3 denso and 3 ngk spark plugs any clues to y?

does anyone kno y toyota use 3 denso and 3 ngk i asked the guys at toyota parts and they dont kno either but its wats there suppose to use wen replacing plugs because i plan on putting better plugs in my tacoma and was just gona put all the same brand but if toyota does this with the stock truck then it must be for some brilliant reason does anybody know anything


any ideas ?

 

I have wondered as well- Maybe it has to do with contracts Toyota has with the manufacturers. They might have an agreement to install 50/50. I have heard either set of plugs works fine.

 

prob assembled in different areas there all like that even some of the first gen too... i went alll ngk

 

IIRC, someone posted an actual "reason" of some sort explaining this seemingly silly shit but cannot remember what it was.

 

Yes, but the reason is......???????

 

Which leads to the next question........Why would the engine need less resistance on one side?

 

Could be timing control or EMI prevention. Kinda like how surround sound systems delay signals to the close speakers so the distant speakers have time to catch up (on the order of milliseconds..so not a huge deal)

 

not saying this is the reason, but from an economic perspective, having multiple suppliers is a good thing. a few years ago a japanese piston ring manufacturer was affected by an earthquake and a bunch of auto plants had to shut down because they didn't receive piston rings. having two vendors is a smart idea because lets say there was a delivery problem on the ngk side, there is still a supply of denso allowing production to continue.

 

NGK irridium Spark plug rock! jejejeje, combined with NGK performance wiring...
Engine will run smoother and you will not need to gun it when getting in the HWY.

 

i have a friend that is an engineer with the tacoma group. he said he works on the interior, but his friends are in the engine dept. i asked him when he came into town for thanksgiving. he promised to ask around, and hopefully come back with a sensible answer. he flew back to san antonio yesterday.

i'll post up if/when i find out.

 

equal opportunity

 

There are lots of threads on this. Just the way it is.

 

NO NO NO do not put those plugs in! Just put the standard type in. Get them from Toyota. They are already gapped. Worked for Toyota as a service advisor for years. USE TOYOTA PARTS!!!

 

meh a plugs a plug. As long as you use the same type and they are gapped properly you're fine. You dont HAVE to buy your plugs from toyota. I have heard of some problems with the iridiums in the v6 though.

 

Agreed, the plus aren't made by toyota, they are made by NGK and Denso...whats the difference in buying the same plug from an auto parts store vs. the dealership....oh wait I know...THE SAME PLUG costs much more at the dealership.

I like to use mostly OEM parts when I work on vehicles however I am not going to get ass-raped by a dealership when I can get THE SAME PART somewhere else for much cheaper. Not to mention our parts department at my local dealer closes at 6pm which means I have to leave work early to get there before they close if I need a part.

 

I'd like to hear what he has to say. My dad's a retired Toyota mechanic and he said all the V6's in every Toyota model came that way even in the 90's. So it goes back at least a couple of decades now. He said it had something to do with supplier contracts and figured it was a sure way to guarantee they used an equal number from both. But I don't know where he heard it from and whether that is true or not.

 

Never had to check a plug from dealer. A couple of bucks more. When you see what people do to their cars at a dealership day in and day out with AFTERMARKET PARTS. Trust me. A few bucks more for a part that is MADE for your vehicle not made for a couple of hundred. Make a friend at dealership. Tell them you work for another dealer and they will usually hook you up. Give it a try.....

 

Interested

 

Generally speaking, I agree. OEM parts are usually higher quality than aftermarket parts with better fitment.

There are exceptions of course, and sometimes OEM doesn't offer something with the capability you're looking for. Just remember, quality aftermarket is EXPENSIVE, so if the price is low, you're fucking up.