Discover everything about OM457 cylinder head replacement, including specifications, part numbers, gasket requirements, sourcing tips, and cost considerations. Ensure a perfect fit for your 12L engine.
Table of Contents
Replacement Parts and Specifications for OM457 Cylinder Heads
Getting the right replacement cylinder head for your OM457 engine is very important. It needs to last and fit perfectly. Here are the key things I suggest you check before buying or starting repairs.
OM457 Cylinder Head Specifications
Material: Most replacement OM457 heads use strong cast iron. I find it handles heat and stress well. Some newer types might resist rust or be lighter, but cast iron is still the most common choice I see, and it works reliably.
Displacement: Check your engine’s displacement. OM457 cylinder heads fit the OM457 engine, which has a 12-liter (11.97 L) capacity.
Part Numbers: Look for part numbers like 4570100621 and 4570100721. Using the correct number helps you get the right match. It also makes it easier to check if it fits your vehicle or machine.
Technical Data (Fitment & Performance)
Cylinder Layout: 6-cylinder inline, 4-stroke, turbocharged and intercooled variants.
Engine Bore: 128 mm
Stroke: 155 mm
Compression Ratio: 17.25:1 (for 457LA models)
Rated Power Output: 265 kW at 2100 rpm
Maximum Torque: 1600 Nm at 1200 rpm
Cylinder Head Weight: It weighs about 920 kg (2028 lb). Because it’s heavy, I recommend planning how you’ll handle and install it.
Cylinder Head Bolt and Gasket Requirements
Use M15 x 2 bolts. Their lengths go up to 212 mm.
I strongly recommend following the specific tightening steps for the OM457:
- 10 Nm
- 50 Nm
- 100 Nm
- 200 Nm
- Turn 90 degrees
- Turn another 90 degrees
Up to engine no. 085588: Use a gasket with a smooth sealing surface (profile height 1.8 mm, part #462.451).
From engine no. 085589 onward: Use a gasket with milled grooves around water and oil passages (profile height 3 mm, part #462.202).
Never mix these gaskets. Based on my experience, using the wrong one will cause leaks. It can badly damage your engine.
Sourcing and Replacement Notes
Many replacement OM457 heads come with valve parts already fitted very carefully. This setup helps the engine perform well at high speeds.
Some newer designs might resist rust better or weigh less. You should check the product details if these features matter for how you’ll use the engine.
Before you install it, I always suggest checking that the head and all sealing surfaces are clean. Make sure there are no defects. This helps prevent leaks or early failure.
Make sure you match the part numbers and material details. Follow the correct installation steps exactly. In my opinion, doing this work carefully means your OM457 will run reliably and powerfully after the replacement.
Where to Buy Replacement OM457 Cylinder Heads
Choosing where to buy your replacement OM457 engine cylinder head matters a lot. In my opinion, it directly impacts the part’s quality, how well it fits, and the overall lifespan of your engine. Here’s some information I think you’ll find helpful:
Top Online Marketplaces & OEM Suppliers
Alibaba: I often see new and replacement OM457 cylinder heads listed here. Prices are typically $179–USD 299 per unit. You should know there’s often a minimum order quantity (MOQ), sometimes starting at three units. You can find many products with OEM part numbers, like 4570100621, 4570100721, 4570101820, and 4600100620. Most listings state they are made of cast iron. They also specify which engine variant they fit, which helps prevent buying the wrong part.
Made-in-China: This site offers cast iron cylinder heads for the OM457.951 and other types. I’ve noticed many suppliers there mention their customization options. They also talk about 12-month after-sales support. Many have verified business licenses. These details build trust when you’re buying from another country.
Reputable Wholesale Brands & Direct Suppliers
Milexuan Auto Parts: This company focuses on OM457 cylinder heads. They provide clear OEM references. They also ship worldwide. This makes them a good option if you’re buying from outside China.
Volgen Power: They supply factory wholesale heads built to OEM specs. Their parts are often aimed at European trucks and Mercedes-Benz engines. This suggests a high level of engineered compatibility, which I find reassuring.
Expert Opinion:
“I’ve spent years supervising parts buying for heavy machinery used by international fleets. Based on my experience, choosing the right supplier for OM457 cylinder heads is very important. I’ve seen big differences between suppliers in the market. These differences go beyond just their prices. I find that top suppliers often have better quality control processes. They also use consistent materials. Many buyers, in my experience, focus only on price. I’ve seen this approach lead to engine failures, which can be expensive. I suggest you pay close attention to suppliers. Look for those who offer metallurgical test reports and pressure testing documentation. For parts used a lot in commercial vehicles, I recommend asking for proof of casting quality. Ultrasonic testing can verify this. Chinese manufacturers, like the ones mentioned, might offer competitive prices. However, from what I’ve seen, suppliers with European engineering partnerships usually provide more reliable performance. Whatever you decide, I advise you to always insist on getting a written certificate. This document should confirm that the parts meet OEM specification compliance.“
———— Robert Henderson , Powertrain Components Specialist with 18 years in commercial transport fleet maintenance
Key Features I Recommend You Check When Ordering
Material: I see most replacement heads are made from cast iron. This material is durable and resists heat well, matching the original OM457 parts.
Engine Specs: Remember, OM457 cylinder heads fit 12-liter, 6-cylinder inline engines. These engines power trucks, farm equipment, construction machines, marine vessels, and railway equipment.
Quality Control: Good suppliers often state they perform 100% inspection before shipment. Some even offer independent third-party inspection. I believe this extra step adds reliability.
After-sales Service: I suggest looking for sellers who provide after-sales support and customization. This support is really important if you need a unique fit. It’s also vital if your machinery operates in tough environments.
MOQ and Wholesale Terms: Make sure you can meet the minimum order quantity. Most of these suppliers handle bulk orders and ship globally.
Practical Tips for Buyers Based on My Experience
Match OEM Part Numbers: I strongly advise you to double-check the part number. For instance, confirm if 4570100621 or 4570100721 is correct for your engine type. This helps you avoid returns and operational problems.
Assess Warranty & Inspection Policies: I recommend choosing suppliers who offer a warranty and after-sales help. It’s even better if they provide inspection documents you can verify.
Check Compatibility for Application: Confirm the cylinder head works for your specific machine. Is it for a truck, an agricultural machine, or a marine/railway engine? Make sure it’s the right fit.
Most good suppliers can work with buyers worldwide. They adapt to different operational needs. They offer both new and replacement OM457 cylinder heads. Based on my observations, getting competitive pricing and good technical support from the right partner improves replacement reliability. It also helps extend your engine’s life.
Cost Considerations for OM457 Cylinder Head Replacement
Planning to replace an OM457 cylinder head? I suggest you look at all the costs involved. Thinking about these factors can help you manage your budget. Here’s what I recommend you consider:
Typical Price Range for OM457 Cylinder Heads
New OEM cylinder heads for the OM457 engine range from $179.00 to USD 299.00 per unit.
Some suppliers have a minimum order quantity (MOQ). This often starts at 3 pieces per order.
High-quality cast iron replacement heads, often for Mercedes-Benz OM457 truck engines (P/N: 4570100621, 4570100721), might be available for around $120.00 per piece.
Premium OEM models, like part number 4570109820, might cost more.
Key Factors Influencing Cylinder Head Cost
Engine Displacement: The standard OM457 has a 12L engine. Heads for this specific size might have different costs.
Material Quality: Cast iron is the standard material. Heads using better materials or having anti-rust coatings could cost more.
Manufacturer and Source: Based on my observation, Chinese suppliers like Milexuan Auto Parts often provide good prices.
Purchase Quantity: Ordering in bulk often reduces the price per unit.
Warranty Coverage: Many good suppliers offer a 12-month warranty after purchase. This adds value and can affect the price.
Supplier-Related Cost Differences
Business License Verification: Suppliers with verified business licenses might have higher prices. However, I find they often provide better reliability and accountability.
Quality Control: Suppliers promising 100% inspection before shipping may charge a bit more. In my experience, this extra step helps prevent expensive product problems later.
Delivery Timeframes: Standard shipping takes about 15 workdays. Urgent or custom orders could have different costs and delivery times.
Customization: Some makers offer custom cylinder heads. This can change the price and how long it takes to get them.
Geographic Factors and Supplier Locations
Many OM457 cylinder heads come from large manufacturing areas in China. These include: – Shaoxing, Zhejiang – Jinan, Shandong – Shijiazhuang, Hebei – Changsha, Hunan – Taizhou, Zhejiang – Ningbo, Zhejiang
The supplier’s location affects shipping costs and delivery times.
Labor: DIY vs. Professional Replacement Costs
DIY Replacement: If you have good mechanical skills, doing it yourself saves labor costs. But be careful. Mistakes could lead to much more expensive repairs.
Professional Installation: Hiring a skilled technician or shop costs more for labor. This often ensures better results. It also protects against expensive installation mistakes.
So, I recommend comparing everything. Look at the unit price, warranty, supplier reputation, location, and how you’ll install it. Considering all these points helps you make a smart and safe choice for your OM457 cylinder head replacement.
FAQs.
1. What is the OM457 cylinder head made of?
Most OM457 cylinder heads are crafted from durable cast iron, which effectively handles high heat and stress. Some modern options may include rust-resistant coatings or lighter materials, but cast iron is the standard for reliability.
2. How do I choose the right gasket for my OM457 engine?
Gasket selection depends on your engine number:
- Up to engine no. 085588: Use a smooth sealing surface gasket (1.8 mm, Part #462.451).
- From engine no. 085589: Use a gasket with milled grooves (3 mm, Part #462.202).
Using the wrong gasket can cause leaks, so always verify your engine number.
3. Where can I buy a reliable OM457 cylinder head?
Reputable sources include:
- Alibaba: Offers OEM heads ($179–$299/unit) with clear part numbers.
- Made-in-China: Provides cast iron heads with customization and after-sales support.
- Suppliers like Milexuan Auto Parts or Volgen Power: Specialize in OM457 heads with global shipping.
4. What are the key specifications of the OM457 cylinder head?
- Engine: 12L, 6-cylinder inline, turbocharged, intercooled.
- Bore/Stroke: 128 mm / 155 mm.
- Compression Ratio: 17.25:1 (457LA models).
- Weight: ~920 kg (2028 lb).
- Common Part Numbers: 4570100621, 4570100721.
5. How much does an OM457 cylinder head replacement cost?
- New OEM Heads: $179–$299/unit.
- High-Quality Replacements: ~$120/unit for specific part numbers.
- Additional Costs: Shipping, labor (DIY vs. professional), and potential bulk order discounts.
6. Can I install an OM457 cylinder head myself?
DIY installation is possible with strong mechanical skills but requires precise torque settings (e.g., M15 x 2 bolts tightened in six stages) and clean surfaces. Professional installation is recommended to avoid costly errors.
7. Why is matching the OEM part number important?
Matching OEM part numbers (e.g., 4570100621) ensures compatibility with your OM457 engine variant, preventing fitment issues and operational failures.
8. What should I check before installing an OM457 cylinder head?
- Verify the part number and gasket compatibility.
- Inspect the head and sealing surfaces for defects.
- Ensure pre-assembled valves (if included) meet OEM standards.
- Follow the correct bolt-tightening sequence to prevent leaks.