Medium and Heavy Trucks

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2002 C15. 6NZ pushing coolant out of the overflow. Happened
2002 C15. 6NZ pushing coolant out of the overflow. Happened 5 months ago so I pulled head and only thing I found was a small split in head gasket fire ring on #6 cylinder. Replaced gasket and spacer p… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
I have a c15 cat 6nz I'm getting back pressure at the
I have a c15 cat 6nz I'm getting back pressure at the coolant reservoir tank … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
I have a C15 in my shop that we did a complete rebuild back
I have a C15 in my shop that we did a complete rebuild back in august. Truck came back in December with a coolant leak. Found that the radiator had failed. Replaced the radiator and when test driving … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
Coolant line to the deverter valve keep on blowing out,when
coolant line to the deverter valve keep on blowing out,when dose the deverter come on @off … read more
Eddy
Eddy
HD Truck Tech
GED
2 satisfied customers
I have 2009 freightliner M2 with ISB engine less than 26000
I have 2009 freightliner M2 with ISB engine less than 26000 lb gross weight. The truck is loosing coolant through the overflow on the coolant tank. I changed the cap with a new cap rated 20 pounds of … read more
roybelding
roybelding
shop foreman
Associate Degree
5,348 satisfied customers
I have a 2009 peterbilt,it is wanting to build pressure in
I have a 2009 peterbilt,it is wanting to build pressure in the overflow tank.I changed the radiator cap,the hose between the radiator and reservoir is not plugged,I bypassed the precooler between the … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
Cat c15 using coolant and pressure in the overflow
cat c15 using coolant and pressure in the overflow tank.Dealer says could be bad injector cups,wants to change them,doesnt appear to have coolant in the fuel??? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
I have A 2006 Kenworth with a C15 Cat engine. I am loosing a
I have A 2006 Kenworth with a C15 Cat engine. I am loosing a lot of coolant appx three gallons on a 8 hour day it seems to slowly get worse. The coolant is coming out of the hose by the rad cap I have… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,400 satisfied customers
MrSpanky, I have a 2005 Volvo in the shop with the D12
Hey MrSpanky, I have a 2005 Volvo in the shop with the D12 motor. It is pushing coolant out the over flo tank. It builds 15 lbs in the main tank, then the pressure cap releases some pressure drops to … read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
Catman I hae a 6nz that we have rebuilt. The block was decked
catman I hae a 6nz that we have rebuilt. The block was decked and we did have trouble with t blowing head gaskets in past, we had a accert crank in it along with those pistons and so on. We changed it… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
Cat Man we have a truck in our shop that has a MXS82507 ESN
Cat Man we have a truck in our shop that has a MXS82507 ESN but its rated at C-16 specs(###) ###-####00 what all would have had to been changed?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
i replace the injector cups on my 1998 international 466e it
i replace the injector cups on my 1998 international 466e it ran great for two day then i check the oil an found water in oil any ideals… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
203 satisfied customers
I have a '07 cummins 400 isx. It builds up 25 lbs. plus pressure
I have a '07 cummins 400 isx. It builds up 25 lbs. plus pressure in the radiator reservoir and it blows antifreeze out. I replaced the air compressor and egr cooler and it still does the same thing. T… read more
Curtis B.
Curtis B.
Retired service manager
Associate Degree
3,493 satisfied customers
hi, my name is ***** ***** NY. I have an '05 C15 ACERT that is
hi, my name is ***** ***** NY. I have an '05 C15 ACERT that is over pressurising the radiator. I put a new air compressor on it thinking it was bad as it was original, that was not the problem. We did… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
catman I have an 08 cat c15 eng sn sdp04125. It is building
catman I have an 08 cat c15 eng sn sdp04125. It is building pressure in the coolant. We thought it had a leak but I just looked at it and it appears to be flowing from the cap. the engine was cool lik… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
Hi Ive got a cat c15 6nz 28000 hrs , been great , just started
Hi I've got a cat c15 6nz 28000 hrs , been great , just started to be slower to start and a bit of pressure through to rad causing the rad to over flow , the coolant is agitated with air or combustion… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,632 satisfied customers
Have a c15 6nz rebuilt 1 month ago because putting antifreeze
Have a c15 6nz rebuilt 1 month ago because putting antifreeze in base around bottom of #2 liner because o rings bad. Liner protusion good and block deck good, first rebuild. After 3 weeks starting put… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
Hi i got 03 peterbilt with cat c15 6nz serial number had oil
Hi i got 03 peterbilt with cat c15 6nz serial number had oil in coolant changed water pump and thermostat by than we saw oil cooler is dirty so i changed that to after 2 weeks i see again little oil i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,044 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

3,632 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

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10,044 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

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

Jeremy

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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cumminsdr

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Chris (aka-Moose)

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16 years of experience

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dieseldan55

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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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