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Start-up and Break-in Procedures
1. After installing the engine, ensure the crankcase has been filled with 20w50 racing motor oil (non-synthetic) to the
recommended oil fill level on the dipstick. Also check and fill as required any other necessary fluids such as coolant,
power steering fluid, etc.
2. The engine should be primed with oil prior to starting. Follow the instructions enclosed with the tool. To prime the engine,
first remove the distributor to allow access to the oil pump drive shaft. Note the position of the distributor before removal.
Install the oil priming tool, part number 141-955 from our licensed partner www.factoryperformanceparts.com. Using
a 1/2" dill motor, rotate the engine oil priming tool clockwise for three minutes. While you are priming the engine, have
someone else rotate the crankshaft clockwise to supply oil throughout the engine and to all the bearing surfaces before
the engine is initially started. This is the sure way to get oil to the bearings before you start the engine for the first time.
Also, prime the engine if it sits for extended periods of time. Reinstall the distributor in the same orientation as it was
removed.
After the engine has been installed in the vehicle, recheck the oil level and add oil as required. It is also good
practice to always recheck the ignition timing after removal and reinstallation of the distributor. See step 4 or engine
specifications for the proper timing information.
3. Safety first. If the vehicle is on the ground, be sure the emergency brake is set, the wheels are chocked and the car
cannot fall into gear. Verify everything is installed properly and nothing was missed.
4. Start the engine and adjust the initial timing. Set the ignition timing to 15° before top dead center (BTDC) and the engine
idle to 950 RPM (ZZ572/620) or 1200 RPM (ZZ572/720R) with a timing light and the vacuum disconnected and plugged.
Rotate the distributor counterclockwise to advance the timing. Rotate the distributor clockwise to retard the timing. Leave
the vacuum advance disconnected.
5. 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.
6. Once the engine is warm, set the total advance timing to 36° at 4000 RPM.
7. 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.
8. Run five or six medium throttle (50%) accelerations to about 5000 RPM and back to idle (0% throttle) in gear.
9. Run two or three hard throttle (WOT 100%) accelerations to about 5000 RPM and back to idle (0% throttle) in gear.
10. Change the oil and filter. Replace with 20w50 racing motor oil (non synthetic) and a PF35L AC Delco oil filter. Inspect
the oil and the oil filter for any foreign particles to ensure that the engine is functioning properly.
11. Drive the next 500 miles under normal conditions or 12 to 15 engine hours. Do not run the engine at its maximum rated
engine speed. Also, do not expose the engine to extended periods of high load.
12. Change the oil and filter. Again, inspect the oil and oil filter for any foreign particles to ensure that the engine is
functioning properly.
13. Do not use synthetic oil for break-in. It would be suitable to use synthetic motor oil after the second recommended oil
change and mileage accumulation. In colder regions, a lower viscosity oil may be required for better flow characteristics.
ZZ572/620 and ZZ572/720R Component Information
Ignition System
The high energy ignition (HEI), part number 88961867, included with the ZZ572/620 is a self-contained ignition system
that includes a magnetic pick up, a module, coil, rotor, and cap. The HEI's large diameter cap minimizes arcing and cross-
firing between adjacent spark plug terminals. The cap's male terminals provide a reliable, positive connection for the
spark plug leads. However, the HEI's large diameter cap may interfere with other under hood components in vehicles not
originally equipped with HEI systems. Check for adequate clearance before installation. The HEI distributor incorporates
a hardened (melanized) drive gear that is compatible with a cast iron cam gear. Use of a non-hardened distributor gear
will result in excessive wear.
ZZ572/620 and ZZ572/720R Deluxe Specifications
TITLE
88962929
REV 16JA15
PART NO.
4
23
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