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Summit Racing Ford Small Block Engine Build Oil Drain Holes

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Oil drain holes are also radiused to improve return flow and get oil back to the pan quickly, especially once GE Glyptal coating is applied. Cylinder-head drain holes also need to be massaged for improved drain back.
347ci Small Block Build - Hammer Time! - Part 1

 Oil drain holes are also radiused to improve return flow and get oil back to the pan quickly, especially once GE Glyptal coating is applied. Cylinder-head drain holes also need to be massaged for improved drain back.  View Related Article

 

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