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Case 188d oil passages to rocker arm shaft

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PostPosted: Thu May 06, 2021 3:32 am    Post subject: Case 188d oil passages to rocker arm shaft Reply to specific post Reply with quote

I'm working on replacing my 188d engine block in my 530ck. I bought a used 188d engine and stripped it down to the block and it looks good so far. Pretty much everything looks identical to my existing block, however, I noticed that the oil feed from the block to the head is through the center rocker arm bolt on the engine that I bought and it is on the rear rocker arm bolt on the engine in my backhoe. When I replace my block with the one I bought, I would like to install my head onto the block that I bought but because the oil passages are in a different location there is no way to feed oil up to the rocker arm shaft. My question is, can I drill a hole through the bottom section of my head extending the center rocker arm bolt hole through the bottom of the head so that there is a passage way for oil to go up through the existing hole in the center of the block up through the head and through the hollow rocker arm hold down bolt to the rocker arm shaft? My concern with doing this is that I may be drilling through the coolant jacket in the head which would then result in coolant and oil mixing.
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