heater hose restrictor?
#4
#5
Inline Tube sells the correct nipple with restrictor for $18. Note that the 1964-70 factory intakes use a smaller NPT than the 1971-up intakes. There is no telling what thread is used on aftermarket intakes.
#6
heater hose restrictor
no, there are no problems, I'm replacing the heater hoses and wanted to put it all back factory, I have all the correct hoses, and I seen reproduction from inline tube, heater hose fitting that goes in the back of the intake, in the ad it says with built in restrictor, so I didn't know if there suppose to be a restrictor in the heater hose or in the heater hose fitting on the back of the intake, or no restrictor at all. my heater works fine right now. I just wanted the correct way to put it back together. thanks! Brian
#7
The reason for the restrictor is to avoid overpressurizing the heater core, leading to leaks. On A/C cars, the heater control valve provides this restriction, but on heat-only cars the restriction is built into the nipple.
#9
FYI, the restriction is simply a smaller diameter hole (1/4" maybe?) in the much larger diameter hose fitting. You should be able to look at the inside of the fitting and see if it is restricted or not.
#10
Pretty sure the SBO Performer, along with the RPM has 3/4" NPT threads.
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