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      11-23-2018, 03:53 PM   #32
mback12000
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Drives: 2018 540i
Join Date: Nov 2018
Location: NY

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Quote:
Originally Posted by drmlee View Post
the right side reservoir cap is hard to open. i had to put a towel over it and twist it as hard as i could and it finally opened. use more force or get someone who is stronger to open it. it will open, i just had to add more coolant this morning.
NOOOOOOO!!! Do NOT apply extra force. The cap is not opening because it locks under system pressure. Wait for it to TOTALLY cool down. Also, if you look next to the cap you will see the system air bleed. Use a straight screwdriver and CAREFULLY crack it open a bit it to bleed system pressure. If the cap isn't opening easily stop before you break it.
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