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Truck Repair/excessive oil blowby


Hello my friend thanks ahead of time for your work.. I own a 99 frht classic with the N14 select motor, red top I believe you would call it. 525 hp..We have around 640k on it now and it has been blowing oil around quite a bit. But after the turbo froze up and was replaced we are finding more blowby. We made a make shift catch can and notice it filling up faster now, and my son said he is having to add more oil than usual maby a gallon in 18 days he said. That may not be perfectly accurate. I saw in a previous post that the heads could need work, but it sounds like rings.. What do you think. We will do an oil sample right away also to see if there is anything obvious truck seems like it makes great power. Thanks, Art

A gallon in 18 days isn't too bad. Defininetly would do oil samples to check for wearable metals. Might take you 3 or 4 times sampling to get a idea whats normal for your truck and whats abnormal.  I would say your right on the rings. If you had a blown head gasket or something you would know she wouldn't run right. If you decide to tackle the project of the rings i would do a whole in frame liners and all. You could reuse your heads but in my experience reman heads are pretty cheap for the n-14 and most problems with that engine is it likes to drop valves. Roll your mains while your down there too.

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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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