icanfixall
Official GMM hand model
I agree with whats posted above. A tach sender is whats in the housing near the oil fill tube. Changing oil is a dirty job. I use rubber gloves to keep the oil thats filled with soot from blowby off my hands. Its a tuff job cleaning your hands when that dirty oil gets on them. I usually will wash many pots, pans and dishes to clean my hands if dirty oil gets on them. I use Chevron delo 15W40 oil. Just be sure to use a diesel engine motor oil. Not the gas engine motor oil.