olsonm Posted May 11, 2019 Report Share Posted May 11, 2019 I have just recently installed a Mopar 61 heater in my 1949 Dodge B-1-B truck and I need to know which inlets on the heater my hoses connect to. Quote Link to comment Share on other sites More sharing options...
olsonm Posted May 11, 2019 Author Report Share Posted May 11, 2019 I have just installed a Model 61 heater in my 1949 Dodge B-1-B truck and I need to know which inlets the heater hoses are connected to? Quote Link to comment Share on other sites More sharing options...
John-T-53 Posted May 11, 2019 Report Share Posted May 11, 2019 (edited) Welcome to the forum. The inlet is the top pipe on the heater core, which connects to the valve at the back of the cylinder head, and should be marked with cast letters "heater" on the head. The outlet pipe is on the bottom, which connects to the nipple on top of the water pump. Edited May 11, 2019 by John-T-53 Quote Link to comment Share on other sites More sharing options...
Merle Coggins Posted May 11, 2019 Report Share Posted May 11, 2019 I always connect heater cores with the inlet at the bottom so that any air is naturally purged up and out with the return line. Quote Link to comment Share on other sites More sharing options...
olsonm Posted May 11, 2019 Author Report Share Posted May 11, 2019 Thanks for your help, I appreciate it. I have a temperature cable hanging lose on the inside of the firewall, so I assume I should be looking for an engine mounted cable operated heater valve for the back of the cylinder head. Any thoughts? Quote Link to comment Share on other sites More sharing options...
rekbender Posted May 11, 2019 Report Share Posted May 11, 2019 The first picture is the cable operated valve that was on my B4C. The second is the valve on my P18. Seems to be a fairly common valve . I've seen them NOS on eBay, but expensive. I may have an old used one if you can't find a new valve. Quote Link to comment Share on other sites More sharing options...
greg g Posted May 11, 2019 Report Share Posted May 11, 2019 On cars there is a tap in the rear pass corner of the head for feed, and a return on top of the water pump. An elbow in a flat piece bolted on with two bolts. Quote Link to comment Share on other sites More sharing options...
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