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Old 21-05-2016, 08:23   #1
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Yanmar 4jh5e Diesel Pump

My Yanmar 4jh5e vibrates too much. When I lose the fuel line to piston #3, the vibration reduces. The engine pistons holds its pressure steady. I swap the injectors but the problem stayed. Recommendations?
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Old 21-05-2016, 15:11   #2
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Re: Yanmar 4jh5e Diesel Pump

does the vibration reduce in high rpm?
check your no3 injector maybe is stuck and opens on low pressure causing preignition

M.E
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Old 21-05-2016, 15:13   #3
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Re: Yanmar 4jh5e Diesel Pump

sorry missed the ''swap injectors'' check on the high pressure fuel pump the delivery valve for the no3 injector

M.E
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