Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a C15 cat 05 peterbilt I've lost 5 to 8 lb of oil
I have a C15 cat 05 peterbilt I've lost 5 to 8 lb of oil pressure and can't find it put a new oil sending unit and tried to put a manual gauge to see if it was right can't find the right pass used to … read more
NicholasM1019
NicholasM1019
Cummins/Caterpillar
Vocational, Technical or Trade School
594 satisfied customers
Truck running too cool. C15 6nz had thermostat replaced.
Truck running too cool. C15 6nz had thermostat replaced. After warmup, takes 20 miles to get temp to 190. Temp drops 15 degrees going thru a small town, then it will pick back up in few miles. At 800 … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
Truck is over heating only on the uphill climb radiator and
Truck is over heating only on the uphill climb radiator and thermostat are not the issue they were replaced over a year ago with no change with issue. Good compression no oil or coolant loss at all … read more
Edward Haniewski
Edward Haniewski
General Studies/Automotive
1 satisfied customers
2004 cat acert c15 Diesel engine over heats only when boost
2004 cat acert c15 Diesel engine over heats only when boost pressure reaches over 30 psi with light loads and 17 psi with heavy loads. No coolant loss or oil. Compression is good on all cylinders. Wil… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 99 Peterbilt 379 with a CAT C 12 engine that's over
I have a 99 Peterbilt 379 with a CAT C 12 engine that's over heating. I have replaced EVERYTHING and it continues to over heat only while loaded and going up a hill. Also only during the summer when t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a bxs c-15 acert twin turbo that all the sudden m/t
i have a bxs c-15 acert twin turbo that all the sudden m/t started to overheat up tp 230 degrees stop making cab heat . the engine hs 560000 original miles on it , i replaced the thermostats and housi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
My 98 3406e cat is running cold (120-150) at all times. I
My 98 3406e cat is running cold (120-150) at all times. I have put all new thermostats and seals in it as well as all new antifreeze. We checked temp gauge with thermometer.. I read about a fitting po… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 2006 c-15 cat engine that was parked for about an
I have a 2006 c-15 cat engine that was parked for about an year because of fuel in coolant. Replaced injector cups along with orings and fuel injector orings. No more fuel in coolant Road tested and f… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 2006 peterbilt oil pressure goes from 42# to 80# to
i have a 2006 peterbilt oil pressure goes from 42# ***** 80# ***** 03 while running it is a C-13 acert cat engine do you think it is a sensor and where is it located … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
D9h dozer is running hot. Torque guage is cool but motor
D9h dozer is running hot. Torque guage is cool but motor heats to the red and water relieves from relief on top of radiator. We removed thermostats but didn't help. Is relief valve bad? What pressure … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
I have a message on my ecm on a cat c 15, message says
I have a message on my ecm on a cat c 15, message says altitude adj active. What does this meen? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have a 2003 Kenworth Tractor with a Cat C-15, single turbo
I have a 2003 Kenworth Tractor with a Cat C-15, single turbo 475 horsepower. 1.9 million miles on it. VIN 1XKADB9XX3J705296 Over the last 12 months the truck has gotten very sensitive about it's fuel … read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
Good afternoon Cat man, I have an 08 KW with a C-15 ESN
Good afternoon Cat man, I have an 08 KW with a C-15 ESN SDP11060. It originally came in with a concern of overheat, customer requests new thermostats and coolant. Upon draining the coolant I found the… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
have a 2001 Peterbilt 387 10 speed cat C-12, when we go through
have a 2001 Peterbilt 387 10 speed cat C-12, when we go through a really hard rain all our tach ,speedometer,oil pressure,water temp, turbo boost. oil temps all freeze and stop working.Sometimes they … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
We talked about this same engine earlier and you gave me the
We talked about this same engine earlier and you gave me the following advice...I assumed you had a C7. The C7 has much more problems than the earlier 3126. The Heui pumps on C7 engines are known to f… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
hello I have a 4900 dt466e 1998 with coolant problems, this
hello I have a 4900 dt466e 1998 with coolant problems, this all started when I had a bad turbo, it was pitted and play in the bearings, so I replaced the turbo and oil cooler, after this was done ect … read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have an 08 kenworth t 2000 with a c 15 cat. 13 speed, my
I have an 08 kenworth t 2000 with a c 15 cat. 13 speed, my m8les are 757, 800 and yesterday my trucks oil pressure gage wiuld drop then go back to normal then drop to abiut 10 then I wouldnt have any … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
I have C-15 550 TWIN TURBO CAT, WITH 470,000 MILES ON IT.last
I have C-15 550 TWIN TURBO CAT, WITH 470,000 MILES ON IT.last year my oil was mixing in my radiator. i had it in the shop and the oil cooler was replaced, radiator flushed etc. one year later the prob… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,293 satisfied customers
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Daniel Wilson

Daniel Wilson

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Cat Man

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I am ASE Master Truck Certified.

Wayne

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

Jeremy

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Curtis B.

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

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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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