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We have a 2008 peterbilt with a C15 in it. Customer brought
Hi we have a 2008 peterbilt with a C15 in it. Customer brought it in because diesel is getting into the oil. We did some troubleshooting even put dye in the fuel system. It seemed like all vdaup … read more
BrentR718
BrentR718
6 satisfied customers
2014 pete isx15 cm2350 got two issues but may be related,
2014 pete isx15 cm2350 got two issues but may be related, one is the coolant is building a lot of pressure sometimes coolant comes out from relief cap and when open main cap coolant wants to rush out,… read more
cumminsdr
cumminsdr
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High School or GED
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I have a fl-80 with a 3126 cat. The fuel appears to be
Just started researching the problem. Have been told it is probably an injector sleeve?? engine runs and starts fine and does not run hot … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
414 satisfied customers
Have a Navistar dt466 engine that will start and idle but
Have a Navistar dt466 engine that will start and idle but when you rev it, it stumbles and dies … read more
Mike Mcmillan
Mike Mcmillan
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2000 FL80 150000K 3126 CAT I suspect the injector cup orings
2000 FL80 150000K 3126 CAT I suspect the injector cup orings have failed. Coolant is contaminated with fuel and bleeding out the overflow. What other issues need to be looked at, such as flushing the … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
414 satisfied customers
Fresh rebuild complete, pistons, liners, head injectors
Ok... fresh rebuild complete, pistons, liners, head injectors ect... runs great, no miss, doesnt over heat, 190 degrees. Bob tailing no issues. Pulling 60 lbs steel coil no problems, 100 lbs load it p… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have a c15 cat thee was fuel in my coolant so i had all
I have a c15 cat thee was fuel in my coolant so i had all the injector cups replaced and after about 2000 miles i have lost about 4 gallo a of coolant with no visible leak seems like it may be going i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
Got a 06 c15 twin turbo loosing alot of coolant everyday.
Got a 06 c15 twin turbo loosing alot of coolant everyday … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Just doing some research on an issue with coolant ending up
Just doing some research on an issue with coolant ending up in my fuel/water separator, Cummins ISX CM 2250 … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
414 satisfied customers
I have a c15 that is blowing the rubber hoes off between the
I have a c15 that is blowing the rubber hoes off between the air cooler and the side of head. Any possible causes? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have replaced the injector cups on a detroit and they
I have replaced the injector cups on a detroit and they allow fuel to go into the coolant. On a volvo engine what do the cups seal? Also is there special tooling needed to rplace the cups?… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Diesel fuel in coolant Mack truck 2002 E-tech engine JA: Sometimes
Diesel fuel in coolant Mack truck 2002 E-tech engine … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have Detroit s60 it mixed diesel in the oil panel I takes to the sh
I have Detroit s60 it mixed diesel in the oil panel I takes to the shop they removed all 6 injector and they said number 2 is bad they change number2 and the put the rest back in with new o ring start… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Me. Cat Man, Is there anywhere else fuel can leak into the
Me. Cat Man, Is there anywhere else fuel can leak into the cooling system on c15 other than by the injector sleeve orings?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
if compression leaks past an injector and goes into the fuel
if compression leaks past an injector and goes into the fuel return can it repaired by injector replacement.or does the head have to be machined where the injector seats in the head.its a c15 cat.… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a c15 and it got fuel in the coolant. We did the
Hi I have a c15 and it got fuel in the coolant. We did the injector cups and o-ring and flushed the system and its doing the same thing. What else could it be?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
Have a 2006 kenworth T600 with Cat C-15 in it. Doesnt seem
Have a 2006 kenworth T600 with Cat C-15 in it. Doesn't seem to have pulling power with load hooked up to it and have to shift between gears alot. Power ok no load. Had a bad turbo and replaced. Also e… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have a 2003 freightliner with a cat c15 in it it seems to
I have a 2003 freightliner with a cat c15 in it it seems to go thru about 2 gallons of antifreeze a week in the winter but uses none in the summer. We have pressure tested the cooling system and it se… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 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

10,220 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

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

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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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