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I had to remove the head in my 1994 850NA due to a broken valve. I have owned this car since new, and always used dyno oil. I was surprised to find that piston, rings, camshafts and valve lifters looked like new. No visible wear . Cylinder walls still show original polishing markings. Only thing that had was not perfect was exactly only one rod bearing on Cyl 2 that had some scratches that could be felt if you passed the finger nail on it. So I decided to replace them and also the piston rings for reassurance. And of course, oil sump o-rings and water pump ( which by the way wsa the original one, with no evidence of leaks or wear).
Icelandic
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