MF 135, Z134 engine clacking??

(quoted from post at 15:43:21 02/06/17) I bought a MF202 industrial with the Z134 engine about 15 years ago. Despite having a shiny new distibutor, it had the same symptoms you describe. My search for answers led me to a relationship with Yesterdays Tractors that continues till this day. At that time, there was a very knowledgeable fellow, Big Dean, who served as the defacto king of of the Massey board. He's since past, rest his soul, but not before helping many of us with our Massey problems. He had me check several things along the lines of which you already have, before declaring that the geared end of the camshaft (which engages the timing chain) was probably broken off. It is, to this day, a complete anathema as to how the darn thing could have run at all in such a condition, but he was correct. I had to remove the loader, split the tractor, and remove the timing cover to prove it. Symptoms were clacking and vibrating at the distributor, severe enough that removing the dust cover in the distro revealed metal shavings in the bottom. I would imagine listening on or near the front timing cover with a stethoscope would be informative. I came to believe the previous owner was well aware of the true nature of the problem and had slapped a new distro on just to sell it off. I ended up doing a complete overhaul and have had years of faithfull service from a machine that fits my needs well. Hope you find something less serious than what I describe, but it may be so.

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