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Nikasil & Galnikal
- Thread starter sep686
- Start date
pglaves
#13338
BMW hasn't used steel sleeves since sometime in the 1980s. I know the original coating used in the Airhead engines was referred to as Nikasil. How that differs, if at all, from what they have used on the later models I have no clue.
Paul has the info right. Snowbum has more details here:
https://bmwmotorcycletech.info/cylinders.htm
Began using these coatings for the 1981 models. As Snowbum says, the two products were trademarked by different companies but are essentially the same sort of product in terms of function.
https://bmwmotorcycletech.info/cylinders.htm
Began using these coatings for the 1981 models. As Snowbum says, the two products were trademarked by different companies but are essentially the same sort of product in terms of function.
I did read through that earlier and found it very informative. Just wasn’t sure if BMW switched away from it. Seems like they had issues with it in their v8s in their cars so I thought maybe Nikasil was a thing of the past at this point
pglaves
#13338
Nikasil apparently can impose some quality control issues. If I recall the model correctly they had some issues with early cylinder damage on some early R1200 engines. In any case, there was a model and year where application quality issues caused what was described as portions of the cylinder wall flaking off. But in total taking all the years and models where it has been used the failure rate is miniscule.
