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Hi,
Yes, the crankshaft turns all the belts through the inner rubber sleeve.
You should hear some rumble or slight squeal and squeaking if the harmonic balancer is shot.
If the pulley has come loose on the crankshaft shaft, this can look the same because the belts are holding on to it.
How long ago was the timing belt replaced?
You seem pretty proud of the longevity of components on this car.
The pulley has a nice fit up on the shaft and that makes it possible.
It will not take much forward movement for it to become disconnected from a timing belt sprocket.
It has front or rear protruding keys to make up engagements.
The running rough part maybe due to a tooth location being off or out of time with number one cylinder and or the timing of the overhead camshaft.
I would not advise running it, anymore than necessary, in this condition.
You don’t want the timing sprocket to crack as that will happen soon if this is your problem.
The sprocket is made from sintered metal that will not take strain in any wrong direction.
They cost about $30 and are offered just because of this kind of malfunction.
Yep, this thing needs a bit of investigation very soon!
Phil
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