1. Engine Cooling Components Deals
  2. sku: 19813296606007604
  3. HONDA PRELUDE

HONDA 348.HO1K99 Thermostat Housing Cylinder 2.2L

fits model: Prelude. make: Honda. year: 1997–2001.

348.ho1k99 Honda Prelude Thermostat Housing 2.2l 4 Cylinder Fits 1997-2001 97 98 99 00 01

( Part Type: Thermostat Housing Cylinder ), ( Conditions Options: Coupe, Bb6, Natasp ), ( Genuine Oem: Yes ), ( Ipn: 348.ho1k99 ), ( Year: 1999 ), ( Manufacturer Warranty: 60 Day )

Review HONDA Thermostat Housing 2.2l Cylinder fits PRELUDE 1997–2001

The **Honda 348.HO1K99 Thermostat Housing (2.2L Cylinder, 1997 2001 Models)** is a precision-engineered component designed to regulate engine coolant flow within the **1997 2001 Honda Prelude (97 98 01)** with the **2.2L VTEC engine (HO1K99)**. This critical part serves as the gateway for coolant circulation between the engine block and radiator, ensuring optimal operating temperatures while preventing overheating and engine wear. Crafted from high-quality **cast aluminum**, the thermostat housing is built to withstand the thermal stresses of high-performance driving, offering durability and resistance to corrosion essential for maintaining long-term reliability in both daily commuting and spirited driving conditions.

The **HO1K99 thermostat housing** features a **threaded mounting design** compatible with the Prelude s engine bay layout, ensuring a secure and leak-free installation. Its **integrated thermostat bore** accommodates the stock or aftermarket thermostat, allowing for precise temperature regulation through the expansion and contraction of the thermostat s wax-filled core. The housing also incorporates **coolant inlet and outlet ports**, precisely aligned to match the Prelude s cooling system plumbing, including the **radiator, water pump, and heater core**. For added convenience, the design includes a **removable cover**, simplifying maintenance tasks such as thermostat replacement or coolant flushes without requiring extensive disassembly.

This component is a **direct-fit replacement**, meaning it is engineered to match the exact specifications of the original equipment manufacturer (OEM), including **thread pitch, bolt pattern, and dimensional tolerances**. Whether addressing a **leaking housing, cracked casting, or a failed thermostat**, this aftermarket part ensures compatibility with the **1997 2001 Prelude s cooling system** while adhering to Honda s engineering standards. Ideal for both **restoration projects and routine maintenance**, the **348.HO1K99 thermostat housing** provides a reliable solution for drivers seeking to restore their vehicle s performance and longevity without compromising on quality.

### Pros and Cons of Buying a Honda 348 HO1K99 Prelude Thermostat Housing (2.2L, 1997 2001)

#### **Pros:**

1. **Reliability and Durability** Honda s 2.2L B22 engine (used in the Prelude HO1K99) is known for its robust construction and longevity, especially when maintained properly. The thermostat housing is a critical component that, when genuine or high-quality, ensures proper coolant flow and engine temperature regulation.

2. **Easy to Install** The thermostat housing is a straightforward bolt-on replacement. Most mechanics or even experienced DIYers can install it without specialized tools, though proper sealing and torque specifications must be followed to avoid leaks.

3. **Prevents Overheating** A faulty thermostat housing or thermostat can lead to overheating, which damages the engine over time. Replacing it ensures the engine stays within optimal operating temperatures, improving performance and extending engine life.

4. **Compatibility** The HO1K99 Prelude (1997 2001) shares many parts with other Honda models (e.g., Accord, Civic, Odyssey), so finding a replacement is relatively easy. Genuine Honda parts or reputable aftermarket brands (like ACDelco, Fram, or Mann-Filter) are widely available.

5. **Cost-Effective** Compared to major engine repairs (e.g., head gasket failure, cylinder head replacement), replacing a thermostat housing is a relatively inexpensive fix. Prices for a genuine or high-quality aftermarket part typically range from $30 $80, plus labor if professional installation is needed.

6. **Preventative Maintenance** Replacing the thermostat housing as part of routine maintenance can catch potential issues early, avoiding more costly repairs down the line. It s often recommended during coolant system flushes or every 60,000 100,000 miles, depending on conditions.

7. **Improved Performance** A properly functioning thermostat housing ensures the engine reaches operating temperature quickly, which can improve fuel efficiency, throttle response, and overall drivability.

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#### **Cons:**

1. **Potential for Counterfeit Parts** The aftermarket for Honda parts can be flooded with low-quality or counterfeit items, especially on eBay or less reputable sellers. Cheap knockoffs may fail prematurely or leak, leading to further damage. Always verify the part s authenticity (e.g., check for Honda logos, purchase from trusted dealers, or use verified sellers).

2. **Risk of Improper Installation** If not installed correctly, the thermostat housing can leak coolant, leading to overheating or coolant loss. This requires careful sealing (using the correct gasket or sealant) and proper torque on bolts. Over-tightening can damage the housing or warping the engine block.

3. **Thermostat Failure Risk** Even with a new housing, the thermostat itself can fail (e.g., sticking open or closed). If the original thermostat is old or damaged, it should be replaced simultaneously to avoid repeating the issue. Some kits include a new thermostat, but others require purchasing it separately.

4. **Coolant System Contamination** If the old housing was leaking, it may have introduced contaminants into the coolant. A full coolant flush is recommended after replacement to ensure the system is clean and free of debris.

5. **Labor Costs** While the part itself is affordable, labor costs can add up, especially if the work requires draining the coolant system or accessing hard-to-reach areas (e.g., in some Prelude models). Expect to pay $100 $200 for labor, depending on the shop s rates.

6. **Age of the Engine** If the Prelude has high mileage (e.g., 200,000 miles) or signs of wear (e.g., oil leaks, exhaust issues), replacing just the thermostat housing may not address underlying problems. A full diagnostic is wise to ensure the engine is otherwise healthy.

7. **Limited Lifespan of Gaskets** Even with a new housing, the gasket or sealant may degrade over time, leading to leaks. Some owners report needing to reapply sealant or replace the gasket after a few years, depending on driving conditions.

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### **Conclusion:**

Replacing the thermostat housing on a 1997 2001 Honda Prelude HO1K99 is a **highly recommended and cost-effective** maintenance task. The benefits preventing overheating, improving engine longevity, and ensuring reliable performance far outweigh the risks, provided the part is genuine or high-quality and installed correctly. The main drawbacks (counterfeit parts, installation errors, or thermostat failure) can be mitigated by purchasing from trusted sources, following proper installation procedures, and addressing related components (like the thermostat) simultaneously.

If the Prelude is otherwise in good condition, this repair is a **prioritize** for owners experiencing overheating, coolant leaks, or inconsistent engine temperatures. For vehicles with high mileage or other known issues, it s best to pair this repair with a full diagnostic to avoid overlooking larger problems.

### **Recommendation:**

1. **Purchase a Genuine or High-Quality Aftermarket Part** Opt for a Honda OEM part (e.g., Honda 348 HO1K99 thermostat housing) or a reputable brand like **ACDelco, Fram, or Mann-Filter**. Avoid suspiciously cheap parts from unknown sellers.

2. **Replace the Thermostat** If the old thermostat is not being replaced, buy a new one (e.g., **Honda 348 HO1K99 thermostat**) to ensure the fix is complete.

3. **Use the Correct Gasket or Sealant** Some kits include a gasket; if not, use **Honda-specific gasket material** or a high-quality sealant like **Permatex 24000** to prevent leaks.

4. **Drain and Flush the Coolant** Replace old coolant and flush the system to remove contaminants, especially if the old housing leaked.

5. **Follow Installation Guidelines** Torque bolts to Honda s specifications (typically 20 25 ft-lbs for the housing) and ensure the gasket is properly seated.

6. **Monitor for Leaks** After installation, check for coolant leaks around the housing and monitor the engine temperature gauge for proper operation.

7. **Consider Professional Installation** If unsure about DIY work, have a trusted mechanic perform the replacement to avoid costly mistakes.

**Final Verdict:** This is a **necessary and worthwhile repair** for maintaining engine health in your 1997 2001 Prelude. With the right part and careful installation, it will extend the life of your engine and prevent overheating-related damage.

Details:

Warranty covers the base component and none of other attached parts. Stock #: 253858. These extra attached parts are not covered by any warranty. Video: Go to YouTube and search for: Playground PAR 253858 Part Detail: Placement.

Major components are stamped and may have heat sensitive tabs attached to indicated overheating that would void warranty. Parts are not covered for external fluid leaks. Honda Prelude Thermostat Housing 2.2L 4 Cylinder Fits 1997 2001 97 9801: Review photos this is your actual part. Thermostat Housing Broken Connector.

Many electronic modules and components require programming. Miles: 2010 - N/A or Unknown. Donor Vehicle: model: PRELUDE.

specifications ocoosys:

  • for models: Prelude
  • for makes: Honda
  • for years: 1997-2001
  • part type: Thermostat Housing Cylinder
  • conditions options: Coupe, Bb6, Natasp
  • genuine oem: Yes
  • ipn: 348.ho1k99
  • year: 1999
  • manufacturer warranty: 60 Day

general ocoosys:

  • condition: Used
  • Car Truck Parts Accessories > Engine Cooling Components > Thermostats Housings

offer ocoosys:

  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • started: February 16, 2026
  • quantity: 1
  • best offers: True

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  • class: Standard
  • transit: 3-5 Days
  • type: Fixed

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  • # reviews: 10364
  • rating: 99.3%
  • city: Port Washington, Wisconsin

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  • policy: Returns Accepted
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for models: prelude, for makes: honda, for years: 1997-2001, part type: thermostat housing cylinder, conditions options: coupe, bb6, natasp, genuine oem: yes, year: 1999, manufacturer warranty: 60 day,
manufacturer: honda, category: auto parts > car truck parts accessories > engine cooling components > thermostats housings, sku: 19813296606007604,
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1 offer $85.37 USD
  • Used. Offer #1 priced at $85.37 + $0.00 shipping estimate = $85.37* total. These extra attached parts are not covered by any warranty. Model: PRELUDE.FREE SHIPPING

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