Where to buy water pump housing attachments for 73 400 engine?

[Lordofthepings777]

As title states, I’m looking for the attachments on the water pump housing for my 400 mopar rebuild. They were damaged in the rebuild process, and I’m looking to buy new ones or possibly used if there’s no other options.

i have found a replacement temp sender/sensor, but the temperature operated vacuum bypass valve isn’t showing up on any websites. Not to mention the 2 nipples that go into the cast I’m unsure where to source as well. If anybody has any ideas or these parts, please let me know. I can include some photos to show what they are and why I need them lol. Thank you.

 

[ceebuddy]

Perhaps these are the right heater hose nipples?

 

[CBODY67]

The heater hose nipples are NOT specific to Chrysler products, although the ones Chrysler used looked like those you have. Check the HELP! rack at the auto supply store.

The "Thermo Vacuum Switch" will not be listed in the cooling system listings, but in the" Emissions Control" listings. It keeps something from operating while the engine is warming up, but allows something to work (as EGR) when the engine coolant is above a certain temperature. Should be a part number cast into one side of it, vertically.

CBODY67

 

[Toolmanmike]

Heater Hose Nipples 1970-up Big Block/Hemi, Heater Hose Nipples, 101-HNK2 Reproduction, NOS and Used Mopar Muscle Car Parts

www.megapartsusa.com

 

[Vaanth]

As title states, I’m looking for the attachments on the water pump housing for my 400 mopar rebuild. They were damaged in the rebuild process, and I’m looking to buy new ones or possibly used if there’s no other options.

i have found a replacement temp sender/sensor, but the temperature operated vacuum bypass valve isn’t showing up on any websites. Not to mention the 2 nipples that go into the cast I’m unsure where to source as well. If anybody has any ideas or these parts, please let me know. I can include some photos to show what they are and why I need them lol. Thank you.

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The temperature operated vacuum by-pass valve, or more formally Thermostatic Ignition Control (TIC) valve, as the service manual page explains is used to reduce the possibility of engine overheating. It operates by switching from carburetor ported vacuum to full manifold vacuum if coolant temperature reaches 225 degrees Fahrenheit. The full manifold vacuum is routed to the distributor vacuum advance, advancing the timing and kicking the idle speed up, subsequently speeding the water pump and coolant flow.

The TIC is classified under emissions components, although it does not perform a direct emission function itself, plus it is plumbed into the Orifice Spark Advance Control (OSAC) vacuum circuit. OSAC connects in the vacuum path from the carburetor ported vacuum to the distributor vacuum advance canister. When the TIC valve activates, in addition to redirecting the vacuum source to the distributor vacuum canister, it bypasses the OSAC valve.

The Chrysler number for the original TIC valve in a 1973 400 is 3780126. This valve was used in several applications and for several years. The same type of valve was also used in AMC and Ford applications.

Following are some aftermarket replacements:
- Carter PV16
- Standard Motor Products PVS14
- Tomco 13312
- McQuay Norris/Dole DPV-18
- Borg Warner EC-970
- Wells E-900
- Echlin 2-1000 or 21000 (also NAPA)
- Kem 133-118


The other postings have pointed out heater hose nipple sources, but here are a couple more:

- https://521restorations.com/Heater-Hose-Nipple-Kit-1970-Later-Big-Block-Hemi

- HEATER HOSE NIPPLE KIT 70 AND LATER BIG BLOCK & HEMI

 

[CBODY67]

The TIC valve was also part of a comprehensive TSB to address a/c hoses blowing up due to a recycling of engine heat back into the a/c condenser from under the car for the 1972 Chryslers. Our 1972 Newport Royal came under that TSB, so it received the TIC valve plus all of the die-cut mastic rubber shelds/baffles needed so that all of the air the a/c condenser and radiator saw came exclusively through the front grille opening. At the time, I was impressed with the way it was done! Worst part of the TSB was draining the coolant to put the new thermostat housing on.

Enjoy!
CBODY67

 

[Lordofthepings777]

The temperature operated vacuum by-pass valve, or more formally Thermostatic Ignition Control (TIC) valve, as the service manual page explains is used to reduce the possibility of engine overheating. It operates by switching from carburetor ported vacuum to full manifold vacuum if coolant temperature reaches 225 degrees Fahrenheit. The full manifold vacuum is routed to the distributor vacuum advance, advancing the timing and kicking the idle speed up, subsequently speeding the water pump and coolant flow.

The TIC is classified under emissions components, although it does not perform a direct emission function itself, plus it is plumbed into the Orifice Spark Advance Control (OSAC) vacuum circuit. OSAC connects in the vacuum path from the carburetor ported vacuum to the distributor vacuum advance canister. When the TIC valve activates, in addition to redirecting the vacuum source to the distributor vacuum canister, it bypasses the OSAC valve.

The Chrysler number for the original TIC valve in a 1973 400 is 3780126. This valve was used in several applications and for several years. The same type of valve was also used in AMC and Ford applications.

Following are some aftermarket replacements:
- Carter PV16
- Standard Motor Products PVS14
- Tomco 13312
- McQuay Norris/Dole DPV-18
- Borg Warner EC-970
- Wells E-900
- Echlin 2-1000 or 21000 (also NAPA)
- Kem 133-118


The other postings have pointed out heater hose nipple sources, but here are a couple more:

- https://521restorations.com/Heater-Hose-Nipple-Kit-1970-Later-Big-Block-Hemi

- HEATER HOSE NIPPLE KIT 70 AND LATER BIG BLOCK & HEMI

Thank you! This explains everything I needed!