s14 ka24de #4 spark plug smashed, any ideas? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

xptnike · 03-07-2013, 12:31 PM

Okay, well...did a little more of a seach, not specifically for the ka24 but a general search. Found some more info about the problem. The possibilities are the rod bearing is out of spec enough to the point where the piston pushed up far enough to smack the plug. There could have been something that was sucked into the combustion chamber that allowed for the plug to get smashed. The other possibility is that due to bad timing or detonation, my piston ringland cracked and it was shooting around in the cylinder, eventually causing the spark plug to get smashed.

Going to be taking my head off soon to verify any further problems. Not sure what to expect yet and don't have much time to work on the car. I'll update once I get the head off.

Anyone else have ideas? knowledge?

03-07-2013, 12:31 PM	#3
xptnike Leaky Injector Join Date: Aug 2008 Location: sac norcal Age: 35 Posts: 147 Trader Rating: (11) Feedback Score: 11 reviews	Okay, well...did a little more of a seach, not specifically for the ka24 but a general search. Found some more info about the problem. The possibilities are the rod bearing is out of spec enough to the point where the piston pushed up far enough to smack the plug. There could have been something that was sucked into the combustion chamber that allowed for the plug to get smashed. The other possibility is that due to bad timing or detonation, my piston ringland cracked and it was shooting around in the cylinder, eventually causing the spark plug to get smashed. Going to be taking my head off soon to verify any further problems. Not sure what to expect yet and don't have much time to work on the car. I'll update once I get the head off. Anyone else have ideas? knowledge?