I think I’m right in saying that the oil return is down the chain ’chest’. Not the hole going from block to head, thats the oil feed under pump pressure, that’s why it leaks oil, too much pressure at too high revs. Keep the speed down, no leaks!
Interesting video Mike. Thanks. As a Sunbeam owner I was interested in the cure to the oil leak on the near side. I think building up that bit of joint face was a good idea and it looks good but I am not sure it will stop the oil leak. In my experience the oil finds it way out from that oilway to the cambox that you put a screw in. The oil is under pressure and it can be very difficult to seal that properly. I managed to stop mine leaking with a bit of 7mm od plastic pipe (say 2") with an operating temperature of 200c inserted in that oil way between head and block. Then to be doubly sure I fitted a Viton O ring over the pipe. I use a Stewarts composite gasket. That has done the trick!.
Acetone. I was in the RAF and a painter that I knew at RAF Leconfield was very skillful with a cloth and acetone, A scratch on my car and he made it look so simple to give it a rub and as you say voila scratch gone. He said there was a fine line between removing the scratch and the car needing a respray.
you are right about to much heat on the fin. a tack on the outside ends of the fin first may have helped . no place for the heat to go. you do a great job!
I'm not an expert tig welder, and even less so on old cast alloy, but I'd be looking at impurities in the alloy, lack of a good gas shield and a less than stellar earth to the bit of fin. Personally I'd have wanted a copper heat sink under the bit being replaced as well. But anyway, the jobs done and looks good enough to me.
A friend also advised that I use a heatsink for all thin welding. I think that this one was a combination of everything that you mentioned plus the cool block.
A Brit here who ran an MG restoration shop told me that with British bikes because of the accent, people would think that I knew what I was doing even when I didn't.
Very appropriate...., my head is ok, but the fins on the crankcase are damaged / chunks missing due to levering, I guess not undoing the bolt hidden at the back behind the cam chain. Can you give advice on the alloy piece you used to repair? Years ago I did the same thing with a Moto Guzzi repairing a broken fin, but used fins off an old Guzzi Barrel which was scrap. I need to source the right metal for this job on my S7, any advice would be great, thanks. PS still have the old Guzzi barrel if that could be used. Last time I did this I cut out a cardboard 'mock up' but the welder who does the works gets 'twitchy' if I ask him to source the metal for the repair. Thanks
![ลองสุ่มไอโฟน 990 โกงมั้ย? [ โกงมั้ยครับ ep.101 ] | DOM](http://i.ytimg.com/vi/bfsWe0j492k/mqdefault.jpg)
I think I’m right in saying that the oil return is down the chain ’chest’. Not the hole going from block to head, thats the oil feed under pump pressure, that’s why it leaks oil, too much pressure at too high revs. Keep the speed down, no leaks!
I like the lorries going by during the sped up portion. They sound like Kenny Roberts on a TZ750!
Interesting video Mike. Thanks. As a Sunbeam owner I was interested in the cure to the oil leak on the near side. I think building up that bit of joint face was a good idea and it looks good but I am not sure it will stop the oil leak. In my experience the oil finds it way out from that oilway to the cambox that you put a screw in. The oil is under pressure and it can be very difficult to seal that properly. I managed to stop mine leaking with a bit of 7mm od plastic pipe (say 2") with an operating temperature of 200c inserted in that oil way between head and block. Then to be doubly sure I fitted a Viton O ring over the pipe. I use a Stewarts composite gasket. That has done the trick!.
Acetone. I was in the RAF and a painter that I knew at RAF Leconfield was very skillful with a cloth and acetone, A scratch on my car and he made it look so simple to give it a rub and as you say voila scratch gone. He said there was a fine line between removing the scratch and the car needing a respray.
you are right about to much heat on the fin. a tack on the outside ends of the fin first may have helped . no place for the heat to go. you do a great job!
Another nice job Mike.
I'm not an expert tig welder, and even less so on old cast alloy, but I'd be looking at impurities in the alloy, lack of a good gas shield and a less than stellar earth to the bit of fin. Personally I'd have wanted a copper heat sink under the bit being replaced as well. But anyway, the jobs done and looks good enough to me.
A friend also advised that I use a heatsink for all thin welding. I think that this one was a combination of everything that you mentioned plus the cool block.
another masterpiece and a reference to tommy cooper does it get any better.
If ever the videos suddenly stop it might be because I have been taken away in a white van. I can't stop talking to myself .
You sound like a Geordie to me Mike .. what’s the story? Love your videos 👍
mike, i bet the yank's love you, brit bikes/ brit enginner, life doesnt get much better.
A Brit here who ran an MG restoration shop told me that with British bikes because of the accent, people would think that I knew what I was doing even when I didn't.
Very appropriate...., my head is ok, but the fins on the crankcase are damaged / chunks missing due to levering, I guess not undoing the bolt hidden at the back behind the cam chain. Can you give advice on the alloy piece you used to repair? Years ago I did the same thing with a Moto Guzzi repairing a broken fin, but used fins off an old Guzzi Barrel which was scrap. I need to source the right metal for this job on my S7, any advice would be great, thanks. PS still have the old Guzzi barrel if that could be used. Last time I did this I cut out a cardboard 'mock up' but the welder who does the works gets 'twitchy' if I ask him to source the metal for the repair. Thanks
I just used 6061 aluminium alloy. I should think that the Guzzi fins would be fine.