Chevrolet LT4 Manual De Uso página 10

Note: Removal of the spark plugs will allow the engine to spin faster and build oil pressure faster.
Once the ignition control system has been disconnected, crank the engine using the starter for 10 seconds and check for oil
pressure. If no pressure is indicated, wait 30 seconds and crank again for 10 seconds.
Repeat this process until oil pressure is indicated on the gauge.
Reconnect the ignition control system. Start the engine and listen for any unusual noises. If no unusual noises are noted, run
the engine at approximately 1000 RPM until normal operating temperature is reached.
When possible, you should always allow the engine to warm up prior to driving. It is a good practice to allow the oil sump and
water temperature to reach 180°F before towing heavy loads or performing hard acceleration runs.
The engine should be driven at varying loads and conditions for the first 30 miles or one hour without wide open throttle
(WOT) or sustained high RPM accelerations.
Run five or six medium throttle (50%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear.
Run two or three hard throttle (WOT 100%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear.
Change the oil and filter. Replace the oil per the specification in step 1, and replace the filter with a new PF64 AC Delco oil
filter. Inspect the oil and the oil filter for any foreign particles to ensure that the engine is functioning properly.
Drive the next 500 miles (12 to 15 engine hours) under normal conditions. Do not run the engine at its maximum rated engine
speed. Also, do not expose the engine to extended periods of high load.
Change the oil and filter. Again, inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning
properly.
LT4 Engine Specifications:
Type: ........................................................................................................... ...... Gen V Small Block V8
Displacement:.............................................................................................. ...... 376 cubic inches (6.2 liters)
Bore x Stroke:................................................................................... ................. 4.065" (103.25 mm) X 3.622" (92 mm)
Compression:............................................................................................. ....... 10.0:1
Block:................................................................................ ................................. Cast aluminum, six bolt cross-bolted main caps
Cylinder Head:............................................................................................. ...... Cast aluminum rectangle port
Valve Diameter (Intake/Exhaust):................................................................ ...... 2.13"/1.59" (54mm/40.4mm)
Chamber Volume:....................................................................................... ........ 65.5cc
Crankshaft:.................................................................................................. ...... Forged steel, internally balanced
Connecting Rods:........................................................................................ ...... Forged powdered metal
Pistons:....................................................................................................... ........ Forged aluminum
Camshaft:.................................................................................................... ...... Hydraulic roller tappet
Lift: ............................................................................................................. ....... 0.502" intake, 0.561" exhaust
Duration:................................................................................ ............................188° intake, 223° exhaust @.050" tappet lift
Centerline:.................................................................................................. ........ 120° LSA
Rocker Arm Ratio:........................................................................................ ..... 1.81:1
LT4 Wet Sump Engine
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
19332622
IR 02JA18
PART NO.
DATE
17AU15 Initial Release - Rocko Parker
02JA18 Revision - Rocko Parker
10
SHEET
REVISION
35
OF
AUTH
ECA P5E00313
N/A