This is almost always due to over-tightening the plug... metal stretches enough to loosen crimping-force on insulator. It can happen with any plug, however Denso is the most sensitive due their softer high-nickel alloy.

Same happened to me with IK20 model, 2 from 4 were loose and other 2 were burned from compression leaking...

These are fake, I can tell by the denso logo is too heavy a print

@dvmartel1

6 жыл бұрын

I didn't get these off a Chinese supply/eBay. They are real. Not sure what you mean about "logo too heavy", it is exactly like the "real" on shown in this fake Denso plug vid. kzread.info/dash/bejne/k2SVs9Kdo6SygbA.html

Yep they're fake.

@dvmartel1

6 жыл бұрын

I would be happy to mail it to you for your inspection (I still have one or two sitting around). Sure they are worn a bit, they had the shit run out of them at 9350 rpm in a race motor. They are not fake, they were sourced locally by my engine builder who I've known for 17 years. I don't put eBay Chinese spark plugs into my friggin race car. I've seen the Chinese Denso fake on youtube. These are original Denso plugs.

@marczamo2500

6 жыл бұрын

D Martel Na I believe you, if you're that adamant about it. I wouldn't give u my address. Impressive motor you got. Shit happens but Denso makes good stuff. Pretty much one of the top OEM suppliers in the world.

@dvmartel1

6 жыл бұрын

All good, lol, I was thinking that about the address. Yeah, stuff happens. Enjoyed the heck out of the car and high RPM b16. Comes at a cost, it breaks stuff. I did keep the plugs cause I bothered me what happened. Watching this video and comparing the plugs, mine have the good quality/color fonts. kzread.info/dash/bejne/k2SVs9Kdo6SygbA.html

@marczamo2500

6 жыл бұрын

D Martel B16 is a great motor, yea thats racing. The knockoffs were notorious for that same defect but doesnt mean Denso didnt have similar issues.