300 heater hoses
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300 heater hoses
My 65 f100 heater hose from the thermostat has a tee that goes to the heater and to the engine block, close to the rear. My 84 F150 does not have the tee, and the engine block hole is plugged. Does anyone know why they are different? I want to change the 65 to be like the 84 so that the heater gets stronger flow and works better.
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I bought the 65 in 78 so it's possible that someone modified it, but everything about the truck seemed stock, so I have always assumed it came that way.
And now that I think about it, my original post makes no sense if the hose with the tee is the return, in which case removing the tee actually would reduce the flow through the heater if it affects it at all, and it's very possible that I switched the hose connections inadvertently over the years, so I'll probably keep the tee and make sure it's the return hose. If Ford actually made the change over the years, it could have simply been a cost reduction.
And now that I think about it, my original post makes no sense if the hose with the tee is the return, in which case removing the tee actually would reduce the flow through the heater if it affects it at all, and it's very possible that I switched the hose connections inadvertently over the years, so I'll probably keep the tee and make sure it's the return hose. If Ford actually made the change over the years, it could have simply been a cost reduction.
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Joined: Dec 2006
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From: Spokane, WA
As far as I know the drain hole in the block is just that, a drain hole. On the engines I have had I would remove the plug and install a petcock valve to drain the block when needed.. On those that I installed a tank heater I plumbed into that to draw from the block into the heater and back through the heater hose to the block. Either way, it made no difference in cab heater operation.
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