Death Of My 3.4 996 Engine....
09-30-2010, 10:32 PM
#31
Jr.,
When my M97.21 3.4 let go last year the failure likley originated with a rod failure (Dwain's diagnosis). Not sure if the rod bolt stretched slighlty and damaged the bearing or whether the rod failed catastrophically, but either way....boom.
It was likely the former as the car failed in the first minutes of the opening session with no overrev. Car lost power then quit. Like you, I destroyed (possible subconciously) the core at that point becuase I wanted no part of attempting to salvage any part of the engine.
When we built the new engine we used Carrillo rods and machined the crank to improve oiling. No problems so far.
Cheers,
When my M97.21 3.4 let go last year the failure likley originated with a rod failure (Dwain's diagnosis). Not sure if the rod bolt stretched slighlty and damaged the bearing or whether the rod failed catastrophically, but either way....boom.
It was likely the former as the car failed in the first minutes of the opening session with no overrev. Car lost power then quit. Like you, I destroyed (possible subconciously) the core at that point becuase I wanted no part of attempting to salvage any part of the engine.
When we built the new engine we used Carrillo rods and machined the crank to improve oiling. No problems so far.
Cheers,
