Iftikhar Khan 1 Report post Posted November 7, 2022 (edited) My BMW X1 2011 have done only 45k and its rocker head cover gaskit / seal was cracked and leaking oil. Never expected this from BMW. Later I have come to know that its common problem with BMW. The plastic cover is also de-shaped a little. My mechanic have fixed a later model with the same issue. Why BMW don't make covers from a high temp resistant material? I have seen BMW running in +40 degree heat of Middle East but temperature in New Zealand are much lower then other hot countries. Edited November 7, 2022 by Iftikhar Khan spellings 1 Quote Share this post Link to post Share on other sites
Young Thrash Driver 1020 Report post Posted November 7, 2022 There are issues with the PA66 type plastic used. Ambient outdoor temps are meaningless when engine internal temps exceed 100°C which is outside where PA66 is stable. I agree, BMW are letting themselves down. From their perspective however it has failed outside the warranty period so there is no issue- and it is an 11 or 12 year old car. Quote Share this post Link to post Share on other sites
