Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
Just did a rebuild on a c12 2KS. Refurbished crank and
Just did a rebuild on a c12 2KS . Refurbished crank and block. Replaced oil pump/cooler /oil filter base and did a gold kit from cat. Problem i have is low oil pressure at idol 6-8.5 lbs … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
62 satisfied customers
Random oil pressure issues in a isx 2350. A 2015 Kenworth
Issue started happening after high pressure oil pump failed. We engine harness, oil pump, oil cooler. Main bearings. New sensor too … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
62 satisfied customers
CAT MAN I HAVE A 07 C 15 ACERT 100000 ON INFRAME RUNS GREAT
CAT MAN I HAVE A 07 C 15 ACERT 100000 ON INFRAME RUNS GREAT 60 LBS OIL PRESSURE 5 TO 6 K MILES THEN STARTS LOOSING OIL PRESSURE 14 HUNDRED RPMS 48 TO 50 JUST STARTED THIS. REPLACED RODS AND MAINS CHEC… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,846 satisfied customers
I have an ISX 870 SEN 79227481 oil pressure at the sensor is
I have an ISX 870 SEN 79227481 oil pressure at the sensor is 10 psi when warm and 20 psi at the oil filter housing. Has new oil pump and rod and main bearings. When start up cold oil pressure is 30 ps… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
N14 celect plus, just for general knowledge, what is the
N14 celect plus, just for general knowledge, what is the purpose of the oil bypass valve located in the oil filter housing just above the oil filter… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Trucks oil pressure drops to zero when rpms drop down to
Trucks oil pressure drops to zero when rpms drop down to idle. But go oil pressure rises back to 20psi like normal. The low pressure alarm goes off. Also when at normal driving conditions truck has go… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
CATMAN c12 engine. low oil pressure. oil looks thin and
CATMAN c12 engine. low oil pressure . oil looks thin and runny,. i suspect fuel . but all injectors are testing OK on CAT et… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Im getting low oil pressure on this 3176 cat... i just
im getting low oil pressure on this 3176 cat... i just change the oil. drove it for 7 miles the oil pressure drop to 25psi..… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
C12 oil pressure dipping below 10psi. Bought this engine,
C12 oil pressure dipping below 10psi. Bought this engine, but it in and have not had any oil pressure since. Was told the motor had 161K on a fresh inframe. I have changed rods/mains, flushed engine, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
C12 on the oil filter housing has oil pressure valves. 2 on
C12 on the oil filter housing has oil pressure valves. 2 on side of housing and 1 on the top. What do these do?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I am having problems with a cat engine C15. It was
I am having problems with a cat engine C15. It was working good and in a while it gives low oil pressure. oil and oil filter is new. I have check oil level and is good. what can be the problem?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
have an 06 mxs with low oil pressure pulled valve cover no major oil l
have an 06 mxs with low oil pressure pulled valve cover no major oil leaks from housings. pulled filter bypasses look ok. has 1-=20 at idle 30-40 at speed than low oil pressure warning comes on… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Hi, I have 2x Cat C12 's in a cruiser the engines are several
Hi, I have 2x Cat C12 's in a cruiser the engines are several years old but have only 80 hours but oil pressure warning comes on . Replaced sensor ,no change. oil and all filters changed Cat 15 w 40 u… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I just did a major out of frame on a 3406b new oil pump no
I just did a major out of frame on a 3406b new oil pump no leaking on jakes good pressure to the filter but low to nothing oil pressure?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Im working on a c15 cat engine, engine oil pressure was acting
I'm working on a c15 cat engine, engine oil pressure was acting funny, driver of the truck said driving down the road the oil pressure started dropping to about 15, coolant temp was 190 and oil temp w… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have a 2007 Peterbilt 387 with a C 15 Cat engine. I noticed
I have a 2007 Peterbilt 387 with a C 15 Cat engine. I noticed my oil pressure was 20 lbs lower than normal. I thought the filter waa plugged so I had an oil change done. I let my truck sit off for an … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
We have a 2000 mack ch600. With a mack engine. We lose oil
We have a 2000 mack ch600. With a mack engine. We lose oil pressure when the unit warms up. We have already pulled the main and rod bearingas and inspected no damage or wear. What could be the source … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Hello, I have a oil pressure concern with a C13 motor. This
Hello, I have a oil pressure concern with a C13 motor. This motor is a 2005 motor installed in a MCI motorcoach. This past April we replaced the main and rod bearings because the oil pressure was runn… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

14,846 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x