(1) Is the air filter damp or attached with soil? Are there any water marks on the air filter housing and the intake pipe wall?

(2) Check the Bare Engine oil to determine whether the Mitsubishi Engine cylinder has water in it. After water enters the Bare Engine, the oil around the Bare Engine cylinder head and the intake and exhaust valve seats will be milky white, which is the result of the mixture of water and oil.

(3) Whether the Bare Engine has water in it can be confirmed by checking the piston and connecting rod. If water enters the Bare Engine cylinder and causes the Mitsubishi Engine to break, the top of the broken connecting rod piston will be very bright (the top of the piston is relatively unbroken). And the broken connecting rod is bent.

In addition, we can also judge by observing the high problem (top dead center) of the piston ring movement on each cylinder sleeve.

It can be found that the top dead center of the cylinder corresponding to the broken connecting rod is significantly lower than that of other cylinders, which can also help us determine that the connecting rod was bent before it broke.