OEM Aluminum Valve Cover for 2006-2007 BMW 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, 530xi, Z4

What to look for when buying this part:

• Check for cracks, damage, or repairs.
• Make sure the gasket surface is clean and flat.
• Inspect the bolt holes for damage or stripped threads.
• Verify that all necessary components are included (e.g., gasket, bolts).

Quality indicators for the available options:

What's typically included with the part:

• Aluminum Valve Cover
• Valve Cover Gasket (sometimes included)
• Sometimes includes bolts or studs

Difficulty level and estimated time:

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

Special tools needed (if any):

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

Critical steps and tips:

1. Disconnect the battery: This prevents electrical shorts during the repair.
2. Remove the air intake and other components: This provides access to the valve cover.
3. Carefully remove the old valve cover: Avoid damaging any surrounding components.
4. Clean the gasket surface: Ensure a clean, smooth surface for the new gasket.
5. Install the new valve cover and gasket: Torque the bolts to the manufacturer's specifications.
6. Reinstall all components: Double-check all connections before starting the engine.

Whether DIY is recommended or professional installation is better:

• DIY is possible for experienced mechanics.
• Professional installation is recommended for those unfamiliar with engine repair.

Compare: Used OEM, Refurbished OEM, New Aftermarket

| Option | Pros Used OEM:

• Pros: Genuine factory parts, tested and inspected, at significantly lower prices.
• Cons: May have cosmetic imperfections.

Refurbished OEM:

• Pros: Factory parts professionally restored with new components.
• Cons: May be more expensive than used parts.

New Aftermarket:

• Pros: Brand new third-party parts built to OE specs.
• Cons: Quality can vary.

Parts commonly replaced or checked at the same time:

• Valve cover gasket
• Spark plug tube seals
• PCV valve
• Breather hoses

Why replacing related parts prevents repeat failures:

• Old gaskets and seals can leak, causing oil to contaminate the spark plugs and other components.
• A faulty PCV valve can cause excessive pressure in the crankcase, leading to leaks.
• Replacing these parts together ensures a complete repair and prevents future problems.

How long this part normally lasts:

• 75,000 - 150,000 miles

Factors that affect longevity:

• Driving conditions (extreme heat or cold)
• Quality of engine oil and maintenance schedule
• Engine operating temperature
• Over-tightening of valve cover bolts

Budget vs mid-range vs premium options:

• Used OEM: $50 - $150
• Refurbished OEM: $100 - $250
• New Aftermarket: $120 - $300

Labor cost considerations if applicable:

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

Total job cost estimates:

• DIY: $50 - $300 (parts only)
• Professional Installation: $250 - $800 (parts and labor)

Known issues for this vehicle's system related to this part:

• The original valve cover is made of plastic, which can become brittle and crack over time.
• Oil leaks are common around the valve cover gasket.
• Some models may experience issues with the PCV valve integrated into the valve cover.

Any TSBs or common complaints:

• Check for 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.
• Listen for any unusual noises from the engine.

What to look/listen for to verify it's working correctly:

• No visible oil leaks.
• Smooth engine idling.
• No burning oil smell.
• No engine misfires.

Q: How do I know if my valve cover gasket is leaking or if it's the valve cover itself?

A: Look for oil pooling around the valve cover gasket. If the valve cover itself is cracked, you'll likely see oil seeping from the crack. A smoke test can also help pinpoint the source of the leak.

Q: Can I drive with a leaking valve cover?

A: It's not recommended. A leaking valve cover can cause oil to drip onto hot engine components, creating a fire hazard. It can also lead to engine damage if the oil level gets too low.

Q: Is it necessary to replace the valve cover bolts when replacing the valve cover?

A: It's a good idea. The valve cover bolts can stretch or become corroded over time. Replacing them ensures proper torque and sealing.

Q: What happens if I over-tighten the valve cover bolts?

A: Over-tightening the bolts can crack the valve cover, especially if it's made of plastic. Always use a torque wrench and follow the manufacturer's specifications.

Q: How often should I check my valve cover for leaks?

A: You should visually inspect your valve cover for leaks during every oil change. This will help you catch any problems early and prevent more serious damage.

OEM Part Numbers:

• BMW: 11127531713, 11127548274, 11127548275

Fits Years: 2006 2007