RLWP Posted October 17, 2016 Report Share Posted October 17, 2016 An occasional series on an unusual engine... I've just had the block of this engine stitch welded to remove a long frost crack. It's a process I have heard of, this is my first experience of having this done: I'm very impressed! Richard Link to comment Share on other sites More sharing options...
tree monkey Posted October 17, 2016 Report Share Posted October 17, 2016 An occasional series on an unusual engine... I've just had the block of this engine stitch welded to remove a long frost crack. It's a process I have heard of, this is my first experience of having this done: I'm very impressed! Richard Ok why that method, rather than what I would consider a normal looking weld? Link to comment Share on other sites More sharing options...
RLWP Posted October 17, 2016 Author Report Share Posted October 17, 2016 (edited) Welding cast iron is hard because it is a brittle material. If you just run a weld, as the bead cools, it puts the surrounding metal into tension and cracks it. There is an alternative method, which is to get the area to a red heat, then weld it. Richard Edited October 17, 2016 by RLWP Link to comment Share on other sites More sharing options...
tree monkey Posted October 17, 2016 Report Share Posted October 17, 2016 Welding cast iron is hard because it is a brittle material. If you just run a weld, as the bead cools, it puts the surrounding metal into tension and cracks it. There is an alternative method, which is to get the area to a red heat, then weld it. Richard Ok I didn't know that was cast, I am aware cast is not easy to weld, I can see the point now, thanks Link to comment Share on other sites More sharing options...
RLWP Posted October 17, 2016 Author Report Share Posted October 17, 2016 It is a beautiful casting. I'll take a picture of the whole thing tomorrow I can't work out how they managed to cast it without the front falling off Richard Link to comment Share on other sites More sharing options...
matty40s Posted October 17, 2016 Report Share Posted October 17, 2016 Who did the stitch welding?? Link to comment Share on other sites More sharing options...
RLWP Posted October 17, 2016 Author Report Share Posted October 17, 2016 (edited) Metalock in Coventry: https://www.metalock.co.uk/ This is watchmaking compared to their usual jobs: https://www.metalock.co.uk/on-site-services/on-site-machining.aspx Richard Edited October 17, 2016 by RLWP Link to comment Share on other sites More sharing options...
MtB Posted October 17, 2016 Report Share Posted October 17, 2016 Very, very nicely nicely done. Thank you Richard. Link to comment Share on other sites More sharing options...
RLWP Posted October 17, 2016 Author Report Share Posted October 17, 2016 Very, very nicely nicely done. Thank you Richard. Amazing, isn't it Richard Link to comment Share on other sites More sharing options...
X Alan W Posted October 18, 2016 Report Share Posted October 18, 2016 An occasional series on an unusual engine... I've just had the block of this engine stitch welded to remove a long frost crack. It's a process I have heard of, this is my first experience of having this done: I'm very impressed! Richard Way back early 60's the water jacket on my "Seffle" was frost cracked,( that way on purchase) a friend of mine was one of the first (as far as I know) to take on the method of repair which AFAIK was then a sort of franchise,he continued for many years & did many repairs & didn't hear of any failures & the "Seffle" still going in Jem bates"s boat Link to comment Share on other sites More sharing options...
Bee Posted October 18, 2016 Report Share Posted October 18, 2016 Cor, wish I could do that. I've seen that done on a big fly press, perfect. Link to comment Share on other sites More sharing options...
RLWP Posted October 18, 2016 Author Report Share Posted October 18, 2016 Cor, wish I could do that. I've seen that done on a big fly press, perfect. So do I! Richard Link to comment Share on other sites More sharing options...
Tacet Posted October 18, 2016 Report Share Posted October 18, 2016 Nice. Was this a cold process? Not trying to be klever. but when it is cold, I thought it just "stitched" and not "welded" so I am interested to know if there are other processes. Link to comment Share on other sites More sharing options...
RLWP Posted October 18, 2016 Author Report Share Posted October 18, 2016 Nice. Was this a cold process? Not trying to be klever. but when it is cold, I thought it just "stitched" and not "welded" so I am interested to know if there are other processes. I wish I knew the answer! Richard Link to comment Share on other sites More sharing options...
Dorman Posted October 18, 2016 Report Share Posted October 18, 2016 Nice job Richard Worth considering for my small bell-housing hole do you think? Simon Link to comment Share on other sites More sharing options...
Nightwatch Posted October 18, 2016 Report Share Posted October 18, 2016 (edited) One of these car make over programmes had an engine block stitched. An old MG if I remember. I think they showed the process. I 'think' the programme is/was Car SOS or summat. Martyn Edit. Just looked it up. Car SOS. Channel 4. I think it was a MGA. Edited October 18, 2016 by Nightwatch Link to comment Share on other sites More sharing options...
jake_crew Posted October 18, 2016 Report Share Posted October 18, 2016 (edited) Brilliant - I'm glad to see you making progress. I hope you're not lifting too many of those nice light Gleny bits with your mended hand Richard. Edited October 18, 2016 by jake_crew Link to comment Share on other sites More sharing options...
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