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Old 05-23-2019, 08:01 PM
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Should be steel allen pipe plug, very light amount of sealer like #2 Permatex or Edelbrock Gasgasinch, Permatex High Tack, or RTV silicone sparingly.

Following the oil diagram, you've got rear cam bearing and/or main bearings next on the oil path....if rear cam bearing isn't installed deep enough, it leaves the annular groove on the bearing bore exposed...huge leak when that happens....I've seen that on the SBC before. Oil leaks back to behind cam and floods out forward through the two drain holes in the rear cam journal of the camshaft.....a huge flood right back to the pan.

coffee can test was how we found it on the small block.
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