How many miles on your platinum plugs?

[Tim]

My wife wanted to buy a new Sienna in '98. I was worried about changing plugs on a transverse V-6.

Then I found out it had platinum plugs from the factory, so I relented 'cause I figured it would be quite a while until I had to mess with them.

We have 131,000 miles on the van, it still gets the same mileage as when new, idles and runs smooth as silk...same original plugs. Wires, too!

I never would've believed it if you told me 7 years ago.


Tim

 

[k1xv]

Platinum plugs, it seems, work until they physically fail, such as a shell to porcelain leak. The scheduled change is, as I understand it, based on the concept of changing them before the failures, if any, actually occur.

The second reason for the scheduled change is to get them out of the holes and replaced with new ones so that they do not "corrode" into place and become very difficult to remove.

I presently have a set with about 105K miles on them in a '91 Infiniti Q45 and they are still OK (knock on wood).

 

[Al]

quote:

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Originally posted by k1xv:
The second reason for the scheduled change is to get them out of the holes and replaced with new ones so that they do not "corrode" into place and become very difficult to remove.

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Bingo. Once they are in there for more than 50K the risk of a bad experience goes up. I changed the ones on my Sentra at about 35K and went to Bosch +4's ..(Yes I know lots of folks hate 'em. But they have worked very well for me in about 6 different applications.)

 

[seotaji]

i have a little over 130k before i replaced the ones in my van. didn't have a problem getting them out, it was moving all the other crap and bending myself into a pretzel that was the problem.

THANKS DODGE for your wonderful engine/accessory layout.

 

[haley10]

quote:

---

Originally posted by k1xv:
Platinum plugs, it seems, work until they physically fail, such as a shell to porcelain leak. The scheduled change is, as I understand it, based on the concept of changing them before the failures, if any, actually occur.

The second reason for the scheduled change is to get them out of the holes and replaced with new ones so that they do not "corrode" into place and become very difficult to remove.

I presently have a set with about 105K miles on them in a '91 Infiniti Q45 and they are still OK (knock on wood).

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I agree. Internal failures mainly. Wait for it and you will need a new wire set. Change on schedule and your wires aren't at risk.

 

[Tim]

I'm gonna see how far these babies will go!

If I go to the trouble of changing the plugs, at this stage of the game, I'll be doing the wires too, anyway.

What I'll save on plugs I way more than spend on oil, that's for certain (insert sludge graemlin here).

Tim

 

[Brett Miller]

The big question is will they come out when the need changed. I never leave plugs in more than 40,000 to 50,000 at a time. If they are still good I put some antiseeze on them and reinstall.