Changed my plugs after 38k (PICS) - Page 5 - Toyota Yaris Forums

mirageman · 08-25-2019, 07:33 PM

Yay! 48.3 mpg highway, light throttle 60-68mph.... loving these cheap plugs!

BIGTAZ351 · 10-28-2019, 06:35 PM

Well then, I have some "Updating" of my own...It was found incorrect to depend on NGK’s "trivalent coating" and not using anti-seize (my mechanic friends joke as “irrelevant coating”). It has been discovered in the mechanic world that it isn't as good for corrosion/seizure protection as once thought, especially on subsequent (after first factory installation) new plug installations, as can be seen in many of the removed plug photos you will have carbon in the plug and head threads, and that can/will cause seizure of the plug, if you don’t clean it off (not recommended as you dump that crap down on top of the piston and it can damage the cylinder walls) or add a small amount of anti-seize and torque them to the proper “lubed” torque spec. After the steel “coated” but not anti-seized plug has been installed and heated thousands of times in an aluminum head, and that heating/cooling causes the plug to microscopically “walk” in the head due to the dissimilar metal’s expansion rates, creating a carbon grinding action, which breaks down the coating, and allows corrosion of causes seizure. The plug manufacturers don’t want you to use anti-seize because not many people know how to de-rate the torque spec for installing the plugs. However, there are automotive manufactures that DO recommend using anti-seize, regardless of the plug mfr’s recommendations.

Just what I have learned from the Automotive and in the Power-Sports world, in the last 8 years…

I have always used Anti-Seize as taught to at the small engine mechanic shop I grew up in, but it was more a personal preference thing. (I even use it on lug nuts and other long-term attachments, never had a problem, EVER.)

I also change my plugs long before the 100,000 mile recommendation.

bronsin · 11-03-2019, 03:01 PM

The plugs went 150,000 miles in my wife’s Camry. The new ones didn’t make it run any better the old ones work just fine.

The accessory belt and 150,000 miles on it also before I change it. The gauge I got said it was not worn at all. I could nt Bear to throw it out.

BIGTAZ351 · 11-04-2019, 06:20 PM

I have found going longer distances on plugs causes other problems that may or may not be apparent right away... In the old days it would burn rotor and cap due to excessive secondary resistance...NOW it causes coil packs to get hot and burn out, due to excessive secondary resistance...

I always keep the old belt in the back (along with a few tools to do the emergency change) but once they start drying out/squealing/cracking...time to kick it out, I would rather NOT have it crap out along side the road, because I was too cheap/lazy to do preventative maint.

"G" · 11-05-2019, 09:28 PM

I have never had an issue not using anti-seize on plugs. My Yaris has 300k on it. I'm on my 2nd set of Denso Iridium power plugs. Oem plugs I took out at 100k. Installed the first set of Denso's and took them out at 200k. No seizures yet. I've not used anti-seize once since my first spark plug job in 1992. Not one seizure on many of my platforms, 80's rx-7's, 90's rx-7,s, 90's supra, 90's Landcruiser, 90's Toyota pickups, 90's dsm's, 2006 merc amg's, mitsu gvr4's, Cressida, 90's skyline gtr, Lancia Integrale, 2004 Mitsu Evo, the list goes on. You do not need it. It also reduces the sparkplug grounding connection.

10-28-2019, 06:35 PM	#74
BIGTAZ351 144K-Blue / 15K-Ylw View User's Garage Drives: 2010 Ylw 3dr. AT(Blue-Wife's) Join Date: Mar 2011 Location: North Branch, MN Posts: 67	Update on Anti-Seize Well then, I have some "Updating" of my own...It was found incorrect to depend on NGK’s "trivalent coating" and not using anti-seize (my mechanic friends joke as “irrelevant coating”). It has been discovered in the mechanic world that it isn't as good for corrosion/seizure protection as once thought, especially on subsequent (after first factory installation) new plug installations, as can be seen in many of the removed plug photos you will have carbon in the plug and head threads, and that can/will cause seizure of the plug, if you don’t clean it off (not recommended as you dump that crap down on top of the piston and it can damage the cylinder walls) or add a small amount of anti-seize and torque them to the proper “lubed” torque spec. After the steel “coated” but not anti-seized plug has been installed and heated thousands of times in an aluminum head, and that heating/cooling causes the plug to microscopically “walk” in the head due to the dissimilar metal’s expansion rates, creating a carbon grinding action, which breaks down the coating, and allows corrosion of causes seizure. The plug manufacturers don’t want you to use anti-seize because not many people know how to de-rate the torque spec for installing the plugs. However, there are automotive manufactures that DO recommend using anti-seize, regardless of the plug mfr’s recommendations. Just what I have learned from the Automotive and in the Power-Sports world, in the last 8 years… I have always used Anti-Seize as taught to at the small engine mechanic shop I grew up in, but it was more a personal preference thing. (I even use it on lug nuts and other long-term attachments, never had a problem, EVER.) I also change my plugs long before the 100,000 mile recommendation. __________________ All Weather Package, Power Package, Cruise, WeatherTech Floor Mats. Altimax Arctic Winter Tires. Repair List: 1 new blower motor, making funny noise. @ 91K (Water pump @ 120K) Mod List: 1. Black tape on most of the annoying blue high beam light behind the lens. (thank you CTScott)

11-03-2019, 03:01 PM	#75
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,061	The plugs went 150,000 miles in my wife’s Camry. The new ones didn’t make it run any better the old ones work just fine. The accessory belt and 150,000 miles on it also before I change it. The gauge I got said it was not worn at all. I could nt Bear to throw it out. __________________ Synthetic Oil: Its All In Your Head

11-04-2019, 06:20 PM	#76
BIGTAZ351 144K-Blue / 15K-Ylw View User's Garage Drives: 2010 Ylw 3dr. AT(Blue-Wife's) Join Date: Mar 2011 Location: North Branch, MN Posts: 67	I have found going longer distances on plugs causes other problems that may or may not be apparent right away... In the old days it would burn rotor and cap due to excessive secondary resistance...NOW it causes coil packs to get hot and burn out, due to excessive secondary resistance... I always keep the old belt in the back (along with a few tools to do the emergency change) but once they start drying out/squealing/cracking...time to kick it out, I would rather NOT have it crap out along side the road, because I was too cheap/lazy to do preventative maint. __________________ All Weather Package, Power Package, Cruise, WeatherTech Floor Mats. Altimax Arctic Winter Tires. Repair List: 1 new blower motor, making funny noise. @ 91K (Water pump @ 120K) Mod List: 1. Black tape on most of the annoying blue high beam light behind the lens. (thank you CTScott)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pics Pics Pics	Jahbs	Australia	4	06-30-2010 12:06 PM
HELLAFLUSH III pics	contraband831	Photo-Video-Media Gallery	37	01-10-2010 01:11 AM
Oh I am so mad my dealership had the wrong gap on my plugs	joeharth	Fuel Economy Forum	10	03-25-2009 05:26 PM
sparco seats and pedals (pics)	turboyaris	Cosmetic Modifications (Exterior/Interior)	18	09-05-2007 02:43 AM
Extra parts? (Or where do these plugs go)	jah	General Yaris / Vitz Discussion	6	05-01-2006 10:33 PM

08-25-2019, 07:33 PM	#73
mirageman Drives: 2009 yaris Join Date: Feb 2016 Location: poughkeepsie ny Posts: 16	Yay! 48.3 mpg highway, light throttle 60-68mph.... loving these cheap plugs!

11-05-2019, 09:28 PM	#77
"G" Drives: 2007 Yaris Hatch Join Date: Feb 2007 Location: Chicago Posts: 346	I have never had an issue not using anti-seize on plugs. My Yaris has 300k on it. I'm on my 2nd set of Denso Iridium power plugs. Oem plugs I took out at 100k. Installed the first set of Denso's and took them out at 200k. No seizures yet. I've not used anti-seize once since my first spark plug job in 1992. Not one seizure on many of my platforms, 80's rx-7's, 90's rx-7,s, 90's supra, 90's Landcruiser, 90's Toyota pickups, 90's dsm's, 2006 merc amg's, mitsu gvr4's, Cressida, 90's skyline gtr, Lancia Integrale, 2004 Mitsu Evo, the list goes on. You do not need it. It also reduces the sparkplug grounding connection.