Martin White Posted February 13, 2021 Report Share Posted February 13, 2021 Hi Folks Just about to put the head back on the block (in a very cold garage) I have noticed the payene gasket has one of the holes (I assume oil/waterway) is slightly blocked by the gasket not lining up correctly. I checked with the ajusa one I removed and it appears to be the same. Is this an issue does anyone know? Seems worse by number 1 cylinder and not so bad at number 4 Martin Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 13, 2021 Report Share Posted February 13, 2021 the gasket is probably more accurate as a die cut rather than a sand casting mould suppose you could trim/stamp out a better hole fit in the gasket Link to comment Share on other sites More sharing options...
Martin White Posted February 13, 2021 Author Report Share Posted February 13, 2021 Ok might be worth making a little larger. I assume this will not compromise gasket strength. There is quite a bit of material around it though thanks Martin Link to comment Share on other sites More sharing options...
rogerguzzi Posted February 13, 2021 Report Share Posted February 13, 2021 Hello Martin If it was me I get a rotary file to the block and chamfer the hole to suit the gasket! Roger Link to comment Share on other sites More sharing options...
Martin White Posted February 13, 2021 Author Report Share Posted February 13, 2021 Ok Thanks Roger. Surprised I didn’t notice it last time. Excuse my ignorance but is it an oil way? Link to comment Share on other sites More sharing options...
rogerguzzi Posted February 13, 2021 Report Share Posted February 13, 2021 Hello Martin The oil way is the one with the copper ring and that look fine Roger Link to comment Share on other sites More sharing options...
Martin White Posted February 14, 2021 Author Report Share Posted February 14, 2021 Ok 👍 Link to comment Share on other sites More sharing options...
Nick Jones Posted February 14, 2021 Report Share Posted February 14, 2021 I’d be extremely reluctant to remove any metal from the block, especially that close to the edge of the bore. The engine had managed 50 years or so as it is. Certainly would be looking at how the same gasket hole relates to the matching hole in the head - if there even is a matching hole in the head? Nick Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 14, 2021 Report Share Posted February 14, 2021 I wouldn't trim the block, just in case, but as for the gasket... can you lay both gaskets down, one on top of the other, and see how the holes line up? There should be a matching hole in the head, as Nick asks, but one thing, just out of curiosity - that other oil way to the right in the top photo appears to be sealed / blocked / uncut - I'm assuming that's normal but wondering why the gasket is cut at that point? Link to comment Share on other sites More sharing options...
DanMi Posted February 14, 2021 Report Share Posted February 14, 2021 I would guess the hole in the gasket that doesn't match a hole in the block is so that the gasket can be fitted either way withjout risk of blocking the oilway to the rockers Ah but that idea doesn't make sense as the gasket is marked top as it has the tab at the back Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 14, 2021 Report Share Posted February 14, 2021 That's why I was wondering; if it can't be reversed why go to the extra expense of cutting a hole and edging it in copper? Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 14, 2021 Report Share Posted February 14, 2021 solution is fit it in the dark then you have nothing to worry about Hmmm !!! Pete Link to comment Share on other sites More sharing options...
NonMember Posted February 14, 2021 Report Share Posted February 14, 2021 3 hours ago, Colin Lindsay said: If it can't be reversed why go to the extra expense of cutting a hole and edging it in copper? Because the earlier, non-recessed block, gasket could be fitted either way up, so the extra oil hole was needed on that, then just got carried over. Link to comment Share on other sites More sharing options...
Martin White Posted February 14, 2021 Author Report Share Posted February 14, 2021 The old gasket and the payene gasket holes line up perfectly. Martin Link to comment Share on other sites More sharing options...
rogerguzzi Posted February 14, 2021 Report Share Posted February 14, 2021 8 hours ago, Nick Jones said: I’d be extremely reluctant to remove any metal from the block, especially that close to the edge of the bore. The engine had managed 50 years or so as it is. Certainly would be looking at how the same gasket hole relates to the matching hole in the head - if there even is a matching hole in the head? Nick Hello Nick I just mean a chamfer to the gasket hole and top photo left-hand one is just as close! But would probably make no difference! Roger Link to comment Share on other sites More sharing options...
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