Didn't want to hear this

I'd hazard a guess you're 100% right.......

Filled up the oil & went for a ride. The Tappet noise has gone !

Thanks to all for the help getting this puzzle figured out.

Nah, this is the thing, it wasn't a tappet noise. My guess is that there was insufficient oil being delivered to fill the tensioner reservoirs and therefore the plungers were incapable of pumping up. Result? Tensioners blades threshing about like crazy under the influence of the chains as they loaded and unloaded.

Hopefully there was sufficient getting to the bottom end and cam bearings. It's the big ends that are most critical. Cams run at half crank speed so stresses on the oil wedge are generally lower.

Pete

Hard to tell.

The only further comment is that since replacing the RH camchain plunger, now when I start the bike for the count of 1, 2, 3 there is a hard tap tap noise, which goes away as the oil pump builds pressure. This is different from the problem noise.

That's just the time it takes for the tensioner to prime up. Some are worse than others. I can only surmise due to manufacturing tolerances.

Thats what I believe. However I think it is a different noise to the problem noise.

Glad I found this thread!!

Have the exact same symptoms on my bike...
Knocking noise when hot after a restart mostly or sitting at a red light.
It's not constant though, so it eventually disappear until I shut it off and restart 10/15 minutes later
The oil light comes on at times (rare) but only stays a second or two max, so I figured it was oil starvation of some sort and blame the oil pump and the fact that the bike hit the ground hard on Dec 2015 during my wreck?
I put 2000 miles on the bike since the wreck and the noise started 300 miles ago. Currently have 14K miles total.

So all I need is the sump gasket?
I want to trade this thing for the rosso one eventually...

It's the gasket between the sump spacer & the crankcase.

Wasn't too hard to get to. Took me longer to take the bike to the dealer & then get it back !

Did your oil light ever come on?

No. The oil light behaved normally.

Grisonut wrote:

Did your oil light ever come on?

Your oil light should never come on with a running engine, I would want to find out why it lights up before driving the bike again..

I kinda feel the same way but I saw it come on 3 times to be exact and it only stays for about a second, almost a blink.
So I'm not worry yet but I just don't like that noise when it comes on so the bike is parked anyway until I get the gasket and if it doesn't cure the problem, I'm trading this thing for sure!

Nobleswood wrote:

I didn't realise the tensioner could cause such problems. I'll have a look Monday night.
Thanks

When my right side tensioner went tits, it made it sound like a bearing rap on the right side. It happened especially after the motor was good and hot. Comparing the old tensioner in my hand to the new one was telling. There was very little tension when squeezing it compared to the new part. FWIW, my Stelvio was always noisier on that side, so my thought is that it was probably a weaker tensioner than the left side from the get go.

It's still kind of noisy (more than other new Stelvio's I've listened to) for the first second after starting, and I wonder if my cam chains are stretched out a bit at 85,000 miles.

I'll be doing the clutch over the winter, so I'll check them then.