1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13387623754323722
  3. TRW P1136-003

TRW P1136-003 Wrist Pins Ci Cylinder 6-OVERSIZE 261

fits make: Chevrolet. year: 1954–1962.

P1136 Trw 003 6-oversize Wrist Pins 1954-1962 Chevrolet Truck 261 Ci 6 Cylinder

( Brand: Trw ), ( Manufacturer Part Number: P1136-003 ), ( Type: Wrist Pins ), ( Items Included: 6 Oversize Wrist Pins ), ( Material: Cast Iron ), ( Vintage Part: Yes ), ( Country Of Origin: United States ), ( Performance Part: No )

Review TRW 003 6-oversize Wrist Pins Chevrolet Truck 261 Ci Cylinder fits 1954–1962

The **TRW P1136-003 6-oversize wrist pins** are a precision-engineered, high-performance replacement part designed specifically for the iconic **1954 1962 Chevrolet 261 cubic inch inline-six engine**, a legendary powerplant renowned for its durability and classic muscle car heritage. These wrist pins are crafted from **chrome-molybdenum steel**, a material chosen for its exceptional strength, wear resistance, and ability to withstand the extreme stresses of high-performance applications. Unlike standard wrist pins, these **oversize (0.030" above nominal size) pins** provide an upgraded fit within the piston s wrist pin bores, reducing clearance and minimizing lateral movement, which in turn reduces piston slap, improves piston-to-wall contact, and enhances overall engine efficiency. The pins feature a **smooth, polished finish** to ensure easy installation and long-term reliability, while their **interference fit** design helps maintain proper piston alignment, reducing the risk of binding or premature wear critical factors for engines running under heavy loads or modified conditions. Whether restoring a vintage Chevrolet Bel Air, Nomad, or Corvette, or pushing a modern high-performance build to its limits, these TRW wrist pins deliver the strength and precision needed to keep the 261 s classic six-cylinder running with the smoothness and reliability it was originally designed for. Built to exacting standards, they are a trusted upgrade for both restoration projects and high-mileage performance applications, ensuring that every cylinder operates with the efficiency and longevity expected from one of Chevrolet s most enduring engines.

### Pros and Cons of Buying TRW Part Number P1136-003 (6-Oversize Wrist Pins for 1954 1962 Chevrolet 261 ci Cylinder)

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#### **Pros:**

1. **Compatibility and Fit:** This part is specifically designed for the 261 ci Chevrolet engine (1954 1962 models), ensuring a proper fit without modification. Oversize wrist pins are often used to address wear in older engines, improving piston-to-wrist pin clearance and reducing slop.

2. **Performance Benefits:** Oversize pins can reduce piston slap, improve engine smoothness, and enhance compression by minimizing internal clearance. This is particularly useful for high-mileage or modified engines where wear has become an issue.

3. **Durability:** TRW is a reputable manufacturer known for producing high-quality aftermarket automotive parts. Their oversize wrist pins are typically made from hardened steel, offering better wear resistance compared to stock or worn-out components.

4. **Ease of Installation:** These pins are designed for straightforward installation, though they may require careful handling to avoid cross-threading or damage to the piston. The part comes pre-packaged, reducing the risk of mixing up sizes or materials.

5. **Cost-Effective Upgrade:** Compared to a full engine rebuild or piston replacement, oversize wrist pins are a relatively inexpensive solution to address wear-related issues. They extend the life of existing pistons and rings, delaying more costly repairs.

6. **Availability:** As a widely used part, TRW P1136-003 is likely available through multiple suppliers, including online retailers, auto parts stores, and specialty engine rebuild shops. This ensures easier access for repairs.

7. **Compatibility with Modifications:** If you ve modified your engine (e.g., forced induction, high-performance camshafts), oversize pins can help mitigate stress on the piston-to-wrist pin interface, reducing the risk of failure under increased loads.

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#### **Cons:**

1. **Limited Longevity:** While oversize pins reduce immediate wear, they are not a permanent fix. Over time, the pistons themselves may wear to the point where they cannot accommodate the larger pins, necessitating further replacement (e.g., pistons, rings, or wrist pins again).

2. **Installation Complexity:** Although the process is manageable for experienced DIYers, installing oversize wrist pins requires precision. Improper installation such as incorrect torque on the pin retainers or misalignment can lead to binding, reduced performance, or even catastrophic failure. This may require specialized tools (e.g., piston ring compressors, pin drivers) and patience.

3. **Potential for Over-Torquing:** If the pin retainers (circlips or snap rings) are tightened excessively, they can damage the piston grooves or cause the pins to bind. Under-torquing, on the other hand, may allow the pins to rattle, negating the benefits of the upgrade.

4. **Cost of Additional Components:** If the pistons or rings are worn beyond a certain point, you may need to replace them alongside the wrist pins. This adds to the overall cost and labor time, making the project more expensive than initially anticipated.

5. **Warranty or Guarantee Limitations:** Some aftermarket parts, including TRW components, may not come with a long-term warranty or may void manufacturer warranties if installed incorrectly. Always check the warranty terms before purchasing.

6. **Skill Dependency:** This repair is best suited for those with mechanical experience or access to guidance (e.g., repair manuals, videos, or a mechanic). For beginners, the risk of mistakes such as cross-threading the pin holes or damaging the piston could lead to costly errors.

7. **Alternative Solutions Exist:** Depending on the severity of wear, other solutions such as replacing pistons and rings, using piston coatings, or installing a full set of oversize pistons might be more cost-effective in the long run. A professional inspection can help determine the best approach.

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#### **Conclusion:**

TRW P1136-003 oversize wrist pins are a practical and cost-effective solution for addressing wear in a 1954 1962 Chevrolet 261 ci engine, particularly if the pistons are still in decent condition. They offer noticeable improvements in engine smoothness and durability with minimal downtime. However, they are not a permanent fix and require careful installation to avoid complications. The decision to use them should be based on the engine s overall condition, your mechanical skill level, and whether you re willing to address potential follow-up issues (e.g., piston wear) in the future.

If you re unsure about the engine s condition or lack experience with piston/wrist pin replacement, consulting a professional mechanic for an inspection or installation is advisable. For those comfortable with the process, these pins are a solid choice to extend the life of an older engine.

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#### **Recommendation:**

- **Proceed with Purchase:** If your engine exhibits piston slap, excessive wrist pin clearance, or you re performing a rebuild and want to future-proof the engine, the TRW P1136-003 pins are a worthwhile upgrade.

- **Pair with Other Maintenance:** Consider replacing piston rings or checking for rod bearing wear during the same service to maximize the engine s lifespan.

- **Seek Professional Help if Needed:** If you re not confident in your ability to install the pins correctly, hire a mechanic to ensure proper fitment and torque.

- **Document the Work:** Keep records of the installation, including torque specs and any modifications, to reference in the future.

Ultimately, this part is a smart intermediate step for restoring performance to a worn 261 ci engine, but it should be part of a broader maintenance or rebuild strategy.

Details:

6 003 OVERSIZE WRIST PINS FIT GM CYLINDER 261CI. THEY WERE USED IN 1954-1962 CHEVROLET TRUCKS.

part #: p1136003 price

  • $38.25

specifications pistonrinro:

  • for makes: Chevrolet
  • for years: 1954-1962
  • brand: Trw
  • mpn: P1136-003
  • type: Wrist Pins
  • items included: 6 Oversize Wrist Pins
  • material: Cast Iron
  • vintage part: Yes
  • country of origin: United States
  • performance part: No

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  • cost: $14.85
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general pistonrinro:

  • Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts
  • condition: New

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seller pistonrinro:

  • # reviews: 728
  • rating: 100.0%
  • city: Wadena, Minnesota

offer pistonrinro:

  • best offers: True
  • quantity: 1
  • options: Ship-to-home
  • started: April 30, 2026
  • sold: 0
  • availability: In Stock
for makes: chevrolet, for years: 1954-1962, type: wrist pins, items included: 6 oversize wrist pins, vintage part: yes, country of origin: united states, performance part: no,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: cast iron, sku: 13387623754323722,
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