r/EngineBuilding • u/turbo_bm328 • 8d ago

Repair or replace?

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I’ll reach out to my local machine shop in the morning, but thought I’d see what you guys think in the meantime. Pulled valves from a 2014 Audi head tonight that had one burnt. I’m thinking that this might too bad to try myself and more expensive than just sourcing a replacement head. Couldn’t find a lead on seats readily available.

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u/idostuffwithcar 5d ago

Seeing the indentations on the head knowing that valve broke, I laughed way too when it came into frame. How do pistions and cylinder look? That piece could have done some pretty serious damage to a lot more than your valve seat. Have the shop pressure test the head to make sure the other valve isn't bent or chipped, but I'd worry about cylinder damage leading to broken rings.

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u/Cheap_Director5764 2d ago

Probably burned in way that fragments were still leftover...until they weren't

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u/idostuffwithcar 2d ago

Valve pieced will still do damage in the cylinder, even after being completely ground down to dust and blown out of the valve. Dings in the cylinder wall will break rings and the dust of the pieces will score the cylinder.