Hi,

I know what you are talking about as I have seen the keyway in the hub not line up with the outer portion of its zero mark or to the timing mark on the plastic cover.
Unfortunately I’m not at the right house to just go over and pick one up that’s laying around and lay a protractor on it.
So just off hand I would say it has to be off the keyway by the distance of what is off the vertical slant of the engine in the one direction plus wherever they wanted the zero mark to be to the right of that.

I’m sure they set it up as a visual thing more than anything.
The span of degrees to the left is BTC and one would think or guess in my case, it would be set over like 45 degrees. Heck, it could be 90 degrees but I do not recall it being that much. Maybe 22.5 🥴

I think we need some help from our 200 series guru Art Benstein as he has been looking into these Volvos from the inside out for many years. So much so I bet he has it documented somewhere in a photo!
If not, if he sees this, it might be!😊

The paint line across the face of the hubs is a nice trick for an instantaneous peek down there.
It gives you confidence that wherever you are in line of sight with a mirror or under the car with the belly pan off it it’s still tight.

I’m not exactly sure why it’s on this engine to begin but then I don’t know much of why or how much of something it’s supposed to do.
As best I can figure from what I have read that it reduces a harmonic resonance or vibration of a crankshaft flexing down its length under certain conditions? Maybe with A/C compressors?

We have been aware of the shenanigans done with rubber bushing on the accessories.
I have to think that the whole rubberizing of them was uncalled for.

In the case of our powered accessories, sloppy fitting alignments cannot be an ideal situation on that two part rubberized driven crank shaft pulley either.

Just where was any resonance is coming from?
I’m aware that stationary diesel engines having crankshafts a lot longer than this little four banger but sure do turn a lot less speed. Here we go with speed of things again..
Maybe I’m a Classic over thinker at work. Jeez.
But it’s what it is.
Depending on what IS is?
I heard that someplace before.
🤔🤫😊

Phil

Hello Richard,
I'm envious of the 1985 245, a handsome car for sure. Sounds like you're doing a thorough job of keeping it in good order.

So once again, I'm here to provide my $.02 without actually knowing the answer to your question. I don't know why, since better answers will be forthcoming. Probably an ego thing... Anyway, here's my thought: From what I have read, when a HB fails in this fashion, it's not a small, one time slip. They tend to slip a lot, and keep slipping. So presuming the car was running well before the TB service, and you haven't moved the distributor, static timing the engine should reveal the problem, should it be present. If it's close, then mark the inner and outer rings with paint or something, and run it. If the marks separate over time, you'll know there's an issue.