Bmw Bm54 Repair Kit
BM54 Repair ServiceWe are BM54. We specialise in diagnosis and repairs of BM54 and BM24 units in BMW and Land Rover.
Www.Vanos-BMW.com/BMW-VANOS-problem-solved.mp4Removing the vanos piston bearing axial play significantly reduces the rattle. Also replacing the helical gear components (splined shaft, camshaft, sprocket) is expensive and the helical gears will wear again. Thus removing the vanos piston axial play is a practical approach to addressing the rattle problem. Furthermore, per bearing specification and consultation with bearings companies, there should be no bearing axial play and a notable axial pre-load (tightness) should be present.The vanos piston bearing is made of a thick washer and two thrust (roller) bearings. The washer if mounted to the splined shaft and the two thrust bearings sandwich the washer facilitating the washer to rotate at camshaft speed. The washer and two thrust bearings are incased in a ring and two ring outer washers.
The complete bearing is housed inside a piston cavity and is closed off with a piston bolt/cap.Removing the bearing axial play requires modifying or replacing at least one bearing component. The thrust bearings are a standard part and are manufactured to tight tolerances. It’s not feasible to modify or replace them. The ring and center washer are non standard parts and are manufactured to loose tolerances. The ring height can be reduced or the center washer height can be increased to remove the bearing axial play. The ring has been found to have a large height variation and the washer has been found to have a smaller height variation. Due to these findings, it’s more effective to replace the ring.
A bearing adjustment can be made at installation to address any minor axial fit variation.The bearing ring and center washer were assessed by a metallurgical consulting firm. The parts were assessed for their material makeup, hardness including micro depth hardness, manufacturing process and finish.As a solution to the vanos rattle problem a replacement vanos piston bearing ring is manufactured to the same specification as the original bearing ring but with a shorter height and a very tight height tolerance. The other ring dimensions are also manufactured to tight tolerances.The bearing ring is a difficult and expensive component to manufacture. It’s made from a special bearing steel and hardened to a high hardness.
Bmw Bm54 Repair Kit Reviews
All its surfaces are ground.