Group 02.01 12 Cylinder Head Picture pp103gm ref no part number * PP2825-12 Option No part name pp2825-12 req remarks Cylinder Head Cylinder Head 1 3683002 4026791 Head, Cylinder Seal, Valve Stem 1 24 2 3678611 Plug, Threaded 3 3 4 3678606 3679354 Seal, O Ring Plug, Threaded 1 6 5 6 3678603 3679122 Seal, O Ring Seal, O Ring 1 1 7 3681001 Spring, Valve 24 8 9 3679659 3681071 Insert, Valve Insert, Valve 12 12 10 3680883 Collet, Valve 48 11 12 3680884 3680318 Retainer, Valve Spring Guide, Valve Spring 24 24 13 14 3680656 4101454 Bracket, Lifting Valve, Exhaust 2 12 15 4059216 Valve, Intake 12 16 17 3683003 3015865 Head, Cylinder Plug, Expansion 1 7 18 19 3678536 3412352 Seal, Rectangular Ring Sleeve, Injector 6 6 20 4026657 Guide, Valve Stem 24 21 22 3680579 3680580 Bushing Bushing 7 4 23 24 3680581 3813247 Bushing Plug, Expansion 3 21 25 3910495 Screw, Hex Flange Head Cap 6 26 27 3911678 3678506 Dowel, Ring Screw, Fracture Resistant 2 22 28 29 3678804 4059350 Screw, Hex Flange Head Cap Gasket, Cylinder Head 4 1 30 3901846 Dowel, Pin Exhaust Exhaust Intake Inj. Sleeves Not Available M12 X 1.75 X 30.