SERVICE MANUAL CYLINDER HEAD & VALVES Section 3 CHECKING  ENGINE GEAR  TRAIN TIMING WITHOUT REMOVING FRONT COVER AND/OR ENGINE TEAR DOWN. METHOD ONE - USING A FEELER GAUGE 1. Adjust  the  No.    1  intake  valve  with  the  No.    1 piston set at TDC (Top Dead Center) compression stroke as follows: ENGINE GEAR TRAIN TIMING SPECIFICATION CHART No.  1 Intake Valve Setting Engine With No.  1 Piston @ TDC Engine Serial No. (Compression) [mm (in.)] D-312 2504 and below 0.40 (0.016) D-312 2505 and above 0.50 (0.020) D-360 and All DT-360 Engines D-414 126953 and below 0.60 (0.024) D-414 126954 and above 0.74 (0.029)’ DT-414 and 149604 and below 0.60 (0.024) DT-414B DT-414B 149605 and above 0.74 (0.029)* D-436 83591 and below 0.60 (0.024) D-436 83592 and above 0.74 (0.029)* DT-436 and 114240 and below 0.60 (0.024) DT-436B DT-436B 114241 and above 0.74 (0.029)* D-466 54340 and below 0.60 (0.024) D-466 54341 and above 0.74 (0.029)* DT-466, DT- 466B and 110913 and below 0.60 (0.024) DTI-466B DT-466B and 110914 and above 0.74 (0.029)* DTI-466B DT-466C and 400 001 and above 0.74 (0.029)* DTI-466C *New valve timing adjustment specification for engines equipped with revised camshaft. CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 31