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The engine came out at the end of March and was sent in for a rebuild. At this point I really shouldn't be considering something costing $5000 but dammit, I'm going to stay committed to this car.
Several things were noticed.
1- While it was in for a block rebuild, it was found that even though I had the head sent separately to be rebuilt in 2020, that machine shop did a "refresh", not a "rebuild". Other than the stem seal umbrellas and redressing the valves in their seats no other work was done and it was found that the valves and their stem seals were all badly worn, so we opted to rebuild the head again and put all new parts in it.
2- Bearing surfaces looked okay. They were original to the engine but there was no signs of serious problems
3 - Pistons had light scuffing, so a rebuild was indeed time
4 - Camshaft had bad wear on the fuel pump eccentric. When I measured the lobes for abnormal wear I found the lobes at the front of the engine were visibly smaller than the lobes at the rear of the engine. They were not wiped out, so I'm not sure what happened there.
I asked for all the used parts back so I could examine them myself and to catch any issues (also I wanted to save the water pump because it only has 40000km on it). As it turns out they almost threw out my pump-to-manifold coolant hose and while I found my old block heater in the box I don't see mention of a new one on the invoice, so I'll verify with them again on Tuesday because it's WAY easier to install the block heater that lives under the manifolds with the engine out of the car.
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