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Recommended Break-In Procedure:
Start-up is critical to ensure engine life. This procedure was written with the intent to provide a quick reference
and guideline to starting a new or rebuilt engine if a dyno is not available. lf you are using a dyno, refer to the dyno
operator's guidelines for start up and initial break in of the engine.
1. SAFETY FIRST! Make sure you have proper tools as well as eye protection. lf the car is on the ground, be sure
the wheels are chocked and the transmission is in neutral.
2. Be sure to check the oil level in the engine and prime the oil system.
3. Run the engine between 2,000 and 2,500 rpm, with no-load for the first 30 minutes.
4. Refer to the valve lash procedure (pg. 6) and lash valves.
5. Adjust the distributor timing to recommended specifications.
6. Adjust carburetor settings. Idle mixture screws, base idle, floats, etc.
7. After first 30 minutes of the engine running, re-set ignition timing and carb adjustments.
8. Drive the vehicle at varying speeds and loads for first 30 laps. Be sure not to use a lot of throttle or high rpm's.
9. Run 5-6 medium-throttle accelerations to about 4500 rpm followed by letting off in gear and coasting back down to
2000 rpm.
10. Run a couple of hard-throttle accelerations to about 5000 rpm followed by letting off in gear and coasting back down
to 2000 rpm.
11. Change the oil and filter with 15w50 full synthetic motor oil and ACDelco oil filter PF454 (PIN 25324052).
12. Drive the next 25 laps without high rpm's (below 5000 rpm), hard use, or extended periods of high loading.
13. Change the oil and filter again.
14. Your engine is now ready for racing!
TITLE
CT355 Circle Track Racing Engine (88958603) Specifications
88960548
IR 24MR14
PART NO.
7
32
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