Medium and Heavy Trucks

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1994 KW Cat 3406E. 80K on inframe. When I did the inframe I
1994 KW Cat 3406E. 80K on inframe. When I did the inframe I replaced cam, head, injectors, and the piston packs and bearings. I also replaced turbo and air compressor at time of inframe. At 10K after … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
418 satisfied customers
Low oil pressure, just changed the oil about 500 miles
Low oil pressure, just changed the oil about 500 miles oil.... oil coming out of the dipstick … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,927 satisfied customers
I have a detroit series 60 that we swapped from a fire
I have a detroit series 60 that we swapped from a fire truck. The truck had a lot of sludge and it has low oil pressure. What do you recommend?… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,927 satisfied customers
I have a detroit 60 14L. I suddenly have a loss of oil
i have a detroit 60 14L. I suddenly have a loss of oil pressure. 19.7psi at idle and 38.6psi at 1600rpm. buzzers go off yet I can let off throttle to get it home. I replaced oil pump, oil pressure rel… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,927 satisfied customers
Vapor type blow by through blow by tube and oil cap when I
vapor type blow by through blow by tube and oil cap when I open it.....I've checked turbo, no problem, checked air compressor, I did have some oil sipping so I went a head and changed it out.... it di… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I HAVE A 2012 FREIGHTLINER WITH A DETROIT 60 EPA07 DDEC VI
I HAVE A 2012 FREIGHTLINER WITH A DETROIT 60 EPA07 DDEC VI WITH A LOTS OF OIL PUSHING OUT OF THE OIL DIPSTICK & VALVE COVER GASKET LOOKS LIKE MAYBE CRANKCASE PRESSURE BUT THERES NOT ALOT OF SMOKE OR O… read more
Roy Belding
Roy Belding
7,528 satisfied customers
I have a CAT 3406E and I have been losing coolant recently.
I have a CAT 3406E and I have been losing coolant recently. I have steam coming through the blow by tube. I cannot see any antifreeze or any leaks anywhere but I do have the steam coming through the b… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
We have a 2250 isx. A valve broke off so we removed the head
Hi. We have a 2250 isx. A valve broke off so we removed the head and got it completely rebuilt. We reinstalled the head everything runs perfectly smooth but when you get 20 psi boost you get a really … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
2006 freightliner century Detroit series 60 12.7 510,000
2006 freightliner century Detroit series 60 12.7 510,000 miles Truck burning oil approx 1-2 gallons a week depending on how far truck is driven. Truck has very excessive blow by from crankcase breathe… read more
Roy Belding
Roy Belding
7,528 satisfied customers
I have detroit 12v92 TA in a sportfish. Fresh in-frame
Hi, I have detroit 12v92 TA in a sportfish. Fresh in-frame rebuild , including heads. 12 hrs in, sucked a valve, took out turbo. What would cause a brand new valve to fail on a new motor that appeared… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
2000 ISM400 turbo #35000163. Suddenly developed enough crankcase
2000 ISM400 turbo #35000163. Suddenly developed enough crankcase pressure to blow dip stick out. Slobber tube is clear and has a lot of air pressure coming out but no smoke or oil. I unhooked turbo ai… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
Buddy just did inframe on detroit 60 engine, everything seems
Buddy just did inframe on detroit 60 engine, everything seems fine ,with horse power .Noticed small to medium amount of blowby(if this makes sense). Noticed oil leaking from flex exhaust pipe just rea… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,927 satisfied customers
Hey Catman. I have a truck engine 3406e 5ek. we have oil blowing
Hey Catman. I have a truck engine 3406e 5ek. we have oil blowing out of the filler tube and the dipstick tube. we removed the breather on the valve cover and it is doing the same thing. Any idea what … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 1993 Cummins L10 engine in a bus. We recently completed
I have a 1993 Cummins L10 engine in a bus. We recently completed an in-frame overhaul with new liners, pistons, rings and bearings. It runs great, but the blow by is pushing oil out of the fill tube. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I have a 03 Pete with an ISX that has very very heavy blowby
I have a 03 Pete with an ISX that has very very heavy blowby it appears like. Is there anything besides blowby that would cause extreme crankcase pressure like this?… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
I have a c12 cat we just rebuilt with a redone head and I have
I have a c12 cat we just rebuilt with a redone head and I have moister in the valve covers and steam out of the blowby tube at 1200 rpm we used interstate McBee overhaul kit… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Hello, we have an inline Detroit Diesel series 671 engine.
Hello, we have an inline Detroit Diesel series 671 engine. We did an inframe overhaul. Reman blower installed also.Problem: at operating temp and full throttle oil is coming out the breather box bolte… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
I replaced the air compressor on my series 60 detroit then
I replaced the air compressor on my series 60 detroit then decided to flush the radiator when refilling the radiator it was taking to much water so I checked the oil level and it is adding water into … read more
Jim
Jim
Diesel tech.
212 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,927 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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