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BMW N52/N54 Camshaft Bearing Ledges

BMW N52/N54 Camshaft Bearing Ledges

Removing Camshaft Bearing Ledges from a BMW N52 engine due to grooving

If your 05-08 N52 (found in 128i, 325i, 328i, 330i, 525i, 528i, 530i, X3, X5 & Z4) or 07-08 N54 (found in 135i, 335i, 535i, X3, X5) equipped BMW is shuddering at idle and giving you a check engine light with VANOS related codes (or boost leak related codes in N54 engines), it may be time for a camshaft bearing ledge replacement.

The metal rectangurings that are inside the camshaft bearing ledges (which house the camshafts) originally equipped on the N52 and N54 engines wear down with time, allowing play within the bearing ledges. This play leads to grooves developing in the ledges and allows fluctuations in oil pressure, causing the check engine light to come on.

BMW N52 Camshaft Bearing Ledge showing grooving from a worn rectanguring

Grooving in a Camshaft Bearing Ledge. The two rivets are where the oil comes through and the grooving is present where oil pressure is controlled.

Grooving found in a BMW N52 Camshaft Bearing Ledge from a worn rectanguring

More Grooving in a Camshaft Bearing Ledge

BMW N52 Camshaft Bearing Ledge showing grooving from a worn rectanguring

A closer look at the grooving on the bearing ledge

BMW N54 Intake and exhaust camshaft bearing ledges after being removed from the vehicle

N54 Intake and exhaust bearing ledges out of the vehicle

BMW N54 Intake and exhaust camshaft bearing ledges after being removed from the vehicle

The N54 intake and exhaust bearing ledges out of the vehicle and separated

What can be done to fix it? In both the N52 and N54 engines, the camshafts are removed and the metal rectangurings are replaced with more resilient superceded BMW OEM Teflon rings. In both the N52 and N54 engines, the camshaft bearing ledges are inspected and replaced if they are grooved. The N54 engines have both exhaust and intake bearing ledges, while the N52 engines only have exhaust bearing ledges.

Removing Camshaft Bearing Ledges from a BMW N52 engine due to grooving

The camshaft bearing ledge removal process in an N52

Removing Camshaft Bearing Ledges from a BMW N52 engine due to grooving

 

BMW N54 engine exhaust and intake camshaft bearing ledges

Intake and exhaust bearing ledges in an N54

BMW N54 engine exhaust and intake camshaft bearing ledges

Another shot of the N54 intake and exhaust bearing ledges

 

 

Early model BMW N52s were equipped with a metal rectanguring

Old metal rectanguring

Upgrade Teflon Rectanguring on an early model BMW N52 engine to prevent camshaft bearing ledge wear

Upgraded BMW OEM Teflon Rectanguring

As the camshaft bearing ledge replacement is a labour intensive task, it’s necessary to keep the vehicle in the shop for several days while the job is completed.

For a camshaft bearing ledge replacement estimate for your BMW, please contact us by phone at 905-841-8948 or e-mail us at info@tmwerkes.ca.

 

One Response

  1. […] issue with the N52 though. Tech Tip: BMW’s Power Reduction and Vanos Faults Are Stored In DME BMW N52/N54 Camshaft Bearing Ledges And for some reason the intake camshaft bearing ledges are built into the head! So only way to fix […]

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