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2007 BMW 328xi Base Sedan
 
BMW Home > 2007 BMW 328xi Base Sedan > EngineCylinder Head & Valvetrain 

Cylinder Head & Valvetrain

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Valve Springs

Valve springs are used to provide constant tension on the valves. Without them, the valves would make contact with the tops of the pistons and cause damage. It's a good idea to have your old valve springs checked by your machine shop to make sure that they have the correct spring tension. If they do not meet the correct specifications, you should replace them with new ones.

Valve Keeper for 6 mm Valve Stems
Valve Spring Compressors
Valve Spring Compressor Protective Cover - Cylinder Head Saver  
 
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Note: Black Delrin protective cover that clips onto valve spring compressor tools. Provides protection against contact with cylinder head and sharp edges of the spring compressor. Fits most spring compressor types.

AGA
Brand Rating
$39.50

With this latest evolution to our Universal Valve Spring Tool we have added the ability to actuate the compression tube even in tight confined locations like under the cowl where the lever cannot be moved or may not even fit. By adding the ability to separate the lever from the compression tube anywhere along the bar you can compress the springs that are confined by brake boosters, AC housings or other factors by locating the lever along the bar where there is open space.

  • Access to valves in areas that are not in open areas with engine in vehicle
  • Valve springs can be depressed "remotely", depressor bar and compression tube are separate
  • Complete universal kit with multi adjustable points
  • No need to remove engine due to confined areas saving time
  • No other valve spring compressor is as universal and adjustable
  • Depressor tube slides easily to each valve location without changing settings
  • All components store neatly in a blow molded box

Valve Lifters and Rockers

Whenever you replace the camshaft, you should replace the lifters and rockers as well. As with any moving part, they wear down, so installing a new camshaft with old lifters can cause premature wear on your camshaft.
Hydraulic Valve Lifter (Intake)

Hydraulic Valve Lifter (Exhaust)

Rocker Arms and Shafts

Rocker arms transfer the energy from the camshafts and/or pushrods, to the valves. One end is moved by the camshaft and/or pushrod, while the other side moves the valve stem - physically moving the valve up and down.
Rocker Arms
The rocker arm is used to actuate the opening of either the intake or exhaust valve. It is essentially a pivot operated by either the camshaft lobe or a pushrod.

Cylinder Head Bolts

When doing a rebuild, or replacing the head, you should always replace the bolts holding the head to the block, as they have a tendency to stretch after they are torqued, which can cause numerous problems including blown head gaskets, loss of compression, and possible engine damage if a bolt head breaks off inside the valve train.
Cylinder Head Bolt Set (Aluminum)  
 
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Note: 4 bolts per set, Also use- (Qty.) (1) 11 12 7 548 799 Cylinder Head Bolt Set,

Genuine BMW
Brand Rating
$8.00

Cylinder Head Bolt Set (Torx)
Cylinder Head Bolt Set (Torx)  
 
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Note: 14 bolts per set, Also use- (Qty.) (1) 11 12 0 392 547 Cylinder Head Bolt Set,

Victor Reinz
Brand Rating
$28.25

Cylinder Head Bolt Set (Torx)  
 
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Note: 14 bolts per set, Also use- (Qty.) (1) 11 12 0 392 547 Cylinder Head Bolt Set,

Elring Klinger
Brand Rating
$29.00

BMW Home  >  2007 BMW 328xi Base Sedan > Engine  >  Cylinder Head & Valvetrain 

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Page last updated: Wed 12/6/2017 12:45:06 AM
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