AG170 HEATER CONTROL VALVE — NOS — GM / UNIVERSAL — AC DELCO 15-6175 CROSS
type: Unknown Type
Vendor: CorvairFarmer
Description:
AG170 — HEATER CONTROL VALVE — SPECIFICATIONS & CROSS-REFERENCE
🔧 Technical Specifications
| Attribute | Details |
|---|---|
| Part Number | AG170 |
| Type | Inline Heater Control Valve |
| Function | Regulates coolant flow to heater core |
| Operation | Manual or vacuum-actuated (application dependent) |
| Inlet/Outlet Size | 5/8" hose (typical) |
| Material | Metal body with rubber seals |
| Temperature Range | –40°F to 175°F (–40°C to 79°C) |
| Mounting | Inline hose clamp or bracket mount |
| Status | NOS / aftermarket legacy part |
GM Applications
| Platform | Years | Models |
|---|---|---|
| C/K Trucks | 1970s–1980s | C10, C20, C30, K10, K20 |
| G‑Series Vans | 1970s–1980s | G10, G20, G30 |
| B‑Body (select) | 1970s | Impala, Caprice (dealer A/C) |
| A‑Body (retrofit) | 1970s | Malibu, Cutlass, LeMans (aftermarket HVAC) |
Typical GM engines involved: 250 I‑6, 292 I‑6, 305, 350, 400 small‑block.
UNIVERSAL / AFTERMARKET HVAC
| Application | Notes |
|---|---|
| Vintage Air | Inline coolant shutoff for compact heater circuits |
| RV HVAC Systems | Winnebago, Coachmen, Holiday Rambler |
| Dealer‑Installed A/C | GM, Ford, AMC dealer kits used this pattern |
| Custom / Retrofit Builds | Street rods, restorations, universal heater boxes |
🔁 Cross-Reference Equivalents
| Brand | Equivalent Part Number |
|---|---|
| AC Delco | 15-6175 |
| Murray | 277603 |
| Everco | H2391 |
| Other AG Boxes | AG803 (same Delco number), AG605/AG606 (adjacent family) |
🚗 Common Applications
-
Universal: Inline heater hose control for aftermarket HVAC installs
-
Retrofit: Used in custom or restoration setups where vacuum or manual coolant shutoff is needed
