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Discussion in 'GS Boxers' started by rdasilva, Dec 21, 2016.
Was that posted here? I don't recall any issues like that.
Hmmm...I'd like to know more about this "erratic bang" noise. At idle, my 15GSA seems to have a kind of crunch noise sporadically, and the RPM seems to drop with it ever so slightly.
Yes, on a few '16 models. Bad cam hardening batch. My dealer mech showed me a cam from a '16 in for that: lobe was grooved by 1/8 inch+! Oddly, he said it ran fine
Yikes, somehow I missed that, or mentally blocked it!
Doesn't seem to be very wide spread thankfully!
Yup, what desmo said. Bike ran great aside from tappy valve noise.
I don't know. I've had 3 of these things and none sounded like that. (14-15-16). I'd just get it checked. Last time I had one checked was the thunder gray 2014 at 10k miles and it was fine. It cost me $50 because the shop was doing a winter labor special for $50 per hour.
Pretty much sounds like my 16 and it doesn't worry me. And, I'm really anal retentive.
Sounds exactly like my '14 has sounded for the last 65,000 miles. I've needed shims at a few of my major services, but the service techs never seemed to think it was anything crazy.
I once had an issue with my 1150GS. Turned out to be nothing, but there was a point where I was suspecting a top-end issue. A local motorcycle repair shop advertised that they worked on BMW's, so I stopped to get a second opinion. Told him what it was doing, which was smoking on acceleration sometimes. Told him the age and mileage. (02 with 85k). First he suggested that the smoke might be coolant. I gave him the 'you're an idiot' look and reminded him that a BMW boxer is air cooled. Then he said that it might be worn out rings, and with the mileage it probably isn't worth fixing. Said he'd have to pull the motor to get to the cylinders, and the labor would be more than the bike is worth. I asked if he was one of the mechanics, he said yes. I told him to go read a book about motorcycles and walked out.
Point being, if someone isn't a BMW person I generally don't listen much when this kind of stuff comes up. Hell I've been riding for 20 years and I couldn't even check oil on this damn bike without the assistance of this site.
This is exactly what happened to me on my 15' R1200GSW. Took it in for the 6K service, they did the service and when they started it up the technician immediately shut it down. He came out told me I had excessive engine noise. I had him take off the vavle covers and sure enough the cams had deep grooves in them on the right cylinder. Not near as bad on the left side. Everything was fixed under warranty. After it was all fixed they said some of the 15's had soft cams. They said this was only the second one they've seen. I did ask them about metal getting into the motor and for what it's worth they told me the oil filter and magnetic plug would catch everything. Funny thing is I asked them at the 600 mile service that I thought the engine was noisy. The service writer ask me what I had and I told him and he reply was that year is a little noisier than most. So I just rode it. I didn't notice and difference in performance except it was starting to pop a little under deceleration. For peace of mind pop off the vavle cover and look. Here's a pic of my right side cylinder.
That's some serious wear on a cam lobe! I readily agree that they (BMW) have a temporing/hardening issue with their camshafts. I've seen this in a rare automobile engine with a lot of mileage on the motor. Ouch! Hopefully the metal lost from cam lobe was readily collected in the filter and not presented to the oil pump, oil-gallies or ultimately to the babbit on the main bearings. I hate seeing this type of a failure on anyone's ride. $$$ in repair.
can you please advise what oil was used in that motor.
That is no oil problem. No oil would prevent a poorly hardened cam from wearing like that. No oil would cause it either.
That would account for a low HP special. Someone was telling me yesterday some of the BMW sport bikes had a soft cam problem. I just bought a 16' I believe it was built in late 15' hopefully no issues. However there are so many in existence we are likely to see a few of the issues since it's usually the problem ones we see on the net.
Sorry it happened to you. I believe I would do a couple of early oil changes just to be sure there is no ground up debris coming out.
He was joking.
(I found it funny.)
Don't be so sure with pistole!
That cam lobe is groovy!
The dealership used Advantec 5W-40W. They admitted that some cams that didn't get hardened. Bummer for sure
Arrrrrrggghhhhhhhhhh ! you mean it wasn't Rotella ?