Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

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

This answer was rated:

I have a detroit 60 14L. I suddenly have a loss of oil

pressure. 19.7psi at idle and...
i have a detroit 60 14L. I suddenly have a loss of oil pressure. 19.7psi at idle and 38.6psi at 1600rpm. buzzers go off yet I can let off throttle to get it home. I replaced oil pump, oil pressure relief and all orings associated. I still have same issue. I have not changed the oil pressure regulator yet...could this be my problem? I also have cut open and inspected oil filters and no bearing material. any thoughts. this truck always has 50 lbs on hwy and 25lbs at idle.
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 1 hour by:
3/8/2019
Technician: Daniel Wilson,
 replied 3 years ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 15,139
Experience: Owner at DJ Wilson
Verified

Hi, My name is***** will be glad to help. We can follow up as needed on here, Give me some time to review your information and follow up with my responses. Professionals are not employees of the site but users of the site and help on here as time allows in between jobs, family, etc. Response time can vary depending on my work load each day but I will always respond back on my next available login. Feel free to respond back at anytime if for any reason we seem to get separated, for status, etc.

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 3 years ago

I would take a close look at your rod and main bearings. If this engine has any type of miles on it, I recommend rolling a set of bearings in it. At the same time inspect your crankshaft journals for wear. This is the main cause for low oil pressure. You could always go for the pressure regulator but I would look at your bearings first. It is a pleasure to help anyway I can.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
ok....are you familiar with the Detroit 60's?
Technician: Daniel Wilson,
 replied 3 years ago

Yes

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
I was trying to avoid rolling a set of bearings in it. I thought this came on too sudden for a bearing situation....I have no bearing noise either....If I had spun a bearing then I would certainly hear that.I could be wrong....I have never rolled a set of bearings in....it does have some miles on it....I should go ahead and get some ordered and just do it.I would hate to roll bearing in and then it have the same problem....just trying to rule out any other possiblity.
Technician: Daniel Wilson,
 replied 3 years ago

While you can check your clearances with plastigage... Also you can drop a main and Rod cap to take a look. As far as the possibility of any cam, rod or main bearing issues, you can cut open the filter with a filter cutting tool, cut out a decent size sample with a utility knife , then squeeze out the excess oil in a vice, then look for any signs of bearing material inside the filter paper.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
I have cut ope the filters already....virtually no bearing material.
Technician: Daniel Wilson,
 replied 3 years ago

Also, if you have Jake's on this, check for leaks around the Jake housings dumping off oil pressure.

Virtually? Meaning there was some?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
it seems there was tiny amount of shiny flakes.....
Technician: Daniel Wilson,
 replied 3 years ago

That is a concern. It has to be coming from somewhere... It only cost and oil pan gasket and some oil to drop the pan and inspect your rod and main bearings visually to see if any of the bronze is showing or if they are scored, etc. if they look okay, check the operand for possible cam bearing issues. Another thing that can start to produce metal would be a start of a bull gear failure. If something's producing metal, you could potentially have a plugged oil galley causing a drop in oil pressure.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
well it seems with the miles....over a millipn I should just roll them in. do you have a procedure on rolling them in that I can follow. I will get the parts ordered. like I said the pan is off already. If Im going to inspect, I might as well just do it.
Technician: Daniel Wilson,
 replied 3 years ago

I will get you the torque specs. When you drop the caps down leaving the end ones till last report the crankshaft, you can use a mini screwdriver with a dull tip to start to push the bearing around. I then use a brass brake rivet or soft metal roofing nail. You want to use soft metal so it don't score any of the surfaces. You put that into the oil gallery on the Journal, then you have somebody bar the engine over by hand in the direction to roll the bearing out of the Journal. You roll the new one in the opposite way. Be sure to use plenty of engine assembly lubrication. Make sure that the locking tabs line up install the lower bearing the same way on the cap. Install the caps and torque to specs. Rod bearings you would roll the engine over to line up the ones you are working on. Those are easier to do both the uppers and lowers.

Click below for the torque specs.

Service information

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
Ok thanks any other tip or tricks to do let me know.
Technician: Daniel Wilson,
 replied 3 years ago

That is pretty much it. Be sure to use plenty of engine assembly lube.

Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 15,139
Experience: Owner at DJ Wilson
Verified
Daniel Wilson and 87 other Medium and Heavy Trucks Specialists are ready to help you
Ask your own question now
Customer reply replied 3 years ago
I have completed the main bearings. I have a picture. Just wondering if they were bad enough to cause the loss of oil pressure. I dont know how to upload picture.
Technician: Daniel Wilson,
 replied 3 years ago

Thanks for the update. There should be a paperclip icon above your chat box to upload any saved files from your computer.

Click on this link. This will tell you with photos how to check them and the causes of failure.

Failure analysis

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
I think I got it to upload...what do you think. Obviously they needed replaced....just not sure if this would have caused sudden oil pressure loss. (one day drop at 1600rpm from 50 to 30psi) what do you think?I will start on rod bearings today...
Technician: Daniel Wilson,
 replied 3 years ago

Those are definitely junk, especially in the middle ones that have the scuff marks. What are you getting for oil pressure now? With those scuff marks, it very well possibly could have been something ran through that journal and caused that, causing the drop in oil pressure. I would expect that the oil pressure definitely wouldn't be hundred percent with bearings in that condition.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
ok.....I wont know my oil pressure until I finish the rod bearings today and put everything back together.
Technician: Daniel Wilson,
 replied 3 years ago

The only other thing that I can think of that will cause a drop in oil pressure is your cam bearings or a problem with an oil passage either through the head gasket or leakage at your Jake's. You can run the engine at idle and manually engage your Jake's with the Jake's solenoids. Look for excessive oil leaks,

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
Hello, I have replaced oil pump, regulator, relief valve, main bearings, and rod bearings. Still low oil pressure. What else to you think it may be?
Technician: Daniel Wilson,
 replied 3 years ago

My previous statement. The only other thing that I can think of that will cause a drop in oil pressure is your cam bearings or a problem with an oil passage either through the head gasket or leakage at your Jake's. You can run the engine at idle and manually engage your Jake's with the Jake's solenoids. Look for excessive oil leaks.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
Ok....have you heard of missing cup plugs in rocker arm shaft? I saw that symptom in service manual. I guess it is time to go up top and see what we find. I am not sure what you mean by manually testing jakes. This would cause low oil pressure?
Technician: Daniel Wilson,
 replied 3 years ago

I'd take a look up top.... You can manually engage jakes by pushing the center of the solenoid with a screwdriver. Monitor for excessive leaks at idle.

I found this publication for oil flow as well.

Service information

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 3 years ago
are cam bearings very difficult? can they be rolled in similar to the main bearings? do you have a procedure to follow for the cam bearing replacement?
Technician: Daniel Wilson,
 replied 3 years ago
Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Daniel Wilson Your Own Question
Daniel Wilson
Daniel Wilson
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 15,139
15,139 Satisfied Customers
Experience: Owner at DJ Wilson

Daniel Wilson is online now

Related Medium and Heavy Trucks Questions
I have a 2007 freightliner century with a 14L detroit S 60.
I have a 2007 freightliner century with a 14L detroit S 60. I am currently pulling the cylinder liners. The liners seem to be rusted on and the special tool just slides up by itself with out the liner… read more
Gary A.
Gary A.
Associates in Diesel Technology and Business Management
8 satisfied customers
2008 Freightliner Columbia 14L 60 series can a bad head lead
2008 Freightliner Columbia 14L 60 series can a bad head lead to diesel getting into motor oil? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
608 satisfied customers
I have a Detroit question. A 14l series 60 Detroit. Just
It's a 14l Detroit esn 06r1017670 with low fuel psi… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
What's the torque specs and torque sequence for a 14L 60
What's the torque specs and torque sequence for a 14L 60 series detroit valve cover, it's a 1 piece cover with 10 bolts. Do I have to put any type of sealant besides the gasket? Serial # is 06R0856833… read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 satisfied customers
2004 freightliner detroit 60 oil pressure running about 75 -
2004 freightliner detroit 60 oil pressure running about 75 - 80 at first start up and blowing the seal out of oil filter. using strap wrench to tighten oil filters but after few short minutes oil filt… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
15,139 satisfied customers
1999 Freightliner Century Class12.7L Detroit. The engine has
1999 Freightliner Century Class12.7L Detroit. The engine has 49.5 LBS at 1500 rpm and drops to 22 LBS at idel. just want to get a second opinion of the issue… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
608 satisfied customers
I have a question about my 2009 Detroit 14.0. i suddenly
I have a question about my 2009 Detroit 14.0. i suddenly dropped 50% of oil pressure. Meaning one day it is 40lbs at idle and 50lbs down the road. Then same day it is 28lbs at idle and*****at 1600rpm.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have a 2009 detroit 14l. suddenly low oil pressure. like
Hello, I have a 2009 detroit 14l. suddenly low oil pressure. like 10-15 lbs at idle. just under 25 at 14-1500 rpm. buzzers go off. if I back off throttle and breing motor down to 10 to 1100 rpm light … read more
Expert
Expert
5 satisfied customers
I have a 2000 Freightliner with a 60 series detroit. The red
I have a 2000 Freightliner with a 60 series detroit. The red oil light and yellow check engine light is on constantly with a constant buzzer going the whole time operating. If i check the codes, i onl… read more
Expert
Expert
5 satisfied customers
I have had a low oil pressure problem for awhile. Comes and
comes and goes now thick shit off while idling and I can't get any pressure at all … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
608 satisfied customers
I have a Cascadia 2008 with Detroit series 60 14l execessive
I have a Cascadia 2008 with Detroit series 60 14l execessive oil burn 2gallons every 100 miles too much smog smell like burn oil and also by smog caming from crankcase has(###) ###-####miles … read more
timdieseltech
timdieseltech
lead diesel tech, shop owner
Vocational, Technical or Trade School
213 satisfied customers
I have a 2000 model FLD 120 freightkiner with a 12.7L 60 Ser
Customer: Hello, i have a 2000 model FLD 120 freightkiner with a 12.7L 60 Ser Detroit. Been running great and strong since 2000. we suddenly in the last couole of days noticed the engine oil building … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
15,139 satisfied customers
Have 99 n 14 select cummins. Just did full rebuild when started
Have 99 n 14 select cummins. Just did full rebuild when started the gauge in dash along with passenger back oil rifle are only reading 20 lbs. computer keeps shutting down motor not enough oil pressur… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,886 satisfied customers
hey,i just replace a cranshaft on a detroit 12.7.replace the
hey,i just replace a cranshaft on a detroit 12.7.replace the oil pump,regulator,o ring,relief valve,oil pressure sensor .the truck cannot old oil pressure.and it will shut down.… read more
Expert
Expert
5 satisfied customers
A 1994 Kenworth with a series 60 detriot. Wondering what
A 1994 Kenworth with a series 60 detriot. Wondering what would make the oil pressure start to fluctuate? Every once in awhile it will drop and shut down the truck, but then starts up again and the oil… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
15,139 satisfied customers
Mr. Cat Man are you familiar with the Detroit 60 series 14L.
Mr. Cat Man are you familiar with the Detroit 60 series 14L. I have one that will make 50 pounds of boost and then will pop and let the boost go down. I've replaced the v-pod and diff pressure sensor.… read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
627 satisfied customers
I just did an out of frame on a Series 60 DDEC 3. The truck
I just did an out of frame on a Series 60 DDEC 3. The truck had a broken crank. I found another crank, had it Magna Fluxed. cleaned, tested for hardness and measured. I Plastigauged all rods and mains… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a 1997 frieghtliner with a detroit diesel series 60.
I have a 1997 frieghtliner with a detroit diesel series 60. The check engine light, and oil pressure indicator comes on along with the buzzer when u start the truck. Checked all the fluids and everyth… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
15,139 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

15,139 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