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Yeah they shouldn't be an issue
BP and Amoco gas with marvel mystery oil mostly, Sometimes Klotz UPLON when I find it cheap. And rarely Techron.
edyvw
$50 site donor 2026
On VW that excessive heat kills them.
But then, at -30they heat up interior in no time, unlike Honda.
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.
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- May 16, 2022
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A few years back I enjoyed as a hobby buying used retired Police Crown Vics at auction. After buying 6 or 7 the Country Garage shop manager got to know me and we would talk all things Fleet cars and trucks. He maintained hundreds of Crown Vics and told me he was having a problem with the coils going out early when doing the suggested 100K spark plug changes. He changed the plugs to a 60K service across his fleet and the coils failing was no longer a problem. The last year of the Vic was around 2012 and I asked him how the new Tahoe and Ford products we doing as Crown Vic replacements and he gave me that look...shook his head, He suggested and I agreed THE Crown Vic was the best car ever made!
