1&2 I think are for the Freshair heater hoses. 3. Is where the heater motor mounts through the firewall. 4. Is I think where a Ranco water heater valve . Hopefully an expert will be by to confirm. I don't have any of them on my truck. See attached picture for reference. Not Mine. Todd
Todd is correct. Here's a link to the installation instructions for the Fresh Air Heater.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Anyone know what size the fittings/hose barb are that connect the two hoses to the water pump. The two parts thread on and have a nipple end. Trying t o find the right size but dont know where to order that. It's a 216 engine, 1949 3600. Basically Figure 100, point A and C on the diagram. https://chevy.oldcarmanualproject.com/accessories/1951am/51aim38.htm
I would bet that the hose barbs on the engine are 5/8" hose. Some vehicles use 5/8" for one hose and 3/4" for the other, our older trucks are probably the same size for each hose.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
Yes. My 1950 uses the same hoses on both nipples. 5/8"
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
Both of the original nipples on my 216 are 5/8". You can get replacements HERE and possibly at your FLAPS.
Attached pic as proof
Last edited by klhansen; 03/14/202410:12 PM.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
