Just watched a video over at Youtube detailing spark plug replacement on the 1.4l Tsi engine. Fairly new video dated May 2019.
Anyway the installer states that at least the VW plugs threads are cut to provide the correct indexing when torqued to the factory spec of 22 newton meters.
When ever I replace mine in a few years I am going to compare the thread cut on both the old and new plugs. I wonder if other manufactures are doing this also?
Here's what he states. Any VW wrenches that can verify.
The threads on the spark plug and the cylinder head are precisely cut and they define the position of the spark plug in such a way to place the earthing electrode pointing towards the exhaust valves.
This substantially improves the cooling of the spark plug due to the fresh gas streaming in.
Anyway the installer states that at least the VW plugs threads are cut to provide the correct indexing when torqued to the factory spec of 22 newton meters.
When ever I replace mine in a few years I am going to compare the thread cut on both the old and new plugs. I wonder if other manufactures are doing this also?
Here's what he states. Any VW wrenches that can verify.
The threads on the spark plug and the cylinder head are precisely cut and they define the position of the spark plug in such a way to place the earthing electrode pointing towards the exhaust valves.
This substantially improves the cooling of the spark plug due to the fresh gas streaming in.