I just bought a 2002 BMW 1150 rtp with 110K miles. PO said he rode to work and home, next day it wouldn't start. Checked for spark good,, took off valve cover to see if valves were moving, good, and gave up. I trucked it home and after 2 days of work, I'm stumped. There is no compression in either cylinder. Verified with new gauge. I can feel air coming from valve cover area. I removed the left head and cylinder base, and they look fine, great really. I was expecting a hole the the piston or cylinder wall cracked or broken/stuck rings. But since both cylinders have no compression I can't see them both failing overnight anyway.
So now it's disassembled and I have no clue why there is no compression. I was thinking of doing a leakdown test, but there is nothing to leak down.
Any ideas would be appreciated.
So now it's disassembled and I have no clue why there is no compression. I was thinking of doing a leakdown test, but there is nothing to leak down.
Any ideas would be appreciated.