Pulled the 3 front plugs and they all look similar to this one. This is on a 08 nissan quest. The entire intake has to be removed for the back 3...opinions on whether these are worn enough to attempt this job...I've done it before and it's a pita.
Vq35 spark plugs
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Pulled the 3 front plugs and they all look similar to this one. This is on a 08 nissan quest. The entire intake has to be removed for the back 3...opinions on whether these are worn enough to attempt this job...I've done it before and it's a pita.
How long have they been in service? If they were on for 100k, they look good. If they were only on the car for 30k, that's bad
If you do change them, use iridium or even ruthenium.
If you do change them, use iridium or even ruthenium.
Since you have no idea about the previous maintenance history I would change out the back ones regardless of how good or bad the front ones may look. It isn't just the tip condition it's also the ability to remove them from the head after a prolonged period.
And from your picture they don't look that great to me.
And from your picture they don't look that great to me.
They could be original. Change them, along with the valve cover gaskets
Use NGK Ruthenium or Denso Iridium TT or Iridium LL
I changed the factory plugs in my VQ35HR at 105-115k miles (have to look it up for exact mileage) and they were in pretty good shape. I checked the gap on all (6) and they were within spec including 3-4 that were spot on at 0.044". I noticed no difference in driving nor improved fuel economy after changing them either. Those could definitely be the factory-installed plugs at 167k, IMO.
Used and with 167k miles, I wouldn't trust the front three to accurately represent the condition of the rear three. Who knows how many times the fronts have been changed while neglecting the rear.
I havent really thought about that..
I've decided to commit, slowly but surely this intakes coming off.
I feel like theyre the factory plugs. Im getting the vibe I'm the first one to do this...pcv was oem brand, no cut wire ties, no broken plastic connectors..
JTK
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What's the rest of the van like? If it's very rough, but not having spark related issues, why bother changing them?
Like you say, quite a bit has to be pulled out of the way to get at the rear bank on these vans.
Like you say, quite a bit has to be pulled out of the way to get at the rear bank on these vans.
JTK
$100 Site Donor 2025
It's all worth it then!
I didn't realize Nissan included the stupid locking cap on the ATF dipstick tube on the older quests with the 5spd auto. That was nice of them.
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