Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
Looking into buying an old cummins 855 big can 3 with an
looking into buying an old cummins 855 big can 3 with an automatic. it has 2,000 hours on the clock. its going for a reasonable price. the main concern is when the truck is idling, white smoke comes o… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
We have a 2005 international 4900 series with a Cummins ISX
We have a 2005 international 4900 series with a Cummins ISX engine. The engine smokes extreme and there is pressure in the return fuel system. Injectors 4, 5, and 6 are clearly showing signs of damage… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Trying to find torque setting for small cam 855 cummins
trying to find torque setting for small cam 855 cummins injectors … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
15 year old Cummings 6 cyl starts and runs good to1500 rpm.
15 year old Cummings 6 cyl starts and runs good to1500 rpm. Then black smoke and will not go higher. Cleaned intercooler, no change. Bypassed intercooler, no change. Turbo pressure is 3. No back press… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
I have an 82 kenworth w900b with the Cummins ntc 350 big cam
I have an 82 kenworth w900b with the Cummins ntc 350 big cam 3 engine. At idle when starting it cold, it puffs a lot of white smoke. That will die down as it warms up. Then when you step on the accele… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
35,291 satisfied customers
1979 Cummins 855 Head Bolt Torque, 10791866 engine number,
1979 Cummins 855 Head Bolt Torque JA: What is the complete model and serial number of your machine? Customer: 10791866 engine number JA: Are you fixing this yourself? What have you tried so far? Custo… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
How well do you know the ntc 400 big cam motor the early
How well do you know the ntc 400 big cam motor the early series that looks very similar to the 855 motor … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 1978 cummins big cam (I) 400 and need to adjust the
I have a 1978 cummins big cam (I) 400 and need to adjust the rack. What are the values for the valves and injectors and do I need to know the CPL? How can I find out the CPL if the tag has gone missin… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
I have 1990 365hp nt 855 stc engine just rebuilt engine
i have 1990 365hp nt 855 stc engine just rebuilt engine customer drove for 3 days ran great 4th day started smokeing and running low on power smoke is excessive fuel exhaust is all sooty has had new i… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Owner pulled out 855 in @late 60's truck.He said old motor
Owner pulled out 855 in @late 60's white truck.He said old motor Front had slight tilt. Also I saw front motor mount bolted to front of engine it is at a angle. Farmer was trying to put in a 290 and i… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have an 2004.5 cummins HO with 170000 miles. after
I have an 2004.5 cummins HO with 170000 miles. after installing 60hp injectors It started using 3 gallons of oil everyday Still runs fine, not smoking (just a little in the mornings at startup) and no… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
I have a cummins n14 plus 1995 mod rated at 400 hp. In a john Deere 8970 tractor It
Hi ,I have a cummins n14 plus 1995 mod rated at 400 hp. In a john Deere 8970 tractor It has clocked up 12800 hrs The fuelinjector pump was serviced at around 8000 hrs , I'm not sure about the injector… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 2008 Peterbilt with a SDP C15. My motor has recently
I have a 2008 Peterbilt with a SDP C15. My motor has recently start locking up when starting hot and then when it does start I get a puff of white/blue smoke that smells like diesel, it runs a little … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Hi, I have a cummins 855 big cam , mornings she starts fine
Hi, I have a cummins 855 big cam , mornings she starts fine but smokes but once hot it goes away , however once hot and if I let her idle for 3 minutes she starts smoking white and fumes burn my eyes.… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
We have a cummins n14 in a Freightliner. The original problem
We have a cummins n14 in a Freightliner. The original problem was it was missing and popping through the exhaust. We have ran the over head and set the valves. In the cummins computer there are no cod… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
i have a L10 CUMMINS 320HP ENG and the diesel is going into
i have a L10 CUMMINS 320HP ENG and the diesel is going into the oil and it is blowing black smoke when rev could you please advice what may be happening?… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
im going thru a gallon of oil every 3 days. 2005 frieghtliner
im going thru a gallon of oil every 3 days. 2005 frieghtliner m2 106 cat c7 507,000 miles. rings?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
we have a strong diesel fuel smell inside our school bus from
we have a strong diesel fuel smell inside our school bus from a C7 engine. no fuel leaks. the antifreeze and oil were analyzed and came back good . I replaced all the O rings on the injectors but ther… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 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

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

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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