Cadillac STS-V Series Forum Discussion, spark plugs in Cadillac V-Series Forums; I was told that the ngk tr7 is to cold of a plug for the sts v.. any truth to ...
spark plugs I was told that the ngk tr7 is to cold of a plug for the sts v.. any truth to that? Re: spark plugs Nope. Check the NGK site. They show the 7 as our stock plug. I have a set of them in my car as we speak. They work just fine.
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2006 CADILLAC STS V 4.4 V8 D FI Supercharged
Spark Plug Part No. Stock No. Plug Gap Photo
Iridium IX TR7IX 3690 .040
Oxygen Sensor Part No. Location Note Photo
Oxygen Sensor 21561 Pre-Cat Left n/a
Oxygen Sensor 21561 Pre-Cat Right n/a
Oxygen Sensor 21566 Post-Cat Left n/a
Oxygen Sensor 21566 Post-Cat Right n/a when I was taking the car to get tuned jessi had asked my what kind of plugs. When i tokd him tr7s he didnt want to do the tune unless i put tr6 i told him i would but never did. Re: spark plugs The stock plugs in my car were not 7s. They were 6s. I put the trix7 in there with no problems.
Oops, didn't mean to sound jerky like that. Re: spark plugs That is what I thought so I called NGK when I was still with StreetSide and they said the stock replacement were 7's...... Maybe they changed their mind?
Go Figure. Re: spark plugs and what are you gapping them to? .40? Re: spark plugs Mine are a little tighter than that from when I had the turbo on it. It was blowing spark out at only 17psi so I put the gaps at 25. I'd change them back to 35 but they are a pain to get out of there just for that.