aoie Posted July 15, 2019 Share Posted July 15, 2019 I have a question on recent problem with water getting into 4th cylinder when engine heats up causing white smoke out the back. Compression test found nothing unusual so I removed the head and an inspection of the gasket only reveled a small pin hole near water passage that is extremely close to #4 cylinder wall. My question is what that water passage hole is for? And can I add additional plug or sealant to it since It appears to serve no purpose once the head is on, gasket seals it off . Andy Link to comment Share on other sites More sharing options...
Nick Jones Posted July 15, 2019 Share Posted July 15, 2019 Seems to be there specifically to promote head gasket failure - and works! Others have filled the hole. Previously discussed here Link to comment Share on other sites More sharing options...
aoie Posted July 16, 2019 Author Share Posted July 16, 2019 Thanks Nick for the previous discussion lead, that helped. My block fire ring recessions are not flush with the block head so it appears to also be a factor in the gasket leakage along with the spigot holes near the cylinder walls on 1 and 4 cylinders. New plan will be to resurface the block next winter to remove ring recessions, and to add plugs to the spigot holes to be cut flush at the same time. For now I'm just going to try up-rated cylinder head gasket and flange nuts. Last head gasket one was AL-cheapo version. Andy Link to comment Share on other sites More sharing options...
Nick Jones Posted July 16, 2019 Share Posted July 16, 2019 The flanged nuts from Minispares worked well for us - held the torque with ease. Link to comment Share on other sites More sharing options...
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