CADHOWDY
Registered User
So I have an idea for a better cold start that could apply to other applications as well as a 6.9 and 7.3 IDI. Block heaters are generally a must if cold starts are below the -10C (14F) or so mark and there may be some opinion on whether it is better to have your heat in the cooling system or to have something to heat the oil in the oil pan. Typically if a guy were to try to use both heaters you end up tripping the breaker.
The 6.9/7.3 block was built with a number of extra ports in the cooling system for various applications and obviously not all are used for the ford pickup trucks. What I'm trying to show here is what if a guy were to weld in a length of pipe with pipe thread on either end into a bottom corner in the oil pan (which ever clears the pickup tube) and then plumb each side up to the next coolant port on the side of the block. Looking at the coolant flow diagram I can't see how the new cross over would affect flow in the block for proper cooling. My thought is that, through convection, that leg of hose and pipe running through the oil will heat the oil. Therefore a guy only needs his block heater to heat both fluids. What are the thoughts on such a set up?
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The 6.9/7.3 block was built with a number of extra ports in the cooling system for various applications and obviously not all are used for the ford pickup trucks. What I'm trying to show here is what if a guy were to weld in a length of pipe with pipe thread on either end into a bottom corner in the oil pan (which ever clears the pickup tube) and then plumb each side up to the next coolant port on the side of the block. Looking at the coolant flow diagram I can't see how the new cross over would affect flow in the block for proper cooling. My thought is that, through convection, that leg of hose and pipe running through the oil will heat the oil. Therefore a guy only needs his block heater to heat both fluids. What are the thoughts on such a set up?