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Racing Blog

Project and Technical Write ups for BMW and Porsche.

7 Series Parking Break Actuator Plastic and Metal Gear

How to fix E65 E66 BMW 7 Series Parking Break Actuator Failure – Plastic Gears vs Metal Gears

By Andrew | Sep 25, 2017

Upon inspection we discovered that the original gears in the actuator are plastic. Over time the plastic becomes brittle and cracks causing the unit to fail. As a result the actuator was unable to turn the gear and release the parking brake. We’d love to hear your thoughts on the modernization of systems that may…

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Porsche GT1 Engine M96.70 and M97.70 Coolant Pipe Pinning Service (996 997 Turbo GT2 GT3)

By Andrew | Jun 24, 2017

In 1998 Porsche made the switch in its engine architecture to water cooling. The GT1 engine found its way into the 996 Turbo, GT3, and GT2 as well as the 997 models. The engines varied slightly but they all carried a similar design feature. The addition of water cooling was done using several externally mounted…

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N62 Valve Stem Seal Replacement on 540, 545, 740, 645, 650, 745, 750, X5 4.4 and X5 4.8

By Andrew | Aug 30, 2016

The N62 engine was used in most BMW powered V8 cars produced from 2001 all the way through 2010. While it was a very successful engine, it was known for having some expensive maintenance issues and now that these cars are all out of warranty the costs fall on the owners to take care of.…

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N54 Turbo Replacement on BMW 335i, 135i, 535i, X6, and Z4

By Andrew | Aug 30, 2016

The N54 has was used in a wide range of BMW’s starting in 2006 with the 335i. In 2007 it was used in the 135i and 535i. Later in 2008 it was introduced in the X6 xDrive35i and again in 2009 on the Z4 sDrive35i. While the engine is well known for making good reliable power from…

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E46 M3 SMG to Manual Conversion

E46 M3 SMG to Manual Conversion

By Andrew | Feb 27, 2016

The E46 M3 had a couple major issues, one of the lesser ones is the SMG gearbox. The hydraulic pump often fails resulting in a costly repair. If this happens to a car you own it often make sense to convert the car to a manual rather than fix the SMG unit. Manual E46 M3’s…

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LN Engineering IMS Bearing Retrofit Installation Services for Porsche 996 and 997

By Andrew | Feb 27, 2016

The intermediate shaft has been used on all Porsche engines since 1965. The intermediate shaft drives the camshafts indirectly off of the crankshaft. This allows the speed of the chains to be reduced and thereby extend chain life. This Porsche design has been common to all aircooled six-cylinder Mezger engine until 1998. The IMS is also…

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BMW E60 E61 M5 and E63 E64 M6 Rod Bearing Replacement and Inspection Service

By Andrew | Jan 6, 2016

Here at Lang Racing we’ve grown accustomed to the intense maintenance that BMW Motorsport engines require. The rod bearings on the S85 engines don’t seem to last anywhere near as long as they do on the standard 5 or 6 series engines. Since the labor is straightforward to replace the rod bearings on this V10 we have…

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BMW E90 E92 and E93 M3 S65 Rod Bearing Replacement and Inspection Service

By Andrew | Nov 29, 2015

We’ve come to expect BMW Motorsport engines to be engineered to require some pretty intensive maintenance. The rod bearings on the S65 engines don’t seem to last anywhere near as long as they do on the standard 3 series engines. Since the labor is straightforward to replace the rod bearings on this V8 we have…

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Walnut Blasting Carbon Cleaning Service for BMW N54 N55 M57 Engines – 335i – 135i – 335D – X5 35D – 535i

By Andrew | Nov 14, 2015

Why Does This Happen? Modern BMW engines now feature direct injection,which offers advantages in fuel consumption efficiency as compared to conventional port fuel injection. The N54, N55 engine of the 335i, 135i, and 535i are all direct injection; this means in particular that the fuel is injected directly into the combustion chamber of each cylinder and…

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