Settling in France, I would like to offer reconditioned heads on our web shop (exchange deals) + be able to fit proper reconditioned heads on rebuild engine which I’m getting my teeth it to, when all my home work and running around is sorted. After a very long time, we managed to find a decent engine builder and organized 8 heads to be re done. We supplied new valve guides, exhaust/inlet valves and new push rod tubes. Most tubes have damage to the tips. Common problem when DIY are replacing the push rod seals. Some tubes have pin holes half way up, most likely from hand tools. One head dropped on the floor and tube snapped in two. The firm cut the tubes to remove them and realized that a tube expander is needed to fit the new tubes correctly and gave up after looking at the Citroën work manual we supplied for them to see how to and to position the tubes spot on 71 mm from the face.
Got the heads back with a note sorry can’t do the tubes. There you go. Just come back from an engineers shop working with aluminium welding every day but he did shake his head when he discovered how skinny the tubes are. He spotted the difference in material straight away between the original and reproduction tubes but he’ll give it a go. I know next week what the outcome is and will post the result here, hopefully with a couple of photos.
Over the years I have exchanged and collected many heads with damaged tubes. I don’t believe in just getting another head from the shelf. I want to recondition and preserve old parts. In order words bring back old skills and not just become a spare parts exchanger. The more I can do the better I feel. I do know my limitations and will ask other skilled trade people when my ability stops. Same for gear boxes and engines. Most reconditioned engines and gear boxes are really low standard jobs but that another story.
Cheers
Viking bastard
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) and even Tig with gas purging there is likley to be stress cracks as the weld cools.....if you got a decent pool going in the first place"