Oil and smoke in right-side exhaust

[Kevin Werner]

So this fix may have worked and I’m pretty surprised. Did both the intake and exhaust on the offending side. Process was easy thanks to the guides from members. I’m still getting what seems like a sooty residue after starting when cold but I think it’s a tuning issue or old oil burning off from the older leak.

I went with a set of VM34s and don’t have any experience with them yet buts another thread.

It has been written on this forum somewhere that 180 mains and 25 pilots are a good starting point for VM34s.

 

[atom4488]

Lack of knowledge and carelessness.
It's quite common to seat the seal then ram the valve up through the guide with scant attention paid to safeguarding the lip of the seal as the collet groove passes it.
First thing you know about it is on start-up and it smokes like a bandit. There's no short-cut but to re-do it again, and if you're unlucky your engine won't be one that allows in-situ access to the seal like shown above.
I always put the valve through, then put a piece of polythene over the stem before putting the seal down, that way it's protected.
Never had one fail, and have been especially careful of the Viton seals because of the cost of them.

I recall buying valve stem seal kits (for a BMW M10 engine, I think) that included a thin plastic cap (like half of a medical capsule) that was intended to be installed over the collet grooves specifically for that reason.