Hello, I have a 2004 International RE300 with the DT466E HT engine that has started to produce a substantial amount of white blowby – especially when pulling a long grade. It produces enough smoke to leave a haze visible in the mirrors. I believe it is time for me to tackle my first engine rebuild, but I want to make sure I am not missing anything simple. To me, the bus seems to have plenty of compression (no extended cranking times when starting when cold). I run shell Rotella T6 15w-40 and have tried Luca’s oil additive with no success. The smoke coming from my exhaust pipe is clean (not white). All the white smoke is coming from the blowby tube. My oil is clean (no coolant).
Engine Details:
• 2004 DT466E 225hp High Torque (Pre-EGR)
• The engine has 210k miles and about 12k hours
• I am running a power-hungry performance tune set to 300hp
• I have a EGT sensor after the turbo and I keep the temp below 1000 when driving
• I bumped the max RPM of the engine up to 2700 unloaded and 2600 loaded
• Oil temperature stays around 180-200 consistently
• I installed a blue ox exhaust brake and build a maximum of 35 psi of backpressure
• Max boost I see under load is 25psi
Bus Details:
• My bus is heavy (35k lbs. total) and I flat tow a 4k lbs. jeep
• We also did an 18” roof raise and have a bunch of solar on the roof- so I catch a lot of wind.
• I re-geared the rear end to a 6.17 (from a 4.11) and unlocked 6th gear on my Allison MD 3060 so we top out at 75mph and cruse at comfortably at 65 (at 2100rpm)
I also developed a rear main seal leak around the same time as the blowby started. I’ve checked my air intake piping and didn’t see any signs of me dusting out the engine. Let me know if I am missing anything.
Engine Details:
• 2004 DT466E 225hp High Torque (Pre-EGR)
• The engine has 210k miles and about 12k hours
• I am running a power-hungry performance tune set to 300hp
• I have a EGT sensor after the turbo and I keep the temp below 1000 when driving
• I bumped the max RPM of the engine up to 2700 unloaded and 2600 loaded
• Oil temperature stays around 180-200 consistently
• I installed a blue ox exhaust brake and build a maximum of 35 psi of backpressure
• Max boost I see under load is 25psi
Bus Details:
• My bus is heavy (35k lbs. total) and I flat tow a 4k lbs. jeep
• We also did an 18” roof raise and have a bunch of solar on the roof- so I catch a lot of wind.
• I re-geared the rear end to a 6.17 (from a 4.11) and unlocked 6th gear on my Allison MD 3060 so we top out at 75mph and cruse at comfortably at 65 (at 2100rpm)
I also developed a rear main seal leak around the same time as the blowby started. I’ve checked my air intake piping and didn’t see any signs of me dusting out the engine. Let me know if I am missing anything.