Dropped intake seat, Made a mess. Options

[TrailerParkBoy]

Intake seat let go. Ended up resting at angle to valve (odd location, usually they sit flat if loose?) which ended up taking a chunk from top of piston and scuffing cam lobe from pressure created. Much work ahead of us this weekend :-(

[TrailerParkBoy]

Pulled it apart and this is what we found, remember this is an original 2.0 head on 96mm pistons In a motor I’ve been running a long time.
- no lean condition. The pistons in 1/2/3 look slightly rich, plugs the right colour, no signs of stress on piston tops, valves, rings.
- lifter rod was smashed on end, enough material removed to shorten rod by half inch.
- we assume the seat worked loose and then bounced around for many miles (perhaps I should have been listening!) before finally resting on angle and smashing piston top
- we assume material from seat and piston caused the piston top pitting prior to landing on angle, this explains the metal condition.
- no metal in crankcase
- number four liter and cam lobe “scuffed” due to piston contact. We will replace all internals
New Build:
- we have 039 heads from Jonathan at AA (would love to have them… but don’t have the budget for Ken’s $5k heads). 78mm crank counterweighted, 96 pistons, stock rods, everything balanced including flywheel and alternator.

Thank you everyone for questions, comment, opinion and advice on all of the above.

Cheers,