So like... I have a cross-threaded spark plug - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

EchoOfSilence · 04-04-2006, 01:59 AM

Fucking great.

i take out my #2 to check it, looks fine, i put her back in. I then realize that the plug's at an angle and I've already tightened it. I just stare at it, hoping that just wishing it away will correct my mistake.

I'm not sure if it's always been like that, or if I had just done it now, or whatever. It doesn't matter.

Basically I can either get a new head, helicoil 'save a thread' (for spark plugs), or fuck it and get a dohc (this is on a sohc).

suggestions?

***S14DB*** · 04-04-2006, 04:42 AM

Helicoil or DOHC depending how much money you got to blow.

2tone240 · 04-04-2006, 04:52 AM

check if you can torque it to correct specs. if it can be torqued down, it should hold up just fine. if you can't torque it to spec try the helicoil.

EchoOfSilence · 04-04-2006, 11:09 AM

yeah...
i can't torque it all the way, as the plug may break. since it's at an angle, the whole plug doesn't go all the way in; there's still some thread to go.

however, the engine still fires up and if i disconnect the plug wire it'll bog, which means it's still functioning. AND I just put 340 miles on her yesterday (Spring Break was over so i went to school)

Anyway, I have enough for a dohc, but we'll see what happens. I have to pay for books first and shit like that.

Irukandji · 04-04-2006, 11:16 AM

I know this is a common mistake on the SVT Lightnings since the plugs are so hard to reach, so they make kits where you bore out the sparkplug threads to a bigger size, and put a little "sleeve" over the sparkplug itself and screw everything in. I don't know if they have these "kits" for a lot of cars, but I'm sure it won't be too hard to figure out with parts from the hardware store.

EchoOfSilence · 04-04-2006, 11:20 AM

that's sorta like helicoil, it's just that the one they make specifically for spark plugs doesn't require drilling.

slider2828 · 04-04-2006, 11:52 AM

Go to kragen or napa and then have spark plug rethreader kits made for these reasons. Cause people do it all the time. If it is at an angle, don't torque it any more. Consult the napa peoples, they have a little more knowledge about this stuff.....

04-04-2006, 01:59 AM	#1
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	So like... I have a cross-threaded spark plug Fucking great. i take out my #2 to check it, looks fine, i put her back in. I then realize that the plug's at an angle and I've already tightened it. I just stare at it, hoping that just wishing it away will correct my mistake. I'm not sure if it's always been like that, or if I had just done it now, or whatever. It doesn't matter. Basically I can either get a new head, helicoil 'save a thread' (for spark plugs), or fuck it and get a dohc (this is on a sohc). suggestions? __________________ Petition Nissan to Make the IDx on http://IDxClub.co !

04-04-2006, 11:09 AM	#4
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	yeah... i can't torque it all the way, as the plug may break. since it's at an angle, the whole plug doesn't go all the way in; there's still some thread to go. however, the engine still fires up and if i disconnect the plug wire it'll bog, which means it's still functioning. AND I just put 340 miles on her yesterday (Spring Break was over so i went to school) Anyway, I have enough for a dohc, but we'll see what happens. I have to pay for books first and shit like that. __________________ Petition Nissan to Make the IDx on http://IDxClub.co !

04-04-2006, 11:20 AM	#6
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	that's sorta like helicoil, it's just that the one they make specifically for spark plugs doesn't require drilling. __________________ Petition Nissan to Make the IDx on http://IDxClub.co !

04-04-2006, 04:42 AM	#2
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Helicoil or DOHC depending how much money you got to blow. __________________ Comments should be taken as Opinions not as Statements of Fact

04-04-2006, 04:52 AM	#3
2tone240 Join Date: Jul 2005 Location: hawaii Posts: 17 Trader Rating: (0) Feedback Score: 0 reviews	check if you can torque it to correct specs. if it can be torqued down, it should hold up just fine. if you can't torque it to spec try the helicoil.

04-04-2006, 11:16 AM	#5
Irukandji Post Whore! Join Date: Jul 2004 Location: Compton Posts: 4,268 Trader Rating: (0) Feedback Score: 0 reviews	I know this is a common mistake on the SVT Lightnings since the plugs are so hard to reach, so they make kits where you bore out the sparkplug threads to a bigger size, and put a little "sleeve" over the sparkplug itself and screw everything in. I don't know if they have these "kits" for a lot of cars, but I'm sure it won't be too hard to figure out with parts from the hardware store.

04-04-2006, 11:52 AM	#7
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	Go to kragen or napa and then have spark plug rethreader kits made for these reasons. Cause people do it all the time. If it is at an angle, don't torque it any more. Consult the napa peoples, they have a little more knowledge about this stuff.....