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PERFORMER™ CYLINDER HEADS
®
For 1984 & Later Harley-Davidson
®
Evolution “Big Twin” Engines
Catalog #s 1602 & 1615
INSTALLATION INSTRUCTIONS
PLEASE study these instructions carefully before beginning this installation. Most installations can be accomplished with common tools and
procedures. However, you should be familiar with and comfortable working on your vehicle. If you do not feel comfortable performing this installation,
it is recommended to have the installation completed by a qualified m
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CHECKING VALVE-TO-VALVE CLEARANCE 1. Before installing heads on engine, remove valve springs, retainers 5. Repeat this process for the other valve. Note that intake and and locks from one head. Leave the valve seals on to hold the exhaust "Valve lift at Top Dead Center" dimensions are usually valves in position during the clearance check. different. 2. Use a 6" caliper to measure valve tip height from the valve spring 6. With both intake and exhaust valves open to the correct pocket. specificati
ページ3に含まれる内容の要旨
7. Remove the remaining fasteners (12, 13 and 14) holding the lower rocker arm cover (17) to the cylinder head (See Figure 1). 1. Push rod (2) 8. Remove the lower rocker cover and gaskets (15 and 16). 2. Spring cap retainer (2) 9. See Figure 4. Loosen each head bolt (1, 2) 1/8 turn following the 3. Upper push rod cover (2) cross pattern sequence shown in Figure 9. 4. Spring cap (2) 5. Spring (2) CAUTION 6. Spacer (2) Loosen head bolts gradually, in a cross pattern, to 7. O-ring (2) prevent disto
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INSTALLATION PROCEDURE HEAD GASKETS You must use the correct head gaskets to achieve a 9.5:1 compression ratio for best power. Thicker gaskets will lower compression and power, and thinner gaskets will raise compression higher than advisable for use with today's unleaded pump gasoline. 1. Use Edelbrock gasket set #1640 for 1984-91 or #1641 for 1992 and later engines. This set includes the proper thickness head gaskets (.045") and the special intake manifold gaskets required for these cylinder h
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3. Cylinder Head bolt torque sequence (See Figure 8): The procedure for tightening the head bolts is extremely critical; not only to prevent gasket leaks, but to prevent stud failure and heads and cylinders distortion. CAUTION Be sure you thoroughly clean and lubricate the cylinder head bolts before tightening to the correct torque. Friction because of dirt or grime will cause the torque wrench readings to be incorrect. Clean and lubricate the threads with engine oil and screw the bolts onto t
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CAUTION Do not turn engine over until push rods spin freely. Damage could occur to valves. NOTE: If the original push rods are being installed, be sure you do not turn them end for end from their original position because they have worn into their mating components. 4. Install the middle (4) and top (3) rocker arm covers, using new gaskets and new fiber seals. The fiber seals must be under the steel washers. Be sure the middle cover section is spaced evenly on all sides before tightening the cov
