How old do these plugs look?

[Japanese]

All car spark plugs today come pre-gapped like those. You don't need to do anything with the ground electrode.

The last number in the plug designation (in this case 11) is the gap which should be 1.1 mm (0.044"). Measure it with a filler gauge and if it's larger than that, it will be good to replace the plugs. That gap looks to me 2 mm (0.079") or over.

The rust that shows on the lower part of the ceramic tells me those plugs are not that recent. However the positive electrode doesn't look that bad, but we don't know about the gap yet.

Those plugs should be about $120 (for 6 plugs) and they may have free shipping on sparkplugs.com.

 

[50yr Street Mech]

All iridium plugs must be checked for gap for the particular application. Believe me , I've gapped NGK's that were " supposed" to be gapped to my engine, but were not. Way off. CHECK THE GAP and adjust to engine spec. DO NOT go near center electrode, too brittle. Can't gap them like they are copper plugs. Bend ground electrode with vice grip. Be gentle when checking gap.

 

[jayjr1105]

I appreciate everyone's concern and I'm well aware that if the belt wasn't done at 100-110K it's overdue. These are all on my to-do list. Rock Auto has the Ruthenium NGK's for $10 a plug. I am ordering 6 of those and the Aisin Timing Kit. Worst case scenario my guy sees that the timing belt, water pump and tensioner WAS done and I sell the kit on ebay for a small loss.

 

[50yr Street Mech]

The timing belt change invoice should be with you're stack of maintainence records. I hope it was done for you're sake. You're making smart moves...Normally, if the serpentine belt was NOT replaced, the timing belt was not replaced either. Those two kinda go together because they wear at the same mileage, ( 100,000k ) That belt will give you an indication if the timing belt was replaced or not. Dry, cracking, gray color, squeaks. Very rarely do you change a Bando belt before 100,000k. Those are very good OEM belts. Now, if you see there is a Gates or something else in there, chances are the timing belt is still 2017. Gates or any other belt will never outperform a Bando in longevity.

 

[jayjr1105]

The timing belt change invoice should be with you're stack of maintainence records. I hope it was done for you're sake. You're making smart moves...Normally, if the serpentine belt was NOT replaced, the timing belt was not replaced either. Those two kinda go together because they wear at the same mileage, ( 100,000k ) That belt will give you an indication if the timing belt was replaced or not. Dry, cracking, gray color, squeaks. Very rarely do you change a Bando belt before 100,000k. Those are very good OEM belts. Now, if you see there is a Gates or something else in there, chances are the timing belt is still 2017. Gates or any other belt will never outperform a Bando in longevity.

It's just the carfax. I can share it here if anyone's interested... https://mega.nz/file/kDEGGCYS#97-vaWhRmFlsw27Ljz64kmueIIlZTP-WwTswGqj6B0A

 

[mikeduf]

Just wondering if anybody putting new plugs in does indexing on new plugs.

I like to mark the plug prior to taking them out to get a fix on the alignment of the electrode.
If it's running good with no misses I want to make sure I put plugs back in with the same electrode alignment.
Basically I don't like having my electrodes in all different directions.

 

[50yr Street Mech]

That's nonsense in my book. You torque them, Where they end end, they end up. Period.....As for the carfax, didn't mention anything about a timing belt, only new fuel injectors. The mechanic will find out when he opens it up if the belt was changed

 

[Japanese]

It's just the carfax. I can share it here if anyone's interested... https://mega.nz/file/kDEGGCYS#97-vaWhRmFlsw27Ljz64kmueIIlZTP-WwTswGqj6B0A

You may call Piazza of Honda, Reading, PA, to check if they have any documents on the car and get more familiar with its last maintenance before you bought it. Ask them if they have any info about the timing belt, water pump etc.

 

[50yr Street Mech]

That's a good idea . They should have invoice receipts on work performed on that vehicle Should be on the computer system., if no paperwork is found.

 

[JeffKeryk]

Just wondering if anybody putting new plugs in does indexing on new plugs.

I like to mark the plug prior to taking them out to get a fix on the alignment of the electrode.
If it's running good with no misses I want to make sure I put plugs back in with the same electrode alignment.
Basically I don't like having my electrodes in all different directions.

Only Uber high performance engines will see any gain at all with indexing. Makes zero difference on street driven cars.
But if it makes you happy, go for it.

 

[clinebarger]

Why wait till a failed TB belt tensioner ???? 25,000 overdue. Just get it done with a new tensioner now. Peace of mind.

Not what I stated.....The tensioner can be swapped without much hassle.

All the other factory timing components are known to last at least 200,000 & 10 years assuming no contamination of the belt.

If this was a Toyota UZ/MZ....Drive 'til water pump leak or 10 years

 

[TomYoung]

The vast majority of J35's that jump time is because a failed tensioner, The tensioner can be swapped out pretty easily.....This should extend the TB interval to 200,000 or at least to 2027 when the belt turns 10 years old.

Are you saying that you can replace the tensioner on a J35 and if you do that you can run a timing belt to 200,000 miles? I have never heard that before, but have heard many stories of belts giving out after 130,000 miles. I’ve owned quite a few of these absolutely excellent powerplants, and beseech people to stick to the 90,000 to 100,000 mile interval.

 

[clinebarger]

I'm saying the belt will last 10 years.