Re: Hose diagram assembly

Posted by HH56 On 2016/10/23 18:06:13

There were no detailed hose drawings prior to 55 but the 55 hose layout is virtually identical to 54. There is a small difference in tube locations on the front heater with the main difference being the water port locations on the engine.

In 54 the hot water outlet is the fitting on the top of the head so path starts there. The first stop is the thermostatic valve. The valve controls the water flow to the cores and to avoid intermittent clicking noises from the valve if it is partially open, the hose from the head needs to connect to the small curved side tube on the valve. Other connection from the valve goes to the front heater side tube. From the exit tube on the front heater it goes to the underseat heater. Out of the underseat heater and back to the return port on the water pump.

Here is the 55-6 dual heater drawing as well as a photo of a 51 front only heater showing the routing of the main hose from the head outlet and then back to the engine. With the underseat heater be sure to drape and strap the hoses similarly to the drawing to keep gravity from pulling on the hoses and kinking the hose to the underseat heater where it exits the front heater.

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