Spark plugs

[Denalibro76]

Hi all, I’m trying to find out the AC Delco part number for irridium spark plugs for my LQ4. Shopping on Amazon is a headache sometimes when it says it’s not the correct one for my vehicle. Also, should I be going with iridium or platinum or?

 

[iamdub]

I believe the part numbers you wanna search are #12680072 or #41-162. James @swathdiver might be able to confirm. I'd shop for the NGK equivalent as well. IMO, whatever came in it from the factory, platinum or iridium, will be perfectly fine and you'd notice no difference whatsoever between either.

IMO, don't buy them off Amazon unless you can ascertain that they are genuine. Amazon is or was flooded with counterfeit spark plugs. Generally, if their price is too good, they're probably fake.

 

[swathdiver]

I believe the part numbers you wanna search are #12680072 or #41-162. James @swathdiver might be able to confirm. I'd shop for the NGK equivalent as well. IMO, whatever came in it from the factory, platinum or iridium, will be perfectly fine and you'd notice no difference whatsoever between either.

IMO, don't buy them off Amazon unless you can ascertain that they are genuine. Amazon is or was flooded with counterfeit spark plugs. Generally, if their price is too good, they're probably fake.

Curiously, ACDelco and RockAuto do not list that plug for an LQ4. They recommend the 41-962/19299585 Double Platinum as the OE plug.

They also show the old school R44LTSM/19354418 and the ACDelco Professional 19307137 Rapidfire. All with a .040 Gap.

As Chris stated, be VERY cautious buying from Amazon, Amazon sellers and from ebay as counterfeits abound and they are wrecking engines. I'd recommend a dealership, Summit Racing or Rock Auto, the latter being my usual first choice.

 

[Fless]

My '04 5.3 came with 41-985s. I inquired directly to ACDelco about the unavailability of those, and this is the response I received:

"Regarding your inquiry for spark plug for VIN [cut], we show the correct part number to be 41-962. The 41-985 are discontinued and they do show to supersede to 12621258 which is not available and they are no longer recommended for your vehicle. The engineers have made the change to the new spark plug.

If you have any other questions, please feel free to contact our experts at the ACDelco support center by dialing 1-800-ACDELCO (223-3526).

We appreciate your business.

Regards,

ACDelco Internet Response Team"

So the updated spec is for double platinums, but others on here can list the correct iridium plugs that are equivalent to the discontinued OE 41-985s.

 

[Denalibro76]

I believe the part numbers you wanna search are #12680072 or #41-162. James @swathdiver might be able to confirm. I'd shop for the NGK equivalent as well. IMO, whatever came in it from the factory, platinum or iridium, will be perfectly fine and you'd notice no difference whatsoever between either.

IMO, don't buy them off Amazon unless you can ascertain that they are genuine. Amazon is or was flooded with counterfeit spark plugs. Generally, if their price is too good, they're probably fake.

Ok! Thanks! Good to know. Yeah I was noticing the prices and thought it was really cheap. Like 90$ for plugs and wires

 

[Denalibro76]

Curiously, ACDelco and RockAuto do not list that plug for an LQ4. They recommend the 41-962/19299585 Double Platinum as the OE plug.

They also show the old school R44LTSM/19354418 and the ACDelco Professional 19307137 Rapidfire. All with a .040 Gap.

As Chris stated, be VERY cautious buying from Amazon, Amazon sellers and from ebay as counterfeits abound and they are wrecking engines. I'd recommend a dealership, Summit Racing or Rock Auto, the latter being my usual first choice.

Thanks! Yeah I won’t be buying from Amazon.

 

[swathdiver]

Thanks! Yeah I won’t be buying from Amazon.

Was just cruising ebay and they are selling whole sets for $22! No thanks, I like my motor!

 

[Tonyrodz]

I bought plugs off amazon a few years ago--DON'T DO IT!

 

[PNWYukon]

NGK 7397 Iridiums and Denso wires 6718063 from RockAuto. Cost about $80 and they perform flawlessly.

 

[iamdub]

Curiously, ACDelco and RockAuto do not list that plug for an LQ4. They recommend the 41-962/19299585 Double Platinum as the OE plug.

They also show the old school R44LTSM/19354418 and the ACDelco Professional 19307137 Rapidfire. All with a .040 Gap.

As Chris stated, be VERY cautious buying from Amazon, Amazon sellers and from ebay as counterfeits abound and they are wrecking engines. I'd recommend a dealership, Summit Racing or Rock Auto, the latter being my usual first choice.

That's why I tagged you in! My quick Google search led me to Summit. I thought surely they'd have their stuff together. But, here's yet another lesson learned in this thread. Thank you for trying to teach me, sir! Don't give up on me!

 

[iamdub]

Ok! Thanks! Good to know. Yeah I was noticing the prices and thought it was really cheap. Like 90$ for plugs and wires

That ~$50 you're saving may very well cost you thousands. I bought my NGKs back around the end of 2019 off ebay. I had the seller email me current/actual pics of the plugs in the listing: Pics of the two 4-pack boxes, the individual boxes and of the plugs themselves.

 

[Ventura139]

Curiously, ACDelco and RockAuto do not list that plug for an LQ4. They recommend the 41-962/19299585 Double Platinum as the OE plug.

They also show the old school R44LTSM/19354418 and the ACDelco Professional 19307137 Rapidfire. All with a .040 Gap.

As Chris stated, be VERY cautious buying from Amazon, Amazon sellers and from ebay as counterfeits abound and they are wrecking engines. I'd recommend a dealership, Summit Racing or Rock Auto, the latter being my usual first choice.

Hey question for you. Somewhat on the same topic. How often would you recommend tune ups? I have NO check engine lights but am thinking about doing a minor before the winter. Spark plugs etc…. Thanks

 

[swathdiver]

Hey question for you. Somewhat on the same topic. How often would you recommend tune ups? I have NO check engine lights but am thinking about doing a minor before the winter. Spark plugs etc…. Thanks

Well, the Iridium plugs are good for 100K miles. One of my wires fell apart after 50K miles. So I reckon we'll go to 50K or 75K mile intervals from now on and continue with the annual checks. We pull a plug on each side once a year.

 

[Dantheman1540]

Any way to determine knock-offs vs actual NGKs? I run amazon TR55 or TR6s and always buy from amazon but they are clearly labeled as NGKs and the box looks legit. Haven't ever had issues and I buy the cheap copper ones. Usually less than $20 for a set of 8.

 

[iamdub]

Any way to determine knock-offs vs actual NGKs? I run amazon TR55 or TR6s and always buy from amazon but they are clearly labeled as NGKs and the box looks legit. Haven't ever had issues and I buy the cheap copper ones. Usually less than $20 for a set of 8.

The point of cheap counterfeits is to be able to produce them cheaply enough that a profit can still be made even when selling it much cheaper than the genuine version. This requires sub-par manufacturing methods and materials, even down to box quality and the print quality of the box labels.

All you gotta know is what the real stuff looks like:

 

[Dantheman1540]

The point of cheap counterfeits is to be able to produce them cheaply enough that you can still make a profit even when selling it much cheaper than the genuine version. This requires sub-par manufacturing methods and materials, even down to box quality and the print quality of the box labels.

All you gotta know is what the real stuff looks like:

Dang after watching both videos I want to pull a few plugs and inspect them closely. Crazy how good the counterfeits are!

 

[avalonandl]

AC Delco shows 41-162 Iridium

 

[iamdub]

Dang after watching both videos I want to pull a few plugs and inspect them closely. Crazy how good the counterfeits are!

You might be on the verge of killing your engine and not know it!

 

[Dantheman1540]

View attachment 355130


You might be on the verge of killing your engine and not know it!

Im always in the verge of killing it

 

[Rocket Man]

The dead giveaway is $10 plugs going for $3.50.