Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
I have a C9 in an RV with a hydraulic cooling fan. over the
I have a C9 in an RV with a hydraulic cooling fan. over the last two trips the fan has stopped so i would immediatley pull over and shut down. After a few minutes i start up and the fan operates for the rest of the trip. when operating it cools great. Thanks … read more
Scott Anthony
Scott Anthony
Master Technician
HS Diploma
2 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
10,213 satisfied customers
Can you put acert water pump on single turbo c15. Cat
2001 Pete 379. Wondering if acert high volume pump would better cool my non acert cat… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
I have an O7 Freightliner where is a C15 acert twin turbo at
I have an O7 Freightliner where is a C15 acert twin turbo at 475 horse I've driven it over 300,000 miles recently I had an overheating issue and it cos they had to crack and I had it in the shop and I… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
I have a 2003 379 c15 6nz. My oil tempos at 220 with a new
I have a 2003 379 c15 6nz. My oil tempos at 220 with a new teltek gauge and sensor. My water temp shows around 220-225 when working the motor is working hard. I thought it sounds high. Have new thermo… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
I have a 5.9 280 hp cummings with allison trans in my 1999
I have a 5.9 280 hp cummings with allison trans in my 1999 winibago 34 foot with a colorado toad and 60000 miles this week going to washington I had problem with overheating up hill rig left on cruise… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
2004 Peterbilt w/C15 Acert (BXS) Okay i finally got fan
2004 Peterbilt w/C15 Acert (BXS) Okay i finally got fan situation figured out and it now cycles on @ 217 and off @206 like it should. BUT now when it gets hot (230 i believe) the buzzer comes on and "… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
I need to clean a radiator on à 2011 kenworth semi-truck
I need to clean a radiator on à 2011 kenworth semi-truck with a1800 450 Cummins engine. I would like to use a garden hose and the engine fan. Please advise.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Freightliner fl 112 is overheating changed thermostat changed
Freightliner fl 112 is overheating changed thermostat changed coolant fan seems to be blowing fast from moment I turn truck on but doesn't seem to be cooling engine down… read more
Expert
Expert
7,452 satisfied customers
I have a 2005 Winnebago pusher with a Cat C7 engine that has
I have a 2005 Winnebago pusher with a Cat C7 engine that has recently started to over heat. Can anyone answer a few simple questions?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
Hello sir. I have a C-12 in my western star. The temp stays
Hello sir. I have a C-12 in my western star. The temp stays at 195 like it should then it will shoot up to 220-230 and turn on the warning lights. If I shut the truck off and restart it it's ok. It on… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
Answers from Two Experts requested: 2008 Fleetwood Discovery motorhome
2008 Fleetwood Discovery motorhome with Cummins 6.3ISL; has about 20k miles now. Have pulled a 6T trailer for years without any trouble relative to coolant temp, all of a sudden any hill I have to cli… read more
Geoff
Geoff
BS
12 satisfied customers
Answers from Two Experts requested: 2008 Fleetwood Discovery motorhome with Cummins 6.3ISL
2008 Fleetwood Discovery motorhome with Cummins 6.3ISL; has about 20k miles now. Have pulled a 6T trailer for years without any trouble relative to coolant temp, all of a sudden any hill I have to cli… read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,636 satisfied customers
I have a Cat 3406B. Less than 100K on out of chassis. Was set
I have a Cat 3406B. Less than 100K on out of chassis. Was set up at Cat for factory +10%. New water pump, thermo and radiator is 4 years old w/ no fin problem. Pyrometer runs up pretty quick under lit… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
Caterpillar 3406B: Already been here once today...Ill rephrase
Already been here once today...I'll rephrase the original way I explained the problem..to recap, I have a 3406B caterpillar w/ less than 100k out of chassis overhaul. Slightest grade deadhead or empty… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
C12 Cat 505HP overheats as soon as I begin any grade at all.
C12 Cat 505HP overheats as soon as I begin any grade at all. I replaced the radiator, thinking that was the issue, it was bad anyway w/ 80K miles on it. It continues to overheat. It's not a truck. It … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,213 satisfied customers
2005 fm1j overheating on pulling up hills I have changed radiator
2005 fm1j overheating on pulling up hills I have changed radiator fan hub thermostat coolant and just rebuilt fuel injectors but still getting hot motor has done 15000 hrs but still goes well… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
06 4300 dt 466 , new surge cap, water pump, radiator, fan clutch,
06 4300 dt 466 , new surge cap, water pump, radiator, fan clutch, thermostat, hoses, belt, and still runs hot at 65 empty. Turn of AC and it drops to 200. 220 or 230 at. 65 empty. Run 55 with AC and i… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,213 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

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x