Hypothetical: cross-threaded spark plugs - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Lurkable · 02-08-2008, 11:50 AM

How serious a problem could this be? I've recently been having an oil-leak into my spark plug tubes. Only a little in 2,3,4, but a serious amount in #1. And the other day, the connector for the spark plug wire in #1 popped off, presumably due to nasty oil build up making everything slick and greasy in there. So what, big deal right? Clean out the oil, get a new gasket...

But I noticed when I try to screw or unscrew that one spark plug, it feels like it is cross-threaded, whereas the other 3 screw out just fine. If #1 is cross-threaded, am I totally screwed? Maybe the oil was leaking down the threads of the spark plug? I don't know, I've never dealt with this kind of problem before. Any insight is appreciated.

Oh yeah, it's a stock '95 KA.

02-08-2008, 11:50 AM	#1
Lurkable Zilvia Member Join Date: May 2004 Location: SF Bay Area Age: 39 Posts: 171 Trader Rating: (0) Feedback Score: 0 reviews	Hypothetical: cross-threaded spark plugs How serious a problem could this be? I've recently been having an oil-leak into my spark plug tubes. Only a little in 2,3,4, but a serious amount in #1. And the other day, the connector for the spark plug wire in #1 popped off, presumably due to nasty oil build up making everything slick and greasy in there. So what, big deal right? Clean out the oil, get a new gasket... But I noticed when I try to screw or unscrew that one spark plug, it feels like it is cross-threaded, whereas the other 3 screw out just fine. If #1 is cross-threaded, am I totally screwed? Maybe the oil was leaking down the threads of the spark plug? I don't know, I've never dealt with this kind of problem before. Any insight is appreciated. Oh yeah, it's a stock '95 KA. __________________ Rim: n. The circular outer part of a wheel, furthest from the axle. Rim: n. A circular metal structure around which a wheel tire is fitted. Wheel: n. A solid disk or a rigid circular ring connected by spokes to a hub, designed to turn around an axle passed through the center.