Good info maybe even should be stickied.Concerning smoking or oil burning from turbo.
11-14-2008, 10:05 AM
#1
Good info maybe even should be stickied.Concerning smoking or oil burning from turbo. "The most common turbo complaint is one of smoking or burning oil.
Before you condem your turbo, consider the fact that even a good turbo will leak oil given certain circumstances.
Here are 4 areas to look at:
A restricted air inlet.
A restricted exhaust.
A "physical" restriction in the oil drain away from the turbocharger.
An "effective" restriction to the oil drain away from the turbo such as crankcase ventilation problems or anything that can cause excessive crankcase pressure....like worn piston rings.
Oil must drain away from the turbo faster than the oil is being fed to it. Consider the possibility that excessive oil pressure/volume might be fed to the turbo causing the bearing housing to be flooded with oil and cause the turbo to leak.
Turbochargers won't actually "blow a seal". The "seal" on the exhaust side is usually a simple "piston ring" with a small ring gap. The "seal" on the compressor side is either the same style or it is a more positive "carbon seal" similar to an air conditioner compressor seal or a water pump seal.
The reason most turbos blow oil (assuming there aren't any exterior causes) is because the bearings (usually simple full-floating bronze bushings) have failed and thereby ruined the seal surfaces.
Turbo "bearings" often fail due to lack of lubrication or dirty oil. Be sure to ensure an adaquate supply of clean engine oil for your turbo."
Before you condem your turbo, consider the fact that even a good turbo will leak oil given certain circumstances.
Here are 4 areas to look at:
A restricted air inlet.
A restricted exhaust.
A "physical" restriction in the oil drain away from the turbocharger.
An "effective" restriction to the oil drain away from the turbo such as crankcase ventilation problems or anything that can cause excessive crankcase pressure....like worn piston rings.
Oil must drain away from the turbo faster than the oil is being fed to it. Consider the possibility that excessive oil pressure/volume might be fed to the turbo causing the bearing housing to be flooded with oil and cause the turbo to leak.
Turbochargers won't actually "blow a seal". The "seal" on the exhaust side is usually a simple "piston ring" with a small ring gap. The "seal" on the compressor side is either the same style or it is a more positive "carbon seal" similar to an air conditioner compressor seal or a water pump seal.
The reason most turbos blow oil (assuming there aren't any exterior causes) is because the bearings (usually simple full-floating bronze bushings) have failed and thereby ruined the seal surfaces.
Turbo "bearings" often fail due to lack of lubrication or dirty oil. Be sure to ensure an adaquate supply of clean engine oil for your turbo."
11-14-2008, 10:08 AM
#2
Another common source of oil out the back of the engine is simply you have blown your motor. You can blow just the rings off just one piston sometimes especially stock hypercrap pistons.
They are brittle and weak and will not take any detonation. So your tune better be spot on!
They are brittle and weak and will not take any detonation. So your tune better be spot on!