Colin's coolant crisis

Technical Area for all the problems you have in the garage
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Roger King
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Joined: Mon Mar 19, 2007 10:29 pm
Location: St Ives, Cambs

Colin's coolant crisis

Post by Roger King »

A brief word on heater plumbing, in the wake of Colin's problems with no heat appearing in his Cobra's heater circuit following an engine change.
One heater hose connects the water pump lower side connection (next to the bypass hose) to the heater matrix. The return hose is connected to the other heater pipe, traverses the top of the intake manifold and is connected to a threaded union drilled into the water passage at the front of the intake manifold very near the thermostat housing. DO NOT connect this to the rear of the intake manifold, where there is a similar tapped hole on some manifolds (Colin's is a Weiand), as the water passages at the rear of the manifold are blanked off by the casting and do not connect with the water jacket.
That is all,

Roger
Karl
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Joined: Sat Jun 30, 2007 8:43 pm
Location: Germany

Re: Colin's coolant crisis

Post by Karl »

Strange, my rear water passage is open and heater works!
Karl
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Roger King
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Joined: Mon Mar 19, 2007 10:29 pm
Location: St Ives, Cambs

Re: Colin's coolant crisis

Post by Roger King »

There may be variations with a different manifold. Stock Ford and Hipo are blocked off.
Karl
Posts: 766
Joined: Sat Jun 30, 2007 8:43 pm
Location: Germany

Re: Colin's coolant crisis

Post by Karl »

Yes Roger, I checked. I have a Professional products "Crosswind" medium hi-rise manifold, rear water passage and four corner water connection points.
Most intake manifolds seem to have water cross over only at the front.
Karl
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