Piston hitting spark plug? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

boost addict · 09-20-2013, 04:42 AM

So my motor started missing the other day and after trying to start it back up it make a sound that was like a rod knock. I checked plug number 2 and it was smashed in and crewed. I put a new one in and it did the same thing within seconds. Compression is fine and they are definitely the correct plugs. I feel like its nearly impossible for an sr with stock compression to hit the plug cause the dish in the piston is pretty big and because the done of the head. I feel like it was hit the valves before the plug. Anyone ever had this issue?

09-20-2013, 04:42 AM	#1
boost addict Zilvia Addict Join Date: Nov 2010 Location: Northwest Indiana Age: 32 Posts: 859 Trader Rating: (12) Feedback Score: 12 reviews	Piston hitting spark plug? So my motor started missing the other day and after trying to start it back up it make a sound that was like a rod knock. I checked plug number 2 and it was smashed in and crewed. I put a new one in and it did the same thing within seconds. Compression is fine and they are definitely the correct plugs. I feel like its nearly impossible for an sr with stock compression to hit the plug cause the dish in the piston is pretty big and because the done of the head. I feel like it was hit the valves before the plug. Anyone ever had this issue?