Chevrolet Performance LT1 Mode D'emploi page 7

The LT1 Gen-V engine feature oil-spray piston cooling, in which eight oil-spraying jets in the engine block drench the underside
of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil. The oil spray reduces piston
temperature, promoting extreme output and long-term durability. The extra layer of oil on the cylinder walls and wristpin also
dampens noise originating from the pistons.
Flexplate
The supplied flexplate is designed for a rear transmission. Chevrolet performance parts offers a standard flexplate (part
number 12620099) that maybe used (verify torque convertor bolt pattern). This flex plate has 6 evenly spaced (60 degrees
apart) attachment holes on a 281mm (11.063") diameter spacing, for the torque convertor.
NOTE: The flex plate does not use a locating pin for alignment and will not initially seat against the crankshaft flange, but
will be pulled onto the crankshaft by the engine flex plate bolts. This procedure requires a 3 stage tightening process.
1. Install the flex plate to the crankshaft. (figure 6)
2. Apply thread lock to the threads of the flex plate bolts.
3. Install the engine flex plate bolts.
4. Tighten the engine flex plate bolts (1–8) a first pass in sequence to 15 nm (11 lb. ft.).
5. Tighten the engine flex plate bolts (1–8) a second pass in sequence to 30 nm (22 lb. ft.).
6. Tighten the engine flex plate bolts (1–8) a final pass in sequence an additional 30 degrees.
Fig. 6
Pilot Bearing
You must install a pilot bearing in the rear of the crankshaft, if the engine will be used with a manual transmission. The pilot
bearing aligns the transmission input shaft with the crankshaft centerline. A worn or misaligned pilot bearing can cause shifting
problems and rapid clutch wear. There are two different Chevrolet pilot bearings for the LT1. 14061685 is for a long input shaft
transmission and 12557583 is for a short input shaft transmission. Verify fit prior to installing the transmission or damage will occur.
Performance Parts LT1 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.
19328729
PART NO.
DATE
03JN14 Initial Release - Rocko Parker
13MY16 Revision - Rocko Parker
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SHEET
REVISION
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AUTH
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