THE SHOP

October '17

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12 PRECISION ENGINE OCTOBER 2017 PRECISION ENGINE Tighten the 6mm screw to about 90-100 inch-pounds. Verify to make sure that the fitting block is fully flush to the flat milled mating surface on the cylinder head. Simply tightening the screw further may not work. The short shoulder at the O-ring must be fully engaged with the bottom of the block, flush with the mating surface. At the right front TFS fitting: • Connect a male/male/female T-fitting, with the female end attached to the TFS fitting. • Connect a 90-degree hose end onto the vertical male of the T-fitting. • Connect a straight hose end onto the horizontal male of the T-fitting. At the right rear TFS fitting: • Connect a male/male/female T-fitting, with the female end attached to the TFS fitting. • Connect a 90-degree hose end onto the vertical male of the T-fitting. • Connect a straight hose end onto the horizontal male of the T-fitting. At the left rear TFS fitting: • Connect a 90-degree hose end to the TFS fitting's –4 male nipple. At the left front TFS fitting: • Connect a 90-degree female/female coupler to the TFS fitting. • Connect a male/male/male T-fitting to the female coupler. • Connect a straight hose end to the hori- zontal of the male T-fitting. • Connect a 90-degree hose end to the vertical male of the T-fitting. This hose end will allow you to feed a –4 hose from this 90-degree hose end to your water neck or radiator neck. In this particular build, we ran the hose from the left front 90-degree hose end to our Moroso water neck. The water neck housing features a 1/4-inch NPT threaded hole, where we installed a 90-degree –4 AN to 1/4-inch NPT fitting, which accepts a straight –4 hose end. HOSE LENGTHS Once you have mocked up all fittings and hose ends, you can measure for individual hose lengths. Regardless of your specific engine application, as long as you have LS heads, the right-front-to-right-rear hose and the front left-to-right hose lengths can duplicate our example. The only hose length variables may include the rear left-to-right crossover hose and the final outlet hose that runs from the left front to your point of termination. In our example, the hose length running from the left front to the Moroso water The last run in the system is a hose that connects to a return to the radiator, either at the upper radiator neck or to a remote water neck as shown here. Obtaining a clean, square cut is easy using a hose cutter such as Summit's SUM-900040. The dedicated –AN hose cutter slices through braided hose like butter. Remove the hex collar from the hose end. Using this Fragola –4 straight hose end as an example, note the barbed nipple that will engage into the hose. Inserting an AN hose into the hose end hex collar can be a chore for the first-time installer. Using Koul Tools' AN hose end assembly tool makes this a breeze. Separate the two halves of the tool, and place the hose end's hex collar into the tool cavity, with the hose entry end of the hex facing the tool's funnel end, and snap the tool halves back together. Place the tool into a bench vise, securing the tool halves together. Insert the hose using a rotating motion. The funnel entrance guides the hose into the hose end hex collar. Cylinder Head Steam Plumbing

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