School Bus Fleet Magazine Forums
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 Professional Garage
 Enter Forum: Professional Garage
 08 Maxforce dt
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

willism
Advanced Member

United States
250 Posts

Posted - 10/02/2014 :  05:02:11 AM  Show Profile  Visit willism's Homepage  Reply with Quote
Symptoms are low coolant level orange triangle and red stop sign at start up with overheat on test drive.

Coolant is full coolant level sensor has been replaced and wiring checked. Thermostat and water pump has been replaced pressure tested no leaks anywhere. Fan is kicking on properly. Inspected coolers they checked out fine changed them 6 months ago along with egr valve and a set of injectors with pucks. Talked to my dealer they are going to try and reprogram them but there 2-3 weeks till they can have a tech out my way anyone got any ideas?

mrschoolbus1
Active Member

15 Posts

Posted - 10/02/2014 :  4:43:33 PM  Show Profile  Visit mrschoolbus1's Homepage  Reply with Quote
Start with checking and providing all DTCs' Must have some with triangle lamp on . Is it pushing coolant out of the cap or just getting above critical temperature ? How hot ? 218 - 224 ? 224 set a critical Overheat DTC and will de- rate the engine. Also is there a brass orifice in the de-airation hose before the surge tank coming from the top of the EGR cooler.
Go to Top of Page

willism
Advanced Member

United States
250 Posts

Posted - 10/03/2014 :  04:28:11 AM  Show Profile  Visit willism's Homepage  Reply with Quote
Getting to 230 then derating from there no coolant coming out of the cap. Only dtc's is for over-temp and low coolant and it does have the orifice.
Go to Top of Page

mhernandez73
Senior Member

124 Posts

Posted - 10/09/2014 :  03:50:30 AM  Show Profile  Visit mhernandez73's Homepage  Reply with Quote
add restrictor to coolant bypass hose. if it still comes back on replace coolant resovoir.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
 


School Bus Fleet Magazine Forums © 2022 School Bus Fleet Magazine Go To Top Of Page
This page was generated in 0.06 seconds. Snitz Forums 2000