Questions tagged [ls1]

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9
votes
1answer
3k views

Do I risk damaging the valve seat if I lap this valve without removing carbon build-up?

This valve is from my LS1 (Exhaust #3). It's suffered from a lot of carbon build-up due to a history of fueling/spark problems. I've tried cooking it in ethylene glycol. I've tried using abrasion ...
6
votes
1answer
6k views

This valve is pitted - what options do I have?

This is that infamous Exhaust Valve #3 after cleanup. The cylinder had a history of fuel/spark-related misfires. As the images show, the lip of the valve is pitted. Here is the back of the valve. I ...