Medium and Heavy Trucks

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I have a 379 bilt 6nz cat fan will not kick on automatically
i have a 379 peter bilt 6nz cat fan will not kick on automatically i have changed the sensors and no luck will kick on manual using the switch … read more
NicholasM1019
NicholasM1019
Cummins/Caterpillar
Vocational, Technical or Trade School
688 satisfied customers
I have a freightliner classic year 2000 I had a 3406
hello, I have a freightliner classic year 2000 I had a 3406 2ws25050 engine and I changed it for a 6nz Cat and now the fan cluch does not work (the light on the board indicates that it is on with I pu… read more
NicholasM1019
NicholasM1019
Cummins/Caterpillar
Vocational, Technical or Trade School
688 satisfied customers
I have a 1996 cat 3406e 550hp single turbo engine. I am
I have a 1996 cat 3406e 550hp single turbo engine. I am buying a 2007 kw with a c15 acert engine that has a bad head. Could I use the entire top end of the 3406e on the c15 acert and basically make it… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
FOR THE CAT MAN) I have a c-15 6NZ cat engine transmission
FOR THE CAT MAN) I have a c-15 6NZ cat engine transmission bolts that go into the rear structure broke off all the way around if I pull the rear structure to replace it where the engine mounts are do … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
Replaceing a head on a 6nz and need head torque and vale
replaceing a head on a 6nz and need head torque and vale injector and jake settings … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
2002 C15. 6NZ pushing coolant out of the overflow. Happened
2002 C15. 6NZ pushing coolant out of the overflow. Happened 5 months ago so I pulled head and only thing I found was a small split in head gasket fire ring on #6 cylinder. Replaced gasket and spacer p… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
1988 peterbilt with 4MG cat 3406b engine. All stock factory
1988 peterbilt with 4MG cat 3406b engine. All stock factory rated @ 310 horsepower on engine plate. I know the pump can be turned up, & a lot of things to get more power. I don't want to change the tu… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a c15 mbn bridge motor, what can I do to get better
Hi I have a c15 mbn bridge motor, what can I do to get better fuel mileage … read more
Kent Van Wagner
Kent Van Wagner
40 satisfied customers
2003 Pete 6nz CAT. 26 months/$21,000 spent trying to fix.
2003 Pete 6nz CAT. 26 months/$21,000 spent trying to fix. Erratic power drop / high coolant temps. After 10 hrs driving it starts to run somewhat better with coolant temps controlled to normal … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
Cat Man, NXS loping at idle where to start? No active codes
Cat Man,NXS loping at idle where to start? No active codes altitude adjustment active Atmospheric psi at 13… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
Cat Man, I have a 6NZ that we installed a injector on and it
Cat Man, I have a 6NZ that we installed a injector on and it doesn't have the 4 digit trim code on top of the plunger the other 4 digit number we found is 0453... ET tells me that it has to be 1 to 9 … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
Cat Man, I've seen a lot of Cat liners be pitted and even
Cat Man, I've seen a lot of Cat liners be pitted and even have holes completely through the side. We use baldwins balanced treatment filter on our truck. How often should we check the coolant/ Change … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
Cat Man I have a 6NZ that one of my mechanics snapped off the
Cat Man I have a 6NZ that one of my mechanics snapped off the stud on the injector solenoid. Is it possible to get parts for the injector? also I have a C-12 setting outside that is junk. The solenoid… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 2000 KW with a Cat 6NZ motor and when I get above
I have a 2000 KW with a Cat 6NZ motor and when I get above a 1000rpm it shuts itself down. It restarts fine but still shuts down above a 1000rpm still. Thanks for your help… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
Cat Man. I just did the flash on the KCB engines and since
Cat Man. I just did the flash on the KCB engines and since it only took one file for all four of them do the flash files for each engine prefix work on all engines of that prefix. like all KCB's take … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 2003 Pete with a C-15 that the ecm ESN doesn't
I have a 2003 Pete with a C-15 that the ecm ESN doesn't match the stamp on the engine. How do i go about changing this? ecm ESN- MBN05367 engine ESN-6NZ20374. I would also like to know the max HP/ tor… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 2002 6NZ 550 CAT put new head on it 2 months ago newer oil co
I have a 2002 6NZ 550 CAT put new head on it 2 months ago newer oil cooler and air compressor. I have run it 30000 miles last week it started puffing steam out of dipstick. No antifreeze in oil. I als… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
Hello cat man Im putting this 6nz head back on could you give
Hello cat man I'm putting this 6nz head back on could you give me install procedure and torque specs.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

5,454 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,293 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

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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

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All types of Cummins applications

Curtis B.

Curtis B.

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

Chris (aka-Moose)

Chris (aka-Moose)

Technician

462 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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