spark plugs replace CADILLAC SEVILLE 1993 4.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine License Plate Light ...................................... 194
Park and Tbrn Signal ................................ 2357 NA
Rear Fog/Back-Up Light (Export)
...................... P21/5W
Side Marker Lights ..................................... 194
StopmailPurn Signal ................................ 2057 NA
Stopmailmurn Signal (Export) ......................... P21/5W
Trunk Light ........................................... 1003
Underhood Light ....................................... 561
Vanity Mirror Illumination ............................... 124
NOR", IMANTENmCE REPLACEMENT
PARTS (4.9 LITER ENGINE)
Air Cleaner Element ........................ AC Type AlU96C2
................................................. 5096932
Batte ............................................... 78A-72
Fuel Filter Element .......................... AC Type GF-581
................................................ 25121468
Engine Oil Filter ............................. AC Ty e PF-45
PCV Valve ................................ AC Type CV-774C
................................................. 6487779
Spark Plugs .................................. AC Type 41-902
................................................. 5614235
Serpentine Drive Belt ............................... 3528110
Radiator Cap ................................ AC Type RC 27
................................................. 6410427
Thermostat ........................................ 3528974
Upper Radiator Hose ................................ 3521235
Lower Radiator Hose ............................... 3521237
Trans Filter ........................................ 8651909
TransPanGasket ................................... 8668028
................................................ f 5010324
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Downloaded from www.Manualslib.com manuals search engine I
The Northstar engine is designed to require less maintenance than many
other
DOHC V-8 engines. Engine systems are designed to remind the
driver when service is required.
An oil life index indicator monitors
ongoing operating conditions and reminds the driver when an oil change
is needed.
A low coolant warning message keeps track of the level of this
vital fluid. Direct acting hydraulic tappets provide maintenance free zero
lash operation
of the 32 valves from idle to the 6500 rpm redline. The
camshafts are driven by a two stage roller chain assembly which is
designed to provide quiet maintenance free operation. Platinum tipped
spark plugs increase the replacement interval
to 100,OO miles.
The four valve per cylinder design provides more efficient engine
breathing which results in higher power than comparable
two valve
engines. The central location
of each spark plug ensures a fast and
complete burning
of the fuel/air mixture. The induction system uses
smooth thermoplastic tubes
to channel air into the cylinders. The
smoothness
of the tubes is equivalent to the elaborate port polishing
methods used for race car engines. Careful design using the shape and
length
of the tubes boosts horsepower by using sonic pressure waves
created by the motion
of the inlet valves to increase the amount of air
entering each cylinder.
The Northstar engine
is also designed to be very durable. The aluminum
block has cast-in-place iron cylinder liners for greater wear resistance.
High strength forged steel connecting rods support the free floating
piston pins
in bronze bushings for superior high speed performance. The
fillits
of the nodular iron crankshaft undergo a high pressure compression
rolling operation
to improve their resistance to fatigue.
Quiet operation
is enhanced by the use of special materials and designs.
The front cover of the engine is stamped from laminated steel which
damps out noise. Special cam cover gasket seals isolate valve train
operation.
The fuel injectors are placed inside the induction system
housing
to eliminate the clicking noise which is common to other fuel
injected engines.
The Northstar engine
is designed to provide years of efficient, reliable,
satisfying operation. We
think it is also just plain fun to drive.
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