Banks Power Chevy_GMC Trucks: Diesel ’82 - 93 6.2L Forced Induction- Sidewinder Turbo System (late-body) - Manual (Page 19)

CHeCking engine PerFOrManCe
Your BanKs turbocharged diesel engine should
exhibit the following operating characteristics:
cruise conditions (constant 60mph on level
road): egT should be approximately 400°f;
boost gauge, if so equipped, should read 1 to
1 1 ⁄
2
pounds.
High Load conditions (uphill with heavy
load): egT should typically be 900 to 1000°f,
with 1100 as a maximum; boost levels may
approach 9 pounds.
It is important to realize that diesels, unlike
gasoline engines, run cooler with additional air.
exhaust gas temperature rises as more fuel is
added. Turbocharging a diesel typically lowers
the egT. normal cruise condition egT for a nor-
mally aspirated (non-turbocharged) diesel engine
is typically 600 to 650°f. as noted above, cruise
condition egT for a turbocharged diesel is typically
400°f. This lower egT translates directly to lower
piston and valve temperatures, and significantly
increased engine life.
It is also important to understand that turbo-
charged boost pressures are load related, that is
the turbocharger makes boost only when called
upon to do so (by load requirements). The turbo
will not “make boost” with the transmission in
neutral, but makes boost proportional to the load.
Long uphill grades, with a heavy load, will result in
maximum boost. In other words, the turbo makes
boost only when it is needed. This characteristic
makes turbochargers so attractive that the vast
majority of long haul trucks and off-road earth
moving equipment are equipped with turbocharg-
ers. Turbocharging typically results in more power
and torque, better fuel economy and increased
engine life.
TUrbO engine MainTenanCe
Oil anD Oil FilTer
change engine oil and filter every 3,000 miles. use
oil and filter specified in owner’s manual for type
of climate/duty encountered.
air FilTer
visually inspect filter element every 8,000 to
10,000 miles of running, more frequently in dusty
conditions. Wipe clean the inside of the filter hous-
ing halves upon inspection of filter. a dirty filter
can cause a loss of boost and rise in egT. clean at
least every 20,000 miles.
air inleT rUbber elbOW
visually check outside of air inlet elbow every
three months for cracks or deterioration. an elbow
that has become soft may collapse under turbo
suction causing a loss of boost and higher egT.
HeaT sHielD FOil blankeT
visually check foil heat shield every three months
to insure it is in place (has not slid down pipe) and
in good condition.
injeCTOr reTUrn HOse lOOPs
visually check hoses between injectors every three
months for cracking or deterioration, replace as
necessary. check that hoses are tied away from
manifold and heat shields.
egr ValVe VaCUUM HOse
visually check condition of egR vacuum hose (blue
silicone hose inside of pressure chamber) every
three months. a cracked or disconnected hose
will cause the engine to run rough with high egT.
Replace as required.
baTTerY TerMinal PlasTiC CaP
visually check that plastic cap is in place on right
hand positive battery terminal every three months,
and anytime the battery or air filter is serviced.
This cap protects the terminal from accidental
shorting.
19
adJusTMenT section. a high egT can also be caused
by a restrictive exhaust system.
We recommend engine oil temperature be below
220°f, as measured in the oil pan (an optional oil
temperature gauge is available from gaLe BanKs
engIneeRIng). Optimum oil temperature is 220°f.
continuously high oil temperature is indicative of the
need for an additional oil cooler. If you do not have and
oil temperature gauge, watch your oil pressure. falling
oil pressure under a heavy load is caused by rising oil
temperature. Use caution.
We recommend that coolant temperature, also, should
not exceed 220°f.
P.n. 96292 V.2.0