Hello fellow riders and BMW tech experts,
I own a 2011 R1200GSA Twin Cam with 30,000 miles. Recently, I found the valves were out of spec and adjusted them. After that, the timing chain on the right cylinder started making a loud racket, similar to a dry start noise.
I suspected the timing chain tensioner and replaced it. Oil pressure is good, so no issues there. However, I noticed something concerning with the bottom timing chain guide—it physically moves up and down and hits the engine case when the engine is started.
Even rotating the engine manually reveals the same behavior: the bottom guide sits all the way to the bottom at a certain point in the rotation, leaving the chain completely loose on the upper guide. Then as I continue to rotate the engine, the guide and tensioner come up again and tightening the chain.
This doesn’t seem right and I’m worried something is seriously wrong. Has anyone experienced this before? Could it be a stretched chain or cracked guide?
Looking forward to hearing from you gents!
Thanks in advance!
I own a 2011 R1200GSA Twin Cam with 30,000 miles. Recently, I found the valves were out of spec and adjusted them. After that, the timing chain on the right cylinder started making a loud racket, similar to a dry start noise.
I suspected the timing chain tensioner and replaced it. Oil pressure is good, so no issues there. However, I noticed something concerning with the bottom timing chain guide—it physically moves up and down and hits the engine case when the engine is started.
Even rotating the engine manually reveals the same behavior: the bottom guide sits all the way to the bottom at a certain point in the rotation, leaving the chain completely loose on the upper guide. Then as I continue to rotate the engine, the guide and tensioner come up again and tightening the chain.
This doesn’t seem right and I’m worried something is seriously wrong. Has anyone experienced this before? Could it be a stretched chain or cracked guide?
Looking forward to hearing from you gents!
Thanks in advance!
