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Truck Repair/Cummins M11 Injector, Valve, and Jake break adustment


I adjusted the valve, injector, and jake break according to specification but it still isn't working properly. Any advice?

If you could get me your engine serial number. so i can look it up. What do you mean by not working properly? is the top end knocking. If it sounds like the exhaust valve isn't closing all the way i can almost bet that your jake is tightened down to far. Have had problems with guys in my shop the Jake adjustment on 5 and 6 are up against the firewall and hard to get a accurate adjustment on. But give me afew more details and your serial number and can be of more help to you.

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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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