Medium and Heavy Trucks

Have Truck Repair Questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

Medium and Heavy Trucks

Have a question on an international dt466. 1999 3800 school…

Customer Question
Have a question on...

Have a question on an international dt466

Mechanic's Assistant: What is the complete model and serial number of your machine?

1999 3800 school bus engine. dont have serial handy

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

Just started blowing white smoke out the breather tube today and proceeded to get coolant in the oil.

Mechanic's Assistant: Anything else you want the equipment mechanic to know before I connect you?

No loss of power everything seemed fine. just happened quick and started dumping coolant in the oil. trying to see what direction to go to verify weather its a head gasket, oil cooler or something internal

Submitted: 2 months ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 9 minutes by:
12/21/2017
Technician: Curtis B., Technician replied 2 months ago
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 29,670
Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.
Verified

Welcome to JUST ANSWER heavy equipment. With years of experience, I look forward to doing my best to help.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 2 months ago
sounds good. just trying to get headed in the right direction for proper diagnosis
Technician: Curtis B., Technician replied 2 months ago

Remove the oil pan, and pressurize the radiator and watch for the coolant leak. Then you have an idea as to its source. Not going to be oil cooler, as oil pressure is higher than water pressure. I would suspect a cylinder has pinhole from corrosion.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 2 months ago
is this common? The engine has 190k miles. been running perfect and just started to blow smoke out the valve cover breather oil looked fine. drove it 12 miles back our shop and had milky oil in that short distance. but running fine
Technician: Curtis B., Technician replied 2 months ago

1999 model will be 18 years old, and if the coolant hasn't been replaced and rust inhibitor added, it can happen. And it happens suddenly.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 2 months ago
I just put the engine in this truck a few weeks ago which came out of a school bus that just came our of service and was very well maintained. So not sure if that plays into it but is there much chance its an injector or head gasket?
Customer reply replied 2 months ago
Otherwise I'm looking at an inframe basically?
Customer reply replied 2 months ago
is that a possibility on injector or head gasket or not likely?
Technician: Curtis B., Technician replied 2 months ago

Sorry, I left a few minutes to have supper with the wife. To check if it is injector tubes, run the same pressure test as for oil pan removal, and with rocker cover removed, watch for coolant in the cylinder head, around the injector location. The head gasket leak would show as coolant dripping into oil pan area, from the ends of the cylinder block.

Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?
Ask Curtis B. Your Own Question
Curtis B.
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 29,670
29,670 Satisfied Customers
Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.

Curtis B. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

2,322 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,247 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,640 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,019 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

cumminsdr

cumminsdr

Mechanic

1,225 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

29,670 satisfied customers

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

dieseldan55

dieseldan55

Contractor

74 satisfied customers

Road Service mechanic for Volvo Construction.

< Previous | Next >

Related Medium and Heavy Trucks Questions
I have low HP caterpillar 3406e(2ws08414) with a
I have low HP caterpillar 3406e(2ws08414) with a stock(###) ###-####camshaft. One of my injector lobes is starting to get worn down. I ordered a replacement camshaft through YNG LLC. They sent me(###)… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I got a 2005 m2 business class with electrical problems I
I got a 2005 m2 business class with electrical problems I turn on the right hand blinker on the switch and the left blinker comes on instead of the right … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
2007 freightliner columbia, cat 15, motor is not working,
2007 freightliner columbia, cat 15, bunk motor is not working, there is no power at b fuse box, close to driver side, can any body help me… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Vocational, Technical or Trade School
2,019 satisfied customers
I started my d4G dozer after it had not been run for a
I started my d4G dozer after it had not been run for a couple of weeks. The ECM light came on. The machine will move in the lowest speed only. The ECM light is lit on both the dash and the fuse panel.… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I have a 2016 m2 freightliner with a 6.7 cummins that needs
i have a 2016 m2 freightliner with a 6.7 cummins that needs a block due to vehicle collision. ESN is 58589558. this is a DEF engine. i have located an engine core ESN is 73060509. this is not a DEF en… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,225 satisfied customers
I have a Cummins isx and a yellow check light active fault
I have a Cummins isx and a yellow check light active fault code spn6780 and fmi3 … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a freightliner with a 164 009 7 code I just need to
I have a freightliner with a 164 009 7 code I just need to know what it is … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a 2000 International 4700 with a DT 466. The truck
Hi, I have a 2000 International 4700 with a DT 466. The truck starts and runs fine as I use it every day. It will start and run fine if it sits for 4 days. If I leave it 5 or 6 days it will start, beg… read more
Curtis B.
Curtis B.
Technician
29,670 satisfied customers
Class 8 truck 3 brake shoes work fine the one I have problem
class 8 truck 3 brake shoes work fine the one I have problem with is it does not return all the way back when pedal is released . so this is resulting in a draging brake which takes it out of adjustme… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
I have a 2006 Pete 359 with a Gefco 30k drill. Sorry my bad.
Low power from nxs c15 boost is 38 psi this engine is rated at 550. When my compressor is running the engine should be at 1850rpm. 1700 rpm is max. If I turn on headlights it drops another 25 rpm. I'm on my 3rd ecm. The only code that pops is a ghost to computer. It happens first when engine is cold. We have lower power. White smoke. Only way to clear it is to set the cruise and accelerate with the cruise. Then we get full power and code disappears. But it's still not giving me the full 550 hp. I'm not getting any help from peterbilt mechanics. There are no turbo or intercooler leaks. No bad fuel lines. We are constantly changing fuel filters The slightest restriction causes low power. The one thing that's different from this and a road truck is that it requires full hp with the driveline not turning the rear axles. So programming the computer correctly is most important. The rig drills in 7th high. Throttle is set at 1850 rpm. The compressor on the rig is my dyno. You tell me what sensors or fuel pressures to look for or change and I can do a performance test with the compressor. Thanks Driller … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a 1978 mack U600 single axle dump. I removed the
Hello Don I have a 1978 mack U600 single axle dump. I removed the brake valve last year. I have a new one from a Mack dealer. BUT have lost my diagrams to connect all hoses.… read more
don
don
fleet superintendent
Vocational, Technical or Trade Scho
12 satisfied customers
Eec 61 spn4336 fail 5. Freightliner Cassidia 2012. Need to
Need to talk to mechanic who can tell me what to try … read more
roy
roy
Associate Degree
3 satisfied customers
I have a 2011 international with a VGT over duty cycle code.
i have a 2011 international with a VGT over duty cycle code … read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
396 satisfied customers
I have a 1972 deere 820 3 cyl tractor wiht a hydraulic
i have a 1972 john deere 820 3 cyl tractor wiht a hydraulic problem im not looking for a membership and i want to know the cost upfront for the fee i just bought it has an add on john deere 47 loader … read more
Curtis B.
Curtis B.
Technician
29,670 satisfied customers
I have a 2016 glider with pre 2000 N14. Eng # 11828333 465
I have a 2016 glider with pre 2000 N14. Eng # 11828333 465 hp. Driver complaint that is "studders" when he upshifts in high range. at 1150 rpm to 1400. Once he gets past that it clears up. It will do … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,225 satisfied customers
I'm needing engine performance specs for a 2012 maxxforce
I'm needing engine performance specs for a 2012 maxxforce DT. I need crankcase pressure reading limits in particular. I am ordering the proper tool to check. VIN # DB156933… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I have a international 9200i with the ISM Cummins. Having
I have a international 9200i with the ISM Cummins. Having problem with the rear Jake brake being power when key is turn on. Even if Jake switches are unplug in dash. Actuator plug on ecm pin 44 has 12… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
396 satisfied customers
I am working on a 2011 maxxforce that cranks but will not
I am working on a 2011 maxxforce that cranks but will not start. I'm fluctuates between 500 and 1200 psi. Checked all fuses and they are good. Engine rpm is 120 to 130 while cranking. Fuel pressure is… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
396 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.

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