Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
We have a c15 and it is smoking and missing a lot when cold
Hi, We have a c15 and it is smoking and missing a lot when cold but the exhaust temp goes up to 1300-1500 in about 5 miles loaded, turbo pressure goes to 45-55 what could be wrong? … read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
9 satisfied customers
I have cat C15 2005 angine,and I have low 10lbs of boost
I have cat C15 2005 angine,and I have low 10lbs of boost pressure,but my pyro temp.go over 1200 to 1400 degrees .are both symptoms releated … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
My air pressure keeps going down and gets to 60 psi. It
My air pressure keeps going down and gets to 60 psi. It stays there for a couple of minutes and then starts to build pressure. This happens over and over. I took the air line loose coming out of the c… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
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I converted my c15 mxs to a single turbo. got the program to
I converted my c15 mxs to a single turbo. got the program to delete my IVA's. Everything worked well for months then out of nowhere the engine started to derate me whenever I use my eng brake. If I st… read more
Bradey V
Bradey V
Certificate
2004 cat acert c15 Diesel engine over heats only when boost
2004 cat acert c15 Diesel engine over heats only when boost pressure reaches over 30 psi with light loads and 17 psi with heavy loads. No coolant loss or oil. Compression is good on all cylinders. Wil… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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Have cat motor need some help. Dump truck 347000 miles. 2006
trying to determain wheather or not my oil pressure gauge is bad by using a manual gauge on the motor need help finding location where to connect gauge … read more
Wayne
Wayne
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Vocational, Technical or Trade Scho
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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
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Cat c15 has no boost and height exhaust temp. Turbos are
Cat c15 has no boost and height exhaust temp. Turbos are both good and there are no leaks when a pressure test is done. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
High pyro temp, new turbo and new air to air its on a acert
High pyro temp , new turbo and new air to air its on a acert(###) ###-#### Temps will go to 1200 it's has a tune and will run 60 lbs of boost … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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I need the oil pan bolt torque twin turbo c15. 2005
Changing oil pan myself only need torque for oil pan bolts … read more
Cat Man
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2007 ISX CM871 high exhaust temp and black smoke when foot
2007 ISX CM871 high exhaust temp and black smoke when foot in throttle. Truck seems to be down on power some. May not be but I don't think it has the power it should. Can I get some trouble shooting h… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 2004 c15 bridge 625 with a cat 525 program we put
Hello, I have a 2004 c15 bridge 625 with a cat 525 program we put in computer. I have a problem with the egt going high when driving in temperatures above 82 degrees. seems like any boost above 20 lbs… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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Have good oil pressure from start after engine warms up and
Have good oil pressure from start after engine warms up and under load it will derate the power over 1500 rpm will not do it if there is no load when power drops oil pressure gauge drops to 0. Rpm dro… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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Low power with slow foot throttle response with empty truck, what comm
Low power with slow foot throttle response with empty truck, what common items can cause this condition?… read more
Andy
Andy
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Vocational, Technical or Trade School
208 satisfied customers
Does dual exhaust or larger diameter exhaust effect engine temp and performance? 2004 c15
Does dual exhaust or larger diameter exhaust effect engine temp and performance? 2004 c15 475 cat coded to 550, twin turbo with 4 inch single exhaust. 4.10 gear with 18 speed eaton Pulling super-b gra… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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GA-RP 2005 kenworth t800 log truck with c-15 twin turbo engine.
2005 kenworth t800 log truck with c-15 twin turbo engine. my problem I been haveing is my water temperature, on the flat roads it doesent come to temperature doesn't get more then 50 degres on gauge ,… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
2005 kenworth t800 log truck with c-15 twin turbo catmy
2005 kenworth t800 log truck with c-15 twin turbo cat my problem is my water temperature lately I can get any temperature out of it ,on the flats its lucky to get to much over 50 deg , but when pullin… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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07 International 9400I C15 ser# XXXXX like NXS 12757 not sure
07 International 9400I C15 ser# XXXXX like NXS 12757 not sure of first letter, roughed up. Bought two months ago have put seven thousand miles on it, runs good but has no power on hills. After hard pu… read more
Cat Man
Cat Man
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10,245 satisfied customers
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Daniel Wilson

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Chris (aka-Moose)

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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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