Clean Out Oil Feed Restrictors in Heads

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Pitted Cam Lobe

Upon teardown my camshafts showed significant pitting on lobes. Brucem
Response was:

'This was clearly caused by the oil flow restrictors in the heads being blocked with debris, in this case chewed up chain limiters. The rest of the engine was in stunning condition, so the lesson is fit the correct oil filter, and let the engine warm up before you rev it so as not to open the oil bypass in the filter.

  • Take the heads off
  • Clean out the 5 (five) holes in each of the 4 restrictors.