Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
This dusty I have c7 cat that surges really bad when it gets
This dusty I have c7 cat that surges really bad when it gets out of the cold mode. But there is noticeable surging when it is cold when speed it up. I replaced all the injectors they were leaking oil … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,221 satisfied customers
2008 cummins ISX450 in an International Prostar truck.
2008 cummins ISX450 in an International Prostar truck. Coolant temperature gets up to 220 degrees then the fan comes on and it gets back down to 190 then fan goes off but it creeps right back up to 22… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
ISX CM2350 just will like your opinion on this, how logical
ISX CM2350 just will like your opinion on this, how logical or possible is to have coolant leaking into the fuel rail making it all the way to the fuel tanks then making it back to the fuel water sepa… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 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
I have a 2012 Internationañl Pro Star with a Maxxforce 13 In
I have a 2012 Internationañl Pro Star with a Maxxforce 13 In it. The thing surges sometimes especially at idle. I have got codes. SPN 354 FMI 4 which is Relative Humidity Signal out of range. And SPN … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
415 satisfied customers
Coolant coming out of over fill on radiator running hot.
coolant coming out of over fill on radiator running hot … read more
Roy Belding
Roy Belding
7,519 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
10,221 satisfied customers
I have a Cat C13 SN: KCB81769 with 258k miles on it.
I have a Cat C13 SN: KCB81769 with 258k miles on it. Recently it has developed some blow by. It doesn't seem excessive, but it went from zero to some in 2 weeks. The truck does not drip any oil out of… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,221 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
10,221 satisfied customers
C13 cat will blow coolant out of radiator cap coolant tank
C13 cat will blow coolant out of radiator cap coolant tank during first 5 miles of each day... Changed cap but problem still there, blows about a gallon out each day and I refill to sight glass level … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,221 satisfied customers
The engine is a 29 hp Perkins Diesel in a sailboat. We took
The engine is a 29 hp Perkins Diesel in a sailboat. We took it out for a sea trial and at about 3350 it went up to 200 . It held there. At about 2850 it went down to 190 and stayed there at 2500 it wa… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
hello this is aj I talked to you in may and resolved a problem with this same truck. hopef
hello this is aj I talked to you in may and resolved a problem with this same truck. hopefully we can do this again. I was driving it this morning and it blew out a cloud of blackish grey smoke pullin… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
3406C 7nz 1994 cat mechanical has fuel in oil make one and
3406C 7nz 1994 cat mechanical has fuel in oil make one and a half gallons in 200 miles ive had valve covers off no visual leaks had the lift pump off tested it again no leaks I replaced barrels and pl… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have kw 2010 with isx cummins cm871 500 hp 190000 miles my
I have kw 2010 with isx cummins cm871 500 hp 190000 miles my problem is coolant loss but only wen is running one galon on 100 miles but truck parking don't loss water on idle or hig idle leave running… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 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
10,221 satisfied customers
I have 2003 cummins ISX 500 in a volvo I have lost about 10
I have 2003 cummins ISX 500 in a volvo I have lost about 10 psi on the oil and engine heats up in a pull.… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 94 Mack with approx 700,000 miles on an E7 400 engine.
I have a '94 Mack with approx 700,000 miles on an E7 400 engine. I have white smoke coming from the blow by tube--regular exhaust from the stack. No loss of power. Temperature on the coolant is normal… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,221 satisfied customers
I have a truck with a 3406e engine in it. It has some blowby
I have a truck with a 3406e engine in it. It has some blowby and uses about a gallon of oil every two to three thousand miles, we run local on dirt roads and the work it does is hard pulling so I dont… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,221 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,221 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

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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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