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nhramnl · 06-09-2016, 03:19 PM

It's actually a small cup plug (on early Bowties I think it was .500 in diameter, on later blocks, .470. It is pressed in, and is under the rear main. I had an almost season-long problem failing cam bearings and lifters because the engine machinist removed the plug (to bottle-brush the oil galleys) and forgot to reinstall it. There was very little oil going up-top, and invariably, at least one of the cam bearings would turn. Finally got to the point where I said "No more bearings and camshafts and lifters, because it can't possibly be bad or improperly installed parts...again". We did a deep-dive for weird, uncommon problems and somebody who had experienced the same thing straight-out said "Your engine guy removed the plug and forgot to reinstall it".

06-09-2016, 03:19 PM	#8
nhramnl Senior Member Join Date: Feb 2010 Posts: 507 Likes: 8 Liked 358 Times in 83 Posts	Re: no oil at roller rockers It's actually a small cup plug (on early Bowties I think it was .500 in diameter, on later blocks, .470. It is pressed in, and is under the rear main. I had an almost season-long problem failing cam bearings and lifters because the engine machinist removed the plug (to bottle-brush the oil galleys) and forgot to reinstall it. There was very little oil going up-top, and invariably, at least one of the cam bearings would turn. Finally got to the point where I said "No more bearings and camshafts and lifters, because it can't possibly be bad or improperly installed parts...again". We did a deep-dive for weird, uncommon problems and somebody who had experienced the same thing straight-out said "Your engine guy removed the plug and forgot to reinstall it".