Medium and Heavy Trucks

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I have a 2007 isx Cummins and i am wondering if my water
I have a 2007 isx Cummins and i am wondering if my water pump is bad. Went to pull a load of corn to the elevator and got 3 miles down the road and the water temp and the oil temp both spiked and the … read more
NicholasM1019
NicholasM1019
Diesel Technician
GED
2 satisfied customers
Cummins x15 runs hot loaded never gets below 200 unless on
Cummins x15 runs hot loaded never gets below 200 unless on down hill grade … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
I have a 2012 Freightliner Cascadia DD13 Engine with
I have a 2012 Freightliner Cascadia DD13 Engine with overheating problems. I replaced thermostat, air filter is clean, radiator is clean. When temperature reaches 210 degrees and fan clutch kicks in i… read more
Roy Belding
Roy Belding
7,530 satisfied customers
Thermostat. C15 caterpillar 6nz. Myself. I'll ask him once
Thermostat JA: What is the complete model and serial number of your machine? Customer: C15 caterpillar 6nz JA: Sometimes things that you think will be really complicated end up being easy to fix. The … read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 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
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Cummins isx9.. replaced t stat and pressure tested system.
Cummins isx9.. replaced t stat and pressure tested system. issue.. temp goes from 180 climbs to 210 floats there for a min fan kicks on, temp drops to 180, the cycle repeats every 47-49 sec..sensor re… read more
Jackie Dempsey
Jackie Dempsey
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Automotive and Diesel Engines
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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
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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
5,234 satisfied customers
Have a 2017 International Prostar VIN 3HCDJAPR7JL528506 with
have a 2017 International Prostar VIN 3HCDJAPR7JL528506 with an ISX15 Cummins in it.... driver is telling me this winter it normally ran around 210-215 degrees,, on warm days it jumps to 230 then drop… read more
Wayne
Wayne
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Vocational, Technical or Trade Scho
4,023 satisfied customers
Alex. I got the fan gear drive changed out on my 2011 pro
Hey Alex. I got the fan gear drive changed out on my 2011 pro star with Maxxforce13 The trouble is the fan is only engaging about 215 and barely keeps the truck from Overheating. I'm rushed with a tra… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Catman eng sn SDP04125 it seems to be running hot. the
catman eng sn SDP04125 it seems to be running hot. the radiator is fairly new. Friday truck was running normal today bobtail it went straight to 200 F. Then loaded it was between 200 and 210. Driver t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Hey Cat Man. I have a 2003 pete with a c15 6nz in it. It runs
Hey Cat Man. I have a 2003 pete with a c15 6nz in it. It runs great with no water or oil loss since an out of frame 115,000 miles ago. Since the rebuild it's ran hot. I've replaced the radiator and th… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
5,234 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
1) I have a 2008 c15 acert with bully dog gt under normal
1) I have a 2008 c15 acert with bully dog gt under normal driving the engine temp runs at 135 pulling hills it will run to 210 and the fan will then kick on (started after engine was rebuilt) 2) also … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 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
5,234 satisfied customers
1999 Caterpillar c12 in a peterbilt 385. Water pump has been
1999 Caterpillar c12 in a peterbilt 385. Water pump has been replaced, exterior of the radiator has been washed. The engine fan comes on at all temperatures. While driving the temp will be around 210 … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
i have an 05 international 4400. Loaded or unloaded it always
i have an 05 international 4400. Loaded or unloaded it always ran no more than 180 to 190 degrees. Recently it has been between 210 and 230. I changed the thermostat but no change. my mechanic is tell… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a Pete 387 cat 435 c15 with 608000 miles my oil temp
I have a Pete 387 cat 435 c15 with 608000 miles my oil temp gauge is running 210/220 with fan running my hoses running across valve cover is melting what is causing this to happen… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

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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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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

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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)

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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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