CHRYSLER #SK 4318OE 318-360 INBOARD WITH ELECTRONIC IGNITION
(Does not apply for V-Drives)
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Ref.No.
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FreshWater Cooling Full Systems
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SK4318OE
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Up to 1985 - 318/360 Off-Engine mountedheat exchanger for engine with electronic ignition box behind distributor.(Completekit with hoses and all parts). IMPORTANT: If hot water heateror cabin heater is to be used, special heater tee #SK 3318 must be usedor manifold cracking may occur. See Below.This system willnot work on engines that have the dual impeller (dual pocket) raw waterpump (see ref. #
SHED55
). You must be using the single impeller (single pocket) rawwater pump (see ref. #
SHEG7B
) and the automotive type circulator pump on the front of your engine.
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SK3318
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Heater Tee. IMPORTANT:If hot water heater or cabin heater is to be used, special heater tee #SK3318 must be used or manifold cracking may occur.
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1. Disconnect battery. Drain engine block and manifolds.
2. Remove original thermostat housing and discard. Replace withhousing (supplied) placing thermostat under housing with pointed end up.
Using 1-1/2” x 2” hose, connect water filler assembly. Point inthe best direction to make connection to either 1-1/2” hose connectionon the heat exchanger.
3. Mount heat exchanger on engine stringers across the front of theengine or along the port side using the mounts supplied. Heat exchangerheight must be no higher than freshwater pump intake. Fitting should point up or no more than over at 45 degree.
4. Remove exhaust risers. Remove ¾” O.D. brass tubes inmanifolds and discard. Clean both surfaces thoroughly. Bolt backtogether using the new blank gasket (supplied). Use gasket cement,such as Permatex aviation type.
5. Screw fittings in lower rear of manifold with ¾”hose end pointing forward. Screw ½” x 90 degree x ¾” hosefittings into front covers or exhaust manifolds pointing inboard.
Using the tee with the 45 degree leg and the 1” x 2” hose, clamp tothe front of the intake manifold. Connect the ¾” hose ends of thetee to the lower rear of each manifold. Using the tee with air bleed plugand the 1” x 3” hose, clamp the hose to the hose connection on top of circulatingpump. Connect the ¾” hose ends to the front of the exhaustmanifolds. Note: some automobile conversions may have beenused to replace the engine. In this case, the hose sizes on pumpand intake manifold may be a different size. If so, contact Seakamp forfurther instructions.
6. Use 1-1/4” return fitting and 1-1/4” hose to connect seawater pumpto the heat exchanger’s1-1/4” hose fitting on heat exchanger’s seawater inlet.
Screw brass fittings ½” N.P.T. x 90 degree x ¾” hose intoexhaust risers at pipe thread closest to the blank gasket - low on theriser for proper cooling. Connect the hose ends to the tee, using¾” hose (supplied). Hose seawater to tee with 1” hose (supplied). Use a combination of elbows and flex hoses to connect fresh water fromthe pump to the heat exchanger.
7. Some hose may be longer than necessary. Cut to proper lengthto make a neat appearance.
Re-torque all hose clamps after first warm up.
Fill heat exchanger with water or 50/50 antifreeze solution. Startengine and run at fast idle (1000-12000 rpm) with filler cap off – observingwater level and add as needed.
It may be necessary to open 1/8” bleed plug on front tee to bleed air.
When thermostat opens and heat exchanger feels warm, top off coolantagain and replace fill cap.
Always watch temperature gauges closely on new installations.
IMPORTANT: If hot water heater or cabin heater is to be used, a specialheater tee #SK3318 must be used or manifold cracking may occur. Pleaseconsult Seakamp for technical information.