1. Exhaust & Emission Parts To Buy
  2. sku: 21696766426222813
  3. CADILLAC HR-3079

CADILLAC HR-3079 Nos Heat Riser Valve 3633079 69

fits make: Cadillac. year: 1968.

3633079 Genuine Replacement Part Hr-3079 Nos 1968 69 Cadillac Heat Riser Valve Hr 3079 #

( Manufacturer Part Number: HR-3079 ), ( Part Type: Heat Valve ), ( Ipn: 3633079 ), ( Vintage Part: Yes )

Review CADILLAC Genuine Replacement Part Nos 69 Heat Riser Valve Hr 3079 fits 1968

The **HR-3079 NOS (New Old Stock) Heat Riser Valve** from the **1968-1969 Cadillac** is a meticulously preserved, high-performance automotive component designed to regulate and optimize the flow of heated air within the vehicle s climate control system. This valve, originally manufactured for the iconic **Cadillac Eldorado, Seville, and other full-size models** from the legendary **1968 and 1969 model years**, plays a critical role in ensuring efficient heat distribution, particularly in the rear passenger compartments. Crafted from durable materials and maintained in its original condition, this NOS part retains the exact specifications and functionality of the factory-installed component, making it an ideal choice for restoration enthusiasts, classic car collectors, and mechanics seeking authenticity and reliability.

The **HR-3079 heat riser valve** is a **thermostatically controlled actuator** that adjusts the flow of warm air from the engine s heat exchanger (or "riser") to the vehicle s interior. In the original 1968-1969 Cadillacs, this valve was strategically positioned to direct heated air toward the rear seats, ensuring a comfortable environment for passengers while also preventing excessive heat buildup in the engine bay. Over time, these valves can degrade due to exposure to heat, moisture, and mechanical stress, leading to malfunctions such as inconsistent airflow, reduced heating efficiency, or complete failure. By sourcing a **NOS HR-3079**, owners can restore their Cadillac s climate control system to its factory-intended performance without compromising on quality or historical accuracy.

What sets this **NOS heat riser valve** apart is its **original, unmodified condition**, free from modern aftermarket alterations that could disrupt the vehicle s vintage character. The valve is fully functional, with all internal components including the **thermostatic bimetallic strip, linkage, and sealing mechanisms** intact and operational. This ensures seamless integration with the existing HVAC system, allowing for precise temperature regulation and optimal airflow distribution. Whether used in a **fully restored 1968 Eldorado or a carefully maintained 1969 Seville**, this valve contributes to the overall driving experience by maintaining a balanced and comfortable cabin environment, even in colder climates.

For collectors and restorers, the **HR-3079 NOS heat riser valve** represents a rare opportunity to preserve the mechanical integrity of a **true classic Cadillac**. Unlike modern replacements, which may use different materials or designs, this part ensures that the vehicle s climate control system operates exactly as it did in its original configuration. The valve s **durable construction** and **proven reliability** make it a long-lasting solution, reducing the need for frequent replacements and minimizing potential issues with compatibility. Additionally, its inclusion in a restoration project enhances the vehicle s authenticity, appealing to purists who prioritize historical accuracy over convenience.

In summary, the **HR-3079 NOS Heat Riser Valve for 1968-1969 Cadillac** is a **highly sought-after, factory-spec component** that plays a vital role in maintaining the performance and comfort of one of America s most legendary automobiles. Whether used in a showroom-ready classic or a daily-driven heirloom, this valve ensures that the Cadillac s legendary engineering including its advanced climate control system continues to function with precision and elegance. For those who appreciate the craftsmanship of a bygone era, this NOS part is an essential addition to any restoration or maintenance project, bridging the gap between history and modern functionality.

### **Pros and Cons of Buying a 1968-69 Cadillac Heat Riser Valve (HR-3079, NOS)**

#### **Pros:**

1. **New Old Stock (NOS) Quality** The valve is in original condition, meaning it has not been used or modified, ensuring it meets factory specifications. This reduces the risk of premature failure or compatibility issues.

2. **Reliability for Classic Engines** Cadillac s big-block engines (especially the 429 and 455) were known for durability, and the heat riser valve helps regulate coolant flow to critical areas like the cylinder heads. A properly functioning valve prevents overheating and engine damage.

3. **Ease of Installation** Since it s NOS, the valve should fit directly into a 1968-69 Cadillac without requiring machining or extensive modifications. It s a straightforward replacement part for a common failure point.

4. **Preservation of Originality** If you re restoring or maintaining a classic car, using NOS parts helps preserve its authenticity, which is valuable for enthusiasts and collectors.

5. **Long-Term Performance** A properly functioning heat riser valve ensures even coolant distribution, improving engine efficiency and longevity, especially in high-performance or modified engines.

6. **Availability of Supporting Parts** Since these parts were widely used, finding gaskets, seals, or related components (like thermostats or water pumps) is relatively easy.

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#### **Cons:**

1. **Cost** NOS parts are significantly more expensive than aftermarket or used replacements. The price reflects their original condition and scarcity, which may not be justified if the car is not a high-value restoration project.

2. **Limited Availability** Finding a NOS heat riser valve in stock may require searching multiple specialty suppliers, eBay, or collector markets, which can be time-consuming and may involve higher shipping costs.

3. **Potential for Overkill** If the car is a daily driver or a project that doesn t require strict authenticity, a NOS valve may not be necessary. A high-quality aftermarket or used replacement could suffice at a lower cost.

4. **Storage and Handling Risks** NOS parts are often stored in less-than-ideal conditions (e.g., long-term storage in boxes, exposure to humidity). While the valve itself may look pristine, there s a slight risk of internal corrosion or wear if it wasn t properly preserved.

5. **No Warranty or Return Options** Unlike aftermarket parts, NOS items typically come with no warranty or return policy. If the valve fails shortly after installation, you re responsible for the cost of replacement.

6. **Time-Consuming Sourcing** The search for NOS parts can take weeks or months, delaying a project. If you need the part urgently, aftermarket options may be more practical.

---

### **Conclusion:** Buying a NOS heat riser valve (HR-3079) for a 1968-69 Cadillac is a **highly justified investment** if:

- You are restoring or maintaining a high-value classic car where authenticity is a priority.

- You have the budget to accommodate the premium cost without compromising other essential repairs.

- You are willing to invest time in sourcing the part from reputable suppliers.

- The engine s reliability is critical, and you want to avoid potential coolant flow issues.

However, if:

- The car is a low-mileage daily driver or a budget project.

- You need the part quickly and can t wait for NOS availability.

- You re open to aftermarket alternatives that offer similar performance at a fraction of the cost.

...then a NOS valve may not be the most practical choice.

---

### **Recommendation:**

- **For Enthusiasts & Restorers:** **Proceed with the NOS valve.** The investment in quality and authenticity is worthwhile, especially if the car is a showpiece or a long-term project. Purchase from a trusted supplier (e.g., **Classic Parts Warehouse, eBay verified sellers, or specialty Cadillac suppliers**) to ensure genuineness.

- **For Budget Projects or Daily Drivers:** **Consider an aftermarket or used replacement.** Brands like **Melling, Carter, or even high-quality used NOS valves** (if available) can provide similar functionality at a lower cost. Verify compatibility and condition before purchasing.

- **For Urgent Repairs:** **Check local junkyards or classic car swap meets** for used valves. While not NOS, they can be a cost-effective solution if the car isn t a high-end restoration.

Ultimately, weigh the **value of authenticity** against **practicality and budget constraints** to make the best decision for your specific needs.

Details:

Make sure this item will fit your vehicle.

part #: hr3079 price

  • $140.00

specifications emissyste:

  • for makes: Cadillac
  • for years: 1968
  • mpn: Hr-3079
  • part type: Heat Valve
  • ipn: 3633079
  • vintage part: Yes

seller emissyste:

  • rating: 100.0%
  • city: Gastonia, North Carolina
  • # reviews: 75

offer emissyste:

  • availability: In Stock
  • options: Ship-to-home
  • quantity: 1
  • best offers: True
  • started: April 29, 2026
  • sold: 0

payments emissyste:

  • credit card: Mastercard
  • wallet: Paypal
  • other

general emissyste:

  • condition: New
  • Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts

returns emissyste:

  • time: 30 Days
  • paid by: Buyer
  • policy: Returns Accepted

shipping emissyste:

  • cost: $16.45
  • carrier: USPS
  • class: Standard
  • service: USPS Ground Advantage
  • type: Calculated
  • transit: 5-10 Days
for makes: cadillac, for years: 1968, part type: heat valve, vintage part: yes,
category: auto parts > car truck parts accessories > exhaust emission systems > exhaust emission parts, sku: 21696766426222813,
Cadillac HR-3079 Is Similar To:
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2 offers $140.00–$140.00 USD
  • New. Offer #1 priced at $140.00 + $16.45 shipping estimate = $156.45* total. Make sure this item will fit your vehicle.+$16.45 shipping
  • New other (see details). Offer #2 priced at $140.00 + $6.57 shipping estimate = $146.57* total. 1967 Eldorado.+$6.57 shipping

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