Compression Ignition Addict
Join Date: Mar 2011
Location: wichita ks
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OK, so a few ISSUES HERE
Why did the head gaskets blow? Did the dealer check the ECT vs EOT delta? Did they check for a bad oil cooler and or EGR cooler?
With all the water flowing past the turbo there is a great chance it is rusted and gummed up. Your turbo needs cleaned. The dealer may not have got the turbo sealed and you my be having exhaust leaks keeping your turbo from getting up to full performance.
You have more than one issue to deal with here I am sure of it. PLEASE read the t-shooting guide in my signature and that will explain a lot of whats going on here. GOOD LUCK.
Q: How do I know if my turbo is bad.
A: A turbocharger is a very simple device basically 2 windmills on one shaft. A lot of “ bad turbo’s” on 6.0’s are simply dirty and can be restored to proper working order in about 4 hours and a little elbow grease. The exception is if the bearings are bad or if it has more than about .004 in of end play or if you can move the shaft side to side enough to cause it to rub the housing. If you can spin it by hand and it seams to move freely then there is a good chance it’s fine. Most turbo problems are bad bearings , cracks in pressurized components like hoses, boots , intercooler , or excess carbon and soot.
From time to time a VGT solenoid will fail ,but this is pretty rare. One more thing is to inspect for damaged compressor blades. The major cause fo this is aftermarket air intakes. The best thing you can do to keep your turbo happy for a long time is keep it cool and lubed and clean. This means stick with the OEM air filter unless you need to make more than 500HP.
Q: Turbo charger spools up slowly
A: VGT solenoid bad or unplugged, Low boost due to leaking CAC boots or tubes, Exhaust Leak to turbo turbo vanes are coked up with rust and carbon.
Q: Turbo charger builds to much boost
A: vanes are coked up with rust and carbon, hot tune , stuck or faulty VGT solenoid.
Q: Low Boost levels
A: VGT solenoid bad or unplugged, Low boost due to leaking CAC boots or tubes, CAC tank cracked Exhaust Leak to turbo turbo vanes are coked up with rust and carbon.
Q: Wrench light when towing and engine looses power
A: Some newer PCM flashes monitor EOT vs ECT delta and when it exceeds 15 deg the truck will go into limp mode. Your oil cooler is obstructed and needs to be replaced. This is a good time to do a cooling system flush and an EGR delete. This can also be caused by a t-stat that is stuck open and not allowing the coolant to warm up.
Q: Do I have a blown EGR cooler?
A: Remove the EGR valve and look down the hole, some times the truck will have to be parked nose down over night. If you see any wetness, wet gooey soot, or it looks steam cleaned, your EGR cooler is bad. This is a good time to do a delete if you can, if you can't I would recommend a new cooler from bullet proof diesel.
Q: What is the delta between EOT and ECT?
A: Delta refers to the difference between the oil and coolant temperatures. This delta should not exceed 15 deg F , if it does once the truck it up to operating temperature going straight down the highway your oil cooler is plugged up.