ENGINE TOP END
3-5-39
◆
The proper valve tappet may be obtained by completing these steps:
1. Subtract the actual valve lash on the engine from the valve lash specifi cation (i.e. 0.27 mm – 0.20
mm) = 0.07 mm.
2. Divide the 3 digit tappet number by 100 (i.e. 520 / 100) = 5.2 mm.
3. Add the results of step 1 and step 2 (i.e. 0.07 mm + 5.2 mm) = 5.27 mm.
4. Multiply that answer by 100 to obtain the correct new tappet (i.e. 5.27 mm
×
100 = 527).
5. Refer to the table below to fi nd the closest available tappet size to the result from step 4 (i. e. 527
should be rounded to 528 since there is a 528 tappet).
Available Tappets
Part Number F01A20007- 001 002 003 004 005 006 007 008 009 010
3 digit number 480 482 484 486 488 490 492 494 496 498
Part Number F01A20007- 011 012 013 014 015 016 017 018 019 020
3 digit number 500 502 504 506 508 510 512 514 516 518
Part Number F01A20007- 021 022 023 024 025 026 027 028 029 030
3 digit number 520 522 524 526 528 530 532 534 536 538
Part Number F01A20007- 031 032 033 034 035 036 037 038 039 040
3 digit number 540 542 544 546 548 550 552 554 556 558
Part Number F01A20007- 041 042 043 044 045 046 047 048 049 050
3 digit number 560 562 564 566 568 570 572 574 576 578
IMPORTANT
The Valve Lash Specifi cation and Measured Valve lash must be calculated in millimeters (mm), A 480
tappet means the thickness of the tappet is 4.80 mm.
Valve Lash - Tappet Selection
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