OEM Aluminum Valve Cover for 2006-2008 BMW 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, 530xi, Z4

What to Look for When Buying This Part:

• Check for cracks or damage to the valve cover.
• Inspect the gasket surface for flatness.
• Verify the part is made of aluminum.
• Ensure all mounting points are intact.

Quality Indicators for the Available Options:

What's Typically Included with the Part:

• The aluminum valve cover
• Valve cover gasket (sometimes included, verify before purchasing)
• Mounting bolts (sometimes included, verify before purchasing)

Difficulty Level and Estimated Time:

• Difficulty: Medium
• Estimated Time: 2-4 hours

Special Tools Needed (if any):

• Socket set
• Torque wrench
• Screwdrivers
• Pick set (for removing old gaskets)
• Cleaning supplies (brake cleaner, rags)

Critical Steps and Tips:

1. Disconnect the battery.
2. Remove any components obstructing access to the valve cover (e.g., air intake, hoses).
3. Loosen and remove the valve cover bolts in a crisscross pattern.
4. Carefully remove the old valve cover.
5. Clean the gasket surface on the cylinder head thoroughly.
6. Install the new valve cover gasket.
7. Install the new valve cover and tighten the bolts to the manufacturer's specified torque in a crisscross pattern.
8. Reinstall any removed components.
9. Reconnect the battery.

Whether DIY is Recommended or Professional Installation is Better:

• DIY is possible for mechanically inclined individuals.
• Professional installation is recommended for those unfamiliar with engine repair.

Compare: Used OEM, Refurbished OEM, New Aftermarket

| Option | Pros it | Cons | Used OEM | * Genuine factory parts, tested and inspected, at significantly lower prices | | Refurbished OEM | * Factory parts professionally restored with new components | | New Aftermarket | * Brand new third-party parts built to OE specs |

Used OEM: Best value - genuine factory parts, tested and inspected, at significantly lower prices.

Refurbished OEM: Factory parts professionally restored with new components.

New Aftermarket: Brand new third-party parts built to OE specs.

Parts Commonly Replaced or Checked at the Same Time:

• Valve cover gasket
• PCV valve
• Spark plugs
• Ignition coils

Why Replacing Related Parts Prevents Repeat Failures:

• Replacing the valve cover gasket ensures a proper seal and prevents future oil leaks.
• A faulty PCV valve can cause excessive pressure in the crankcase, leading to valve cover failure.
• Replacing spark plugs and ignition coils at the same time ensures optimal engine performance.

How Long This Part Normally Lasts:

• 75,000 - 150,000 miles

Factors That Affect Longevity:

• Driving conditions
• Maintenance schedule
• Quality of replacement parts
• Engine operating temperature

Budget vs Mid-Range vs Premium Options:

• Used OEM: $75 - $150
• Refurbished OEM: $150 - $250
• New Aftermarket: $175 - $300

Labor Cost Considerations if Applicable:

• Labor costs can range from $200 - $500 depending on the shop and location.

Total Job Cost Estimates:

• DIY: $75 - $300 (parts only)
• Professional Installation: $275 - $800 (parts and labor)

Known Issues for This Vehicle's System Related to This Part:

• These BMW models are known for valve cover gasket leaks due to the age of the vehicles and the heat cycles the engine experiences.
• The PCV valve on these engines is prone to failure, which can contribute to valve cover issues.

Any TSBs or Common Complaints:

• Check for any Technical Service Bulletins (TSBs) related to valve cover leaks or PCV valve issues on these BMW models.

How to Confirm Proper Operation:

• Start the engine and let it idle.
• Check for any oil leaks around the valve cover.
• Monitor the engine for any unusual noises or vibrations.
• Use an OBD-II scanner to check for any error codes.

What to Look/Listen for to Verify It's Working Correctly:

• No oil leaks
• Smooth engine idle
• No unusual engine noises
• No check engine light

Q: How do I know if my valve cover gasket is leaking?
A: You may notice oil leaks around the valve cover, a burning oil smell, or a drop in oil level.

Q: Can I drive with a leaking valve cover gasket?
A: It's not recommended. A leaking valve cover gasket can cause oil to drip onto hot engine components, creating a fire hazard. It can also lead to engine damage due to low oil levels.

Q: Is it difficult to replace the valve cover myself?
A: It's a moderately difficult job. If you're comfortable working on cars and have the necessary tools, you can likely do it yourself. Otherwise, it's best to have a professional mechanic do it.

Q: What is the PCV valve and why is it important?
A: The PCV (Positive Crankcase Ventilation) valve regulates pressure in the engine. A faulty PCV valve can cause excessive pressure, leading to valve cover gasket leaks and other engine problems.

Q: Should I replace the valve cover bolts when I replace the valve cover?
A: It's generally a good idea to replace the valve cover bolts, especially if they are corroded or damaged. New bolts will ensure a proper seal and prevent leaks.

OEM Part Numbers:

• BMW: 11127526665, 11127548274

Fits Years: 2006 2007 2008