Husqvarna TC 450 Workshop Manual page 183

ENGINE REASSEMBLY
Position the piston at TDC at the end of the compression stroke. Put the timing
gear in seat without rotating the crankshaft and mount the chain.
Mount the water pump (8 Nm-0,8 Kgm-5.8 ft/lb+LOCTITE 542), without rotating
the crankshaft, in order to obtain the perfect alignement of the twin chasing on
the gear to the spline on head face (see picture) (tighten water pump fastening
screws to 8 Nm-0,8 Kgm- 5.8 ft/lb+LOCTITE 542). Mount cylinder head-water
pump hose.
Part. N. 8000 H1344 (10-2009) H.35