Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I got a 3406E with a 208 thermostat and its been about
I got a 3406E with a 208 thermostat and its been about 80s-90s and temp has been running 205-210 and fan hasnt been kicking on till 212-213 and was wondering if that was normal or bad sending unit or … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
I have a 04 pete 379 couple years ago it started running
I have a 04 pete 379 couple years ago it started running warmer than normal empty or loaded like it wasn't getting any air but I could flip my fan on and it would cool right back down, so I broke down… 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
4,737 satisfied customers
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
Heavy Line Technician
Automotive and Diesel Engines
126 satisfied customers
Peterbilt 2004 379 bxs 10888 cat c15 -problem is engine when
peterbilt 2004 379 bxs 10888 cat c15 -problem is engine when running down road at cruise, engine will cool to about 150 degrees. sit at loading dock and idle will run about 190. pull a hill will come … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
I'm having overheating problems on a ISC 8.3 engine in my
I'm having overheating problems on a ISC 8.3 engine in my 2013 40 foot motorhome. Just had service performed, oil change etc. and had a low coolant alarm and then check engine alarm as I topped a long… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 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
10,225 satisfied customers
DO THEY MAKE A COOLER THERMOSTAT FOR A 3116 CAT, I KNOW OEM
DO THEY MAKE A COOLER THERMOSTAT FOR A 3116 CAT, I KNOW OEM IS AT 190 DEGREES, THIS UNIT SEEMS TO RUN WARM WHEN LOADED. MANUAL GAUGE READS UP TO 220, BUT WHEN CHECK WITH HEAT GUN, THAT IS ONLY READY A… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 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
10,225 satisfied customers
I have a Caterpillar engine seriel # 2wso7860 Was wondering
Good afternoon I have a Caterpillar engine seriel # 2wso7860 Was wondering at what coolant temperature should my fan come on. Thanks. And when the fan does come on how much of a drop should I be seein… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
I have a 6NZ 550 cat. About 6 months ago I had, what I
I have a 6NZ 550 cat. About 6 months ago I had, what I thought at the time, a water thermostat stuck open. I replaced both thermostats and all housing seals. 2 months later it started same thing. I ha… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
Have a c15acert cat engine! It runs HOt does not use water
Have a c15acert cat engine! It runs HOt does not use water doesn't use oil ! Have cleaned all rads,air to air, air conditioners, changed thermostats , water pump , checkout all hoses for blockages, ad… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
I have a c15 cat that wont get over 150 degrees. I replaced
I have a c15 cat that wont get over 150 degrees. I replaced both thermostats and seals, bled air from the system, and still have the same problem. It is a single turbo 6NZ motor. Any ideas?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
I have a 60 series Detroit when temp gauge falls too100 my
I have a 60 series Detroit when temp gauge falls too100 my fan comes on will not go off until it reaches normal temp… read more
John Vieira
John Vieira
Heavy Duty Diesel Mechanic
63 satisfied customers
What should the coolant temp bein a 2004 Pete with a C-15 when
What should the coolant temp bein a 2004 Pete with a C-15 when driving down the road without a load?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 satisfied customers
Ive had 10 and en counting C15 engines overheat, causing the
Ive had 10 and en counting C15 engines overheat, causing the the paint on the engine to discolor! Since they are all brand new trucks, I looked at the engine program and found that the engine coolant … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 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
10,225 satisfied customers
We have a c15 cat assert engine that is running to cold. SDP
We have a c15 cat assert engine that is running to cold. SDP serial number. We cannot get the temperature up. What would be the cause and what should we try to fix this problem?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,225 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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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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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

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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