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Silber · 09-16-2021, 12:03 PM

The exhaust valve that is missing, the shaft is perfectly straight. I’m guessing the head fell off that one from heat, or possibly simple mechanical failure due to structural issues in the metal? The intake valves that are damaged, the valve shafts are bent, making me think this might be collateral damage from the exhaust valve?

I will get the head off this weekend and post more pictures of the carnage.

My main concern is ruling out anything that moves from old engine to new engine as the cause of the failure. Whether in the end it was the injector, the intake or a mechanical problem with the piston or head is not as important to me as keeping the new engine safe from a repeat performance.

Silber

09-16-2021, 12:03 PM	#24
Silber Registered User Join Date: Aug 2016 Posts: 166	The exhaust valve that is missing, the shaft is perfectly straight. I’m guessing the head fell off that one from heat, or possibly simple mechanical failure due to structural issues in the metal? The intake valves that are damaged, the valve shafts are bent, making me think this might be collateral damage from the exhaust valve? I will get the head off this weekend and post more pictures of the carnage. My main concern is ruling out anything that moves from old engine to new engine as the cause of the failure. Whether in the end it was the injector, the intake or a mechanical problem with the piston or head is not as important to me as keeping the new engine safe from a repeat performance. Silber __________________ 2002 Boxster S - Silver/Boxster Red Coilovers - LSD - CAI - High Flow exh. - F&R Adjustable Sways LN 3.2 to 3.8 - parts acquired, pending assembly and tuning Last edited by Silber; 09-16-2021 at 12:07 PM.