Thanks Sugar Bear, I forgot to mention replaced the water pump too, when I had the engine on a stand. I took the car apart 4 years ago, put the engine on a stand, and went through it, replacing gaskets on things like the oil filter, and replacing oil cooler lines, and oil pan gasket, and measuring timing chain stretch, a bunch of stuff. Then I painted the engine bay, and put the engine back in the car while I worked on the rest of the car, I drove it a short bit then but for the most part in the past 4 years, it's been started now and then to go in and out of the garage, on those times I didn't just push it.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.