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Related Medium and Heavy Trucks Questions
Speedometer not working changed sensor did not help what
speedometer not working changed sensor did not help what sood I do next … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
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Oil pressure has dropped 15 psi in less than 2 days... 01
Oil pressure has dropped 15 psi in less than 2 days... 01 6nz cat … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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How did I get water in oil on a cat 6nz. I have to go look
how did I get water in oil on a cat 6nz JA: What is the complete model and serial number of your machine? Customer: i have to go look it up give me a min JA: Are you fixing this yourself? What have yo… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
02 pete cat c-15 6nz check engine light on flashed 8 now
02 pete cat c-15 6nz check engine light on flashed 8 now wont flash any codes cat et says oil pres sensor voltage high changed sensor twice changed grey wire from sensor to ecm changed ecm did same th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
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I retake my 6nz hp to 550 with a flash file. But now
I retake my 6nz hp to 550 with a flash file. But now personality code is blank and I do not have a cat password … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,114 satisfied customers
Cat Man, I have a 6NZ that I'm having a couple issues with.
Cat Man, I have a 6NZ that I'm having a couple issues with. The first and worst is I had it in for a 10,000 mile service and found antifreeze coming out of # 4 exhaust port. 20,000 miles ago it had a … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,114 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
5,114 satisfied customers
. Just rolled 1.1 million miles on my 475 hp acert in
Hello. Just rolled 1.1 million miles on my 475 hp acert in an 05 pete 379. I bought it at 570k miles from my dads rigging company in CA. It has been a VERY reliable engine for me. I have several ???s … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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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
5,114 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
5,114 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
5,114 satisfied customers
Have an early production C-15 6nz engine that maintains 60
Have an early production C-15 6nz engine that maintains 60 psi oil pressure running down the road at normal highway speeds (55 -60 mph). When throttle is pressed down oil pressure drops to 40-45 almos… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,114 satisfied customers
Is is safe to run the boat with an O ring leak. I did an oil
Is is safe to run the boat with an O ring leak. I did an oil sample. I had a 9% diesel saturation after 40 hrs of running. We changed the oil and I am waiting for cat to fix the issue. In the meantime… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,114 satisfied customers
Hello again Im having another problem with a engine it is
Hello again I'm having another problem with a engine it is a 6nz it will intermittently cut out and sometimes shut off, this morning the driver said it shut off and it took a long time to start back u… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,114 satisfied customers
I want to put a 6nz engine in a 1981 Peterbilt that has an
I want to put a 6nz engine in a 1981 Peterbilt that has an A model cat engine in it Would you happen to know how much difference there is in the mounting brackets… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,114 satisfied customers
Which will get better fuel mileage, a 6nz cat with a 13 speed
Which will get better fuel mileage, a 550 hp 6nz cat with a 13 speed tranny,or a 475 hp c-15 cat with a 18 speed tranny? Thanks… read more
Jim
Jim
Diesel tech.
212 satisfied customers
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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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