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Canadian Tire NGK spark plugs

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12K views 85 replies 32 participants last post by  nm9stheham  
#1 ·
My dealership is trying to sell me 2 NGK plugs for 50 dollars each but the same plug number at Canadian Tire is 19.99 each. Anyone know if there is a difference? Same brand, same number so I can't see how but figured I'd check here first.
 
#11 ·
its just in the position of the electrode, really if your torque wrench is off slightly even dealer bought plugs won't be indexed properly. another thing when it comes down to indexing is, every time you crush the seal of the plug its going to alter the positioning of the electrode when you apply the appropriate torque or if theres a little bit of oil on the threads from pulling out the old plug. might as well just give an extra 5 degrees of torque to line the plugs up. you likely wont strip the head and its going to be a negligible difference
 
#12 ·
Indexed??? I have indexed plugs before building race engines, but not sure how you could buy an "indexed" plug. Indexing from my understanding is the positioning of the electrode/gap inside the cylinder when installed. In engine assembly the plugs are either installed prior to assembling the head or by marking the plug exterior and using your mark as a guide when installing.

As far as the plugs go, they are the same as the Can Tires ones. Just confirm the gap is correct and buy the cheaper one.
 
#14 · (Edited)
NGK also uses a 4 digit PN:


I know in the past we bought 'for example' BR9ES plugs w/ 'stock numbers' like #1234. Yes you can probably use the CTC plugs, but I'll bet dollars to donuts that the 4 digit stock number won't be the same as the ones BRP (or the other OEMs) specs.

Also, I can't see if there is any notation in the PN if the terminal end is solid or threaded. Threaded ends need a slight crimp to prevent end from coming loose. I'm guessing the CTC plugs are likely the latter.
 
#19 ·
really though, we all should think about it, if these were all specced for etec engines and infact, indexed based on BRPs spec, wouldn't that mean that all plugs would line up in the same place on all engines? would also mean that Rotaxs manufacturing and threading heads is on point perfect with every engine head they make, which i highly highly doubt is the case.

get the plugs from CT if you don't want to spend that outrageous dealer price and just make sure you follow the spec and keep the plug with opening at 90 or 180 degrees with the injector
 

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#23 ·
really though, we all should think about it, if these were all specced for etec engines and infact, indexed based on BRPs spec, wouldn't that mean that all plugs would line up in the same place on all engines? would also mean that Rotaxs manufacturing and threading heads is on point perfect with every engine head they make, which i highly highly doubt is the case.
I've been away from CNC machining for over 30yrs, at that time the precision and multi axis abilities were outstanding. I do not see it being that difficult to orientate the spindle and the flute engagement of the tap so that the start of the thread is exactly where you want it on a circumference. Based on the thread pitch and number of threads you can specify to the spark plug manufacturer index position based on a specific torque.
brian
 
#22 ·
or princess auto, the mastercraft sockets have disappointed me recently, their lack of lifetime warranty now is a farce. and all the older tools that were sold as a lifetime warranty are no longer replaceable. i took a torque wrench in last summer to exchange one that stopped functioning and if it wasn't for the fact that i used to work there and spoke to my old manager, i would have been sent home with my broken wrench
 
#24 ·
Just to reconfirm the indexed spark plug thing... I know for a fact that BRP plugs are indexed properly. This means that the threads in the heads are always clocked correctly - which as Candubrain said above, was trivial more than 3 decades ago - and the threads on the spark plug are also clocked correctly, if bought from BRP.

What I don't know, is if all plugs will index properly. My guess is that the plugs are not CNCd, meaning the threads would end up all over the place. BRP likely pays NGK a premium to sort the plugs and send a portion of the ones that are properly indexed to them. Why do they do this?

Because on an ETEC, the plug must be indexed. And training your dealers and every mechanic in that dealer on this is a headache from a logistics standpoint that they can simply avoid, by passing the cost on to the consumer. It's zero cost for them and saves massive troubleshooting and tech support issues. So if you buy the plug from your dealer and torque it to spec, it is guaranteed by BRP to work.

Now, NGK might clock all of their plugs. They might CNC them. I have no idea, and as I mentioned to me it's just not worth it since the savings are almost non existent, and I don't mind supporting my dealer (which was the best reply on here, by the way...it's a dark day when my dealer doesn't exist and ONLY the guy at the cantire parts counter can get me plugs. Half the guys and gals working there literally don't know how to find plugs unless you give them year, make, and model, and "Skidoo" isn't in their system...ask me how I know ;) ).

Anyways, all I'm trying to say is that if you buy them from BRP, they are guaranteed to work. The shop manual literally has two different procedures for if the plugs are BRP or not - if they are BRP, you torque to spec because they are already indexed. If not, you have to index them yourselves. Again, they might work otherwise. Indexing is also pretty damn easy to do, and Leo is right that an extra 15-30 degrees of rotation probably won't hurt anything. But the ~$40 every three years is - to me - a worthwhile price to pay to support my dealer, and not worry about any of this at all.
 
#28 ·
Just to reconfirm the indexed spark plug thing... I know for a fact that BRP plugs are indexed properly. This means that the threads in the heads are always clocked correctly - which as Candubrain said above, was trivial more than 3 decades ago - and the threads on the spark plug are also clocked correctly, if bought from BRP.

What I don't know, is if all plugs will index properly. My guess is that the plugs are not CNCd, meaning the threads would end up all over the place. BRP likely pays NGK a premium to sort the plugs and send a portion of the ones that are properly indexed to them. Why do they do this?

Because on an ETEC, the plug must be indexed. And training your dealers and every mechanic in that dealer on this is a headache from a logistics standpoint that they can simply avoid, by passing the cost on to the consumer. It's zero cost for them and saves massive troubleshooting and tech support issues. So if you buy the plug from your dealer and torque it to spec, it is guaranteed by BRP to work.

Now, NGK might clock all of their plugs. They might CNC them. I have no idea, and as I mentioned to me it's just not worth it since the savings are almost non existent, and I don't mind supporting my dealer (which was the best reply on here, by the way...it's a dark day when my dealer doesn't exist and ONLY the guy at the cantire parts counter can get me plugs. Half the guys and gals working there literally don't know how to find plugs unless you give them year, make, and model, and "Skidoo" isn't in their system...ask me how I know ;) ).

Anyways, all I'm trying to say is that if you buy them from BRP, they are guaranteed to work. The shop manual literally has two different procedures for if the plugs are BRP or not - if they are BRP, you torque to spec because they are already indexed. If not, you have to index them yourselves. Again, they might work otherwise. Indexing is also pretty damn easy to do, and Leo is right that an extra 15-30 degrees of rotation probably won't hurt anything. But the ~$40 every three years is - to me - a worthwhile price to pay to support my dealer, and not worry about any of this at all.
Or you can skip this & have the ground electrode 'shrouding' the spark.

W/ the money you save buying your plugs @ CTC, you can buy one of these:

 
#25 ·
From the 2020 PAC:

Image


I know prior to 2018 when I was still running an SDI I thought the ECS plugs were pricy. 2004 was a costly year when the SDI was intro'd, as they'd foul a plug just looking @ the sled the wrong way...

Also I imagine the heads are CNC machined including the plug holes, so their accuracy might surprise you.
 
#32 ·
From the 2020 PAC:

View attachment 2011644

I know prior to 2018 when I was still running an SDI I thought the ECS plugs were pricy. 2004 was a costly year when the SDI was intro'd, as they'd foul a plug just looking @ the sled the wrong way...

Also I imagine the heads are CNC machined including the plug holes, so their accuracy might surprise you.
That's odd, not once did I ever foul a plug on any of my SDIs, including my '04.

I honestly can't say I've ever known anyone who has either.
 
#41 ·
This has been a hot debate over the years. Many people don’t believe that the threads in the cylinder head are cut specifically so that a plug that has the ground strap welded on in a specific spot will index properly every time. But that’s how it was designed, and that’s how it works. And we’re not talking about a few degrees, it’s a large window. If the ground faces the injector = bad. If the ground faces away from the injector = good.