MAZDA 928M-6B320 Dohc Harmonic Balancer Damper Crank Pulley 1.8L

( Brand: Mazda ), ( Manufacturer Part Number: 928M-6B320 ), ( Part Type: Balancer Crank ), ( Items Included: Bolts ), ( Vintage Part: No )

Review MAZDA 1991 95 Ford Mercury Dohc 1.8l Harmonic Balancer Damper Crank Pulley Oem fits 1991-95

The **Mazda 928M-6B320 (1991 1995 Ford Mercury Tracer 1.8L DOHC)** harmonic balancer, crank pulley, and damper assembly is a precision-engineered component designed to deliver smooth, vibration-free operation for this high-performance inline-four engine architecture. Built to replace the stock rubber-and-metal pulley system, this aftermarket unit incorporates a reinforced steel core with a high-quality elastomeric cover, engineered to absorb torsional vibrations and minimize engine shake while driving. The **6B320** engine, known for its DOHC (Dual Overhead Camshaft) design and twin-camshaft configuration, demands a pulley that can withstand the dynamic forces of its high-revving nature, and this harmonic balancer is specifically tuned to handle the torque characteristics of this Ford Mercury Tracer powerplant. The damper s internal rubber compound is formulated to resist cracking, hardening, or premature wear common issues in stock units ensuring long-term durability even under aggressive driving conditions. This pulley is also designed with a **serrated or slotted bolt pattern** to match the engine s crankshaft flange, allowing for a secure and precise fit, while its balanced construction helps reduce parasitic drag, improving overall engine efficiency. Whether installed on a classic Ford Mercury Tracer, a restored Mazda 928, or a modified high-revving project, this harmonic balancer ensures a quieter, smoother power delivery and protects the crankshaft from excessive stress. Built to exacting standards, it serves as an ideal upgrade for enthusiasts seeking to eliminate rattles, prevent premature wear on related components, and maintain optimal engine performance across the 1.8L DOHC s full powerband.

### **Pros and Cons of Buying a 1991 1995 Mazda 929 (M6-B320) and a 1990s Ford Mercury (1.8L DOHC) with Harmonic Balancer, Damper, and Crank Pulley Issues**

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### **Mazda 929 (M6-B320, 1991 1995)**

1. **Reliable Engine** The B320 is a well-regarded inline-6 engine known for durability, especially when maintained properly. With proper oil changes and cooling system care, it can easily exceed 200,000 miles.

2. **Strong Performance** The 3.2L engine produces around 160 170 horsepower, which is adequate for highway driving and light towing (with a properly rated transmission).

3. **Good Transmission Options** The 929 was available with a **5-speed manual** (preferred for longevity) or a **4-speed automatic** (less common but functional). The manual transmission is more reliable if maintained.

4. **Comfortable Ride & Handling** The 929 has a smooth ride, good suspension tuning, and decent handling for a mid-sized sedan. The front-wheel-drive layout makes it easier to drive in snow compared to rear-wheel-drive cars.

5. **Availability of Parts** As a popular import from the early '90s, parts (especially for the B320) are still widely available, though some aftermarket support has declined over time.

6. **Potential for Modifications** The B320 responds well to performance upgrades (intake, exhaust, camshafts) and can be tuned for better power without excessive stress.

7. **Lower Running Costs (Compared to Modern Cars)** Fuel efficiency is decent ( 18 22 MPG combined), and maintenance costs are lower than those of modern luxury or high-performance vehicles.

8. **Classic Appeal** The 929 has a timeless, upscale look that appeals to enthusiasts, making it a good choice if you enjoy driving a well-built classic.

1. **Electrical & Computer Issues** Early '90s Mazdas (especially pre-1994 models) suffer from **electrical gremlins**, including faulty sensors, wiring harness problems, and computer glitches. The **ECU (Engine Control Unit)** may need reprogramming or replacement if it fails.

2. **Transmission Problems (Automatic Models)** The **4-speed automatic** (A5LF) is known for **slippage, rough shifting, and eventual failure**, often requiring a rebuild or replacement. The manual transmission is far more reliable.

3. **Cooling System Weaknesses** The **thermostat, water pump, and radiator** are common failure points. The **electric cooling fan** (on some models) can also fail, leading to overheating.

4. **Rust Concerns** Depending on the region, the **floor pans, rocker panels, and subframe** may be rusted, requiring repairs if the car has been exposed to salt or moisture.

5. **Head Gasket Issues (Less Common but Possible)** While not as notorious as in some Japanese engines, **head gaskets can fail** if the car overheats or is neglected. Signs include **white smoke, coolant in oil, or compression loss**.

6. **Suspension Wear** The **shock absorbers, bushings, and control arms** wear out over time, leading to a rougher ride. Replacing these is a common maintenance task.

7. **Interior Quality** The **plastic trim and upholstery** can degrade over time, and some models have **poorly designed door panels** that trap moisture and cause rust.

8. **Limited Aftermarket Support** While parts exist, **specialty aftermarket support** (e.g., for performance tuning) is less robust than for more modern or popular cars.

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### **Ford Mercury (1.8L DOHC, 1990s) with Harmonic Balancer, Damper, and Crank Pulley Issues**

1. **Affordable & Simple** The **1.8L DOHC (Zetec or similar)** is a budget-friendly engine found in many Ford/Mercury cars (e.g., **Topaz, Mercury Tracer, Sable**). Parts are cheap and widely available.

2. **Decent Fuel Efficiency** Expect ** 25 30 MPG combined**, making it economical for daily driving.

3. **Easy to Work On** The engine is **relatively straightforward** for DIY mechanics, with common issues that are well-documented.

4. **Potential for Reliability (If Well-Maintained)** With **regular oil changes and cooling system care**, the 1.8L can last **150,000 200,000 miles** before major issues arise.

5. **Good for Beginners** If you're learning mechanics, this engine is a **good starting point** due to its simplicity.

1. **Harmonic Balancer & Damper Failures** The **harmonic balancer** (and sometimes the **crank pulley**) is a **major weak point**. These components **wear out quickly** (often between **60,000 120,000 miles**) and can **shatter**, causing **engine damage** if they fail.

- **Symptoms:** Vibration at idle, **loud clunking/knocking**, or a **sudden loud bang** (if it breaks).

- **Cost:** Replacement is ** $100 $200** (parts) labor, but **preventative replacement is recommended** if the car is driven regularly.

2. **Head Gasket Failures** The **1.8L DOHC is notorious for head gasket leaks**, especially if the car overheats. **Coolant mixing with oil** or **white smoke from the exhaust** are warning signs.

- **Cost:** Replacing head gaskets is **expensive ( $800 $1,500)** and labor-intensive.

3. **Valvetrain Wear** The **camshaft lobes and lifters** wear out over time, leading to **valve float, ticking noises, and reduced performance**.

4. **Transmission Issues (If Automatic)** Many Mercury models with the 1.8L came with **C4 automatic transmissions**, which are **prone to slipping and failure** over time.

5. **Rust & Body Corrosion** Like many '90s Fords, **floor pans, wheel wells, and undercarriage rust** are common, especially in snowy or coastal areas.

6. **Poor Reliability Compared to Alternatives** While not as bad as some Japanese engines of the era, the **1.8L DOHC is not known for longevity** and requires **more frequent maintenance** than a well-built inline-6 like the Mazda B320.

7. **Limited Power & Performance** The **1.8L makes only 90 110 horsepower**, which is **underpowered for highway passing** and feels **slow compared to modern standards**.

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### **Comparison Summary**

**Factor** **Mazda 929 (B320)** **Ford Mercury (1.8L DOHC)**

-------------------------- ---------------------- -----------------------------

**Engine Reliability** Very good (with care) Poor (head gaskets, balancer)

**Maintenance Cost** Moderate Low (but frequent small repairs)

**Power & Performance** Strong (160 HP) Weak (90 110 HP)

**Transmission Options** 5-speed manual (best) Often weak automatic

**Parts Availability** Good (but aging) Very good

**Common Failures** Electrical, cooling, suspension Harmonic balancer, head gaskets, valvetrain

**Best For** Enthusiasts, daily drivers, long-term reliability Budget projects, beginners, short-term use

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### **Ending Conclusion & Recommendation**

#### **Should You Buy a Mazda 929 (B320, 1991 95)?**

- You **prioritize reliability and longevity** over raw power.

- You **inspect the cooling system, electrical components, and transmission** thoroughly before buying.

- You **plan to maintain it properly** (regular oil changes, cooling system checks, suspension work).

- You **enjoy driving a well-built classic** and don t mind some '90s quirks (electrical gremlins, etc.).

- You **find a manual transmission model**, as they are far more reliable than automatics.

- You **can t commit to regular maintenance** (especially cooling system and electrical checks).

- You **need a high-mileage car** without a **detailed service history**.

- You **dislike dealing with electrical issues** (common in early '90s Mazdas).

- You **prefer modern convenience features** (modern infot

Details:

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Questions about fitment or condition.

part #: 928m6b320 prices

• $8.00-$39.99

specifications cranshafengin:

• for makes: Ford, Mercury, Mazda
• for years: 1991-95
• brand: Mazda
• mpn: 928m-6b320
• part type: Balancer Crank
• items included: Bolts
• vintage part: No

payments cranshafengin:

• credit card: Visa
• other
• wallet: Paypal

returns cranshafengin:

• policy: No Returns

offer cranshafengin:

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

shipping cranshafengin:

• transit: 4-9 Days
• class: Standard
• cost: $0.00
• type: Fixed
• service: USPS Ground Advantage
• carrier: USPS

seller cranshafengin:

• city: Cedarburg, Wisconsin
• # reviews: 1594
• rating: 100.0%

general cranshafengin:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

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