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Truck Repair/Hammering in Motor


I have a 07 Volvo 780 with a 450 cummins ISX Eng #79015969 dated 07/03 with a 12 speed autoshift this hamering is happing at 1350-1550rpm motor has been rebilt front gears have been replaced new aircompressor and nothing has got rid of the noise the shop that done the work told me they have no idea other places said it's a rod I am at the end of my rope with this

Was it hammering before the rebuild or just recently? If were talking recently i would pop the top and check make sure there's nothing broke in the valve train. Had alot of issues breaking valve springs, and wiping out cams on that engine. If it's been doing it since you've had work done to it i would be concerned. Those engines do not like dirt at all. They will lock up and throw a rod for anything. Another thing might check into if it's been doing it since your engine work might find out if they lock tighted the cam gears onto the cam if they didn't the gears might have slipped time.

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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