Precision Turbo and Engine Turbocharger Installation Recommendations - Manual (Page 2)

1.
Crankcase ventilation is critical as well. If the engine has positive crankcase
pressure this will also pressurize the turbochargers oil drain. With the oil drain
compromised due to pressure this could also cause the turbocharger to leak oil.
On systems utilizing a PCV valve be sure it is of a design used for boosted
applications. Also be sure it is proper working order. (not sticking closed)
If utilizing a breather catch can system be sure you are using a minimum of a
-10AN or 5/8 of an inch inside diameter line. Also make sure the breather on
the catch can has a large diameter opening that is least 1 inch. Some push in
style breathers may have a small diameter hole in them. As for clamp on style
breathers these usually have a larger diameter opening.
Valve cover breathers should have a large diameter opening that is least 1 inch
and one breather per valve cover. Some push in style breathers may have a
small diameter hole in them as for clamp on style breathers these usually have
a larger diameter opening.
2.
Properly sized air inlets and air filters should be used. A restricted turbocharger
air inlet due to improperly sized air inlet tubing, or an air filter that will not flow
enough air may be the cause of a compressor side oil leak.
When using an air filter it must be size properly. If the air filter is too small it
will not allow the turbocharger to pull air in freely. When this happens the
filter becomes a restriction. A dirty air filter may restrict air flow as well.
When the air inlet to the turbocharger becomes restricted it may pull oil past
the compressor side seal causing an oil leak.
TURBOCHARGER LUBRICATION
All turbochargers rely on clean filtered lubrication with sufficient volume and pressure.
1.
Probably the number one cause of turbocharger failure is due to dirty or
contaminated lubrication.
It is strongly recommended that a quality paper element type filter is used.
Stainless steel mesh screen type filters typically do not have the filtering
capacity of a quality paper element type filter. Some examples of the stainless
steel mesh screen type filters are System 1, Oberg, and the Moroso Omni-
Filter.
A remote mounted oil filter housings with a dedicated turbocharger lubricant
feed line would be best.
Caution must be taken if an inline type lubricant filters are used. When using
an inline filter it must be serviced at regular intervals. Inline filters can plug
up and starve the turbocharger of lubricant if not serviced at regular intervals.