Mercruiser 3L push rod bent, rocker arm off center, clanking noise from engine
2007 Maxum 1800 MX, Mercruiser Alpha 1 Gen 2 engine. Smooth sailing until I've heard a very loud clanking noise. Towed the boat back, took the rocker cover off and found out that cylinder #3 rocker arms were off to the side sitting on cap rotators instead of valves (exhaust more than intake).
Took nuts off both rockers and found out that both push rods were bent. One rocker arm stud had a deep cut (exhaust side) and even the head had a notch grinded by the push rod! (see pictures).
Got the new parts (rods, rocker arms, stud) but I'm not sure about 2 things:
1) what could possibly cause those push rods to be bent?
2) how to replace the rocker arm stud
Could a faulty hydraulic valve lifter cause that? Perhaps the valves weren't adjusted properly? Has this happened to you? Any ideas?
I just bought this boat few months ago. The previous owner had the cracked head replaced a year ago.
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