- In summary, truck spark plugs play a crucial role in the performance and reliability of heavy-duty vehicles. By selecting the right spark plugs for your engine and maintaining them properly, you can ensure that your truck's engine runs smoothly and efficiently, extending its life and minimizing the risk of breakdowns.
- Metallic oil seals consist of a metal casing or carrier that houses a flexible sealing element made of a resilient material such as rubber orPTFE (polytetrafluoroethylene). The sealing element is designed to conform to the surface of the shaft or housing it is,。 The metal casing provides strength and durability, while the flexible sealing element ensures a tight seal even under extreme conditions.
Special exceptions still apply within the Volkswagen group. With PTFE oil seals, an aluminium or plastic housing is used in many different engine series. The Top Dead Centre (TDC) signal is no longer measured at the flywheel, but directly using a sensor on the rear crankshaft flange and integrated sensor in the oil seal. Special procedures and tools must be used for the disassembly and assembly of these parts.
ERIKS type R (type A according to the DIN standard) is identical in shape to type M, but has a rubber outer case with metal reinforcement on the inside. The rubber creates a good seal in the housing, even if the housing has suffered minor damage or is not in its best condition for other reasons. The RST version has a dust lip. These types are often chosen to replace a type with a metal outer case because they are easier to install and can cope with minor damage to the groove, such as scratches.
- Understanding Spark Plugs A Comprehensive Guide

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Although it does have a higher tensile strength and longer wear times than other materials, it is recommended to be used in dry-running applications sparingly or intermittently.