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Truck Repair/oil leak


I have a 1984 ntc 240 855 series engine with excess oil leaking from the tacometer drive housing and excessive black smoking any ideas

Not familiar with those engines but if its similar to the n-14 it has a weep hole in the cover and if that cover gets cracked the oil leaks out that weep hole. What i've done with that is clean it up real good and silicone the hole shut. As for the black smoke sounds like you've possibly have a injector overfueling.

Truck Repair

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Jeff Drumm


I Can answer any question pertaining to semi trucks and trailers. Have no experience in the automotive field so not able to help in that area.


My experiences in Semi Trucks is. I own my own truck and i presntly maintain a 80 truck fleet. Can handle any questions pertaining to a truck have tore apart and rebuilt every aspect on them. Fleet I deal with is Mainly Volvo trucks and a handful of freightliners. Work on automated transmissions on a daily basis along with carrier apu's. With engines my specialty is the 60 series Detroit but do work on the cummins isx the n-14 and the ism. and also the Volvo engines.

Have a College Degree from university of northwestern ohio in diesel and agriculture mechanics. Have 10 years behind the wheel driving a truck and 4 years working on trucks full time. Also have grown up on a farm so have been tinkering on trucks and tractors all my life.

Awards and Honors
I've gone through online schooling and have received certificates from webb wheel, Timken and Volvo academy.

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