Genuine Four Seasons 74601 Heater Control Valve (NORS)
Restore the heating control of your classic Oldsmobile or Buick with this genuine Four Seasons 74601 Heater Control Valve. This is a vintage New Old Replacement Stock (NORS) part. It screws directly into the intake manifold or cylinder head and uses a vacuum signal to open coolant flow.
This part is designed for the Heater Supply position on specific 1966-1970 Oldsmobile and Buick vehicles equipped with manual A/C.
Key Features:
- Part Number: 74601 (Four Seasons)
- Interchange / Replaces OEM: GM 399679, GM 589541, Delco 15-553
- Position: Manifold to Heater Hose
- Specs: Vacuum Open / 1/2" NPT Thread / 5/8" Hose Barb
- Origin: Made in USA (Vintage Stock)
- Condition: NORS (New Old Replacement Stock)
Verified Vehicle Fitment:
| Make |
Model |
Year |
Engine |
Notes |
| Oldsmobile |
F85 / Cutlass / 98 / Toronado |
1966-1970 |
All |
Vacuum Heater Valve (Screw-In) |
| Buick |
Riviera / Skylark / Wildcat |
1967-1968 |
All |
Vacuum Heater Valve (Screw-In) |
Fits Years:
1966 1967 1968 1969 1970
Unbeatable Prices & Expectations
We scour the country to find the best deals on NOS and NORS parts so we can pass the savings on to you. Our prices are often significantly lower than major competitors.
Please Note: All vehicle fitment data is manually researched from vintage catalogs. While we strive for accuracy, historical data can sometimes be imperfect. Additionally, this part may fit other vehicle makes, models, and years not explicitly listed. We strongly encourage you to perform your own due diligence by comparing our provided photos and specifications to your original part to ensure proper fitment before purchasing.
