My valves are (really) noisy

[Barry]

Tony,

I was only going off what was said on ADVrider about the hardening. There is a reference about the need to harden at post #31 in this thread.

http://advrider.com/index.php?threads/angular-wear-on-rocker-tips.1050796/page-2

[Tony Smith]

Tony,

I was only going off what was said on ADVrider about the hardening. There is a reference about the need to harden at post #31 in this thread.

http://advrider.com/index.php?threads/angular-wear-on-rocker-tips.1050796/page-2

Barry thanks for that, all I can say, in my less than humble opinion, they are wrong. However I guess we can simply monitor the forum of a year orr so when the OP comes back complaining how much the weld-up, grind to shape and harden process cost on his rocker.

[Julio A.]

Ok, I don't remember doing any aligning of a oil passage when I installed the rockers. Does the shaft have a hole of some sort that I align somewhere?

The off centre holes or punch marks shown here in the end of the rocker shafts are the external indicator of correct orientation for the internal oil holes.

Barry, I opened my valve covers and saw that all of my rocker shafts have no punch marks or any discernible markings on them.

I did pull them off to ensure that the diagonal hole is on top of the and assembled everything back in place. All of them are in the right orientation when I took them out.

The surface that pushes the valve looks pretty nice and smooth to me.

[Barry]

That's odd because BMW actually issued a service bulletin to point out the punch marks.

[Julio A.]

The mystery goes deeper. Hahaha
I took a photo since I was also very surprised too. While I was there, I checked the valve clearances, they're still the way I left them.

Oh, and there was a little surface rust on the exhaust valve even though it was oil coated when I opened it. Weird considering I use the R65 everyday.

[tunnelrider]

The Clymer states the punch marks exist on 1980 - on rocker shafts.  The donor heads I'm using are from a 1980 motor and don't have punch marks either, but, as you already know Julio, you've got it right with the rocker shaft oil holes at the top.

[georgesgiralt]

Hello !
On my '82 R65, the shafts have a small punch point on them. You are able to miss it if not careful enough.
So maybe yours  are so small you missed them ?

[Bob_Roller]

I think the ' rust ' may be exhaust residue from the exhaust valve guide .

[Julio A.]

The Clymer states the punch marks exist on 1980 - on rocker shafts.

Manufacturing date on my Bike was 07/80, I think theses were the first 2nd gen (1981-up) bikes that rolled out of the factory. Maybe they used up the old rocker shafts before switching on to the newer ones?

I think the ' rust ' may be exhaust residue from the exhaust valve guide .

I have the same weird discoloration on the exhaust side on the other half of the engine. Does this mean my valve guides needs replacement already?

[Tony Smith]

I think the ' rust ' may be exhaust residue from the exhaust valve guide .

In which case they are way overdue for a refurb.