Martin OD Posted December 21, 2022 Report Share Posted December 21, 2022 Hi all. My cylinder head is cracked and I need a replacement. I have a few feelers out but any advice where I can source a good one is appreciated. It is a 2000 L mark 1 1967. Link to comment Share on other sites More sharing options...
Josef Posted December 21, 2022 Report Share Posted December 21, 2022 Canley’s list refurbished 6 cylinder heads for the SC range at £460 ish with a £75 surcharge (I don’t know if these were shared with the 2000?). Have you tried all the usual suspects for good / used / refurbishable? Fitchetts (who may well even have a NOS one!), Spitfire Graveyard, Spitbitz, Chic Doig etc. Link to comment Share on other sites More sharing options...
johny Posted December 21, 2022 Report Share Posted December 21, 2022 Out of interest Martin wheres the head failed? Link to comment Share on other sites More sharing options...
Martin OD Posted December 21, 2022 Author Report Share Posted December 21, 2022 Hi. Canleys can get one but it is a 2 or 3 month wait. Hopefully I can find one a bit quicker than that. I am not sure where the head has failed. I need to get it back to see myself. Link to comment Share on other sites More sharing options...
Nigel Clark Posted December 21, 2022 Report Share Posted December 21, 2022 1 hour ago, Martin OD said: Hi. Canleys can get one but it is a 2 or 3 month wait. Hopefully I can find one a bit quicker than that. I am not sure where the head has failed. I need to get it back to see myself. Most likely failure point is between the inlet and exhaust valve seats. That said, it's an unusual failure on these engines, unless larger valves have been fitted or there's been a badly fitted hardened exhaust valve seat insert for unleaded. Nigel 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted December 21, 2022 Report Share Posted December 21, 2022 back in the 70s when after work we worked wonders in moonlight servicing a family friend had a smart polished Mk1 2000 it had blown the head between 3 and 4 a lump was missing ,and my inception to stuck head studs we took the head to the factory and my man on welding did a invisible repair filled the break and faced it all that went on for many years till sold , pete Link to comment Share on other sites More sharing options...
Martin OD Posted December 21, 2022 Author Report Share Posted December 21, 2022 The plot thickens. The crack is adjacent to the inlet valve guide. I haven't seen it myself yet but I will investigate further when I get it back. Looking at the photos I am not convinced. Link to comment Share on other sites More sharing options...
JohnD Posted December 21, 2022 Report Share Posted December 21, 2022 Martin, have you noticed the probable crack in line with the valve seat mark, on the surface for the rocker cover? PS, I might be able to supply a 2L cylinder head, if you have to go that way. Link to comment Share on other sites More sharing options...
PeteH Posted December 21, 2022 Report Share Posted December 21, 2022 IF it was mine I would have the area Dye-Penetrant tested?. Even better is X-Ray, but that is a relatively expensive commercial test. Dye Pen is obtainable online, from multiple source`s. Pete Link to comment Share on other sites More sharing options...
Martin OD Posted December 21, 2022 Author Report Share Posted December 21, 2022 My job is Dye Penetrant but looking at the photo is looks a casting imperfection. I will need to see it when it gets back from the machine shop. 1 Link to comment Share on other sites More sharing options...
Martin OD Posted December 21, 2022 Author Report Share Posted December 21, 2022 There are many imperfections all over the head but I need to it in real life as opposed to a photo. Link to comment Share on other sites More sharing options...
thescrapman Posted December 22, 2022 Report Share Posted December 22, 2022 21 hours ago, Nigel Clark said: Most likely failure point is between the inlet and exhaust valve seats. That said, it's an unusual failure on these engines, unless larger valves have been fitted or there's been a badly fitted hardened exhaust valve seat insert for unleaded. Nigel Sadly not unusual on MK1 2000 heads. cracks between exhaust and inlet. I have 3 or 4 on shelf, all cracked, same place. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted December 22, 2022 Report Share Posted December 22, 2022 Same as the GT6 heads. Link to comment Share on other sites More sharing options...
johny Posted December 22, 2022 Report Share Posted December 22, 2022 Surprising as would have thought mk2 head would be most at risk or maybe Triumph learnt the lesson and paid special attention when increasing the size of the valves... Link to comment Share on other sites More sharing options...
Martin OD Posted December 22, 2022 Author Report Share Posted December 22, 2022 Have you ever tried getting them welded. I am not so sure myself although according to a previous post his was ok. This was where I would expect them to be cracked, not in the location I have. Link to comment Share on other sites More sharing options...
johny Posted December 22, 2022 Report Share Posted December 22, 2022 I believe cast iron is notoriously difficult to weld as for one thing the item has to be highly heated. Ive seen large castings metal stitched (drilling and special lock wedges hammered in) in preference to welding... Link to comment Share on other sites More sharing options...
PeteH Posted December 23, 2022 Report Share Posted December 23, 2022 8 hours ago, johny said: Ive seen large castings metal stitched (drilling and special lock wedges hammered in) in preference to welding... Metalock. I`ve see huge Marine Engines, Repaired in this fashion, even Crankshafts. https://www.metalockengineering.com/en/metalock-engineering-uk-limited/ There are specialist(s) who can weld a Cylinder head, I`ve seen traction Engine parts re-welded, it being very likely to need machining afterwards, and all new guides too. I suspect the cost will (at least) compete with a replacement and /or second hand head though.? Pete Link to comment Share on other sites More sharing options...
Pete Lewis Posted December 23, 2022 Report Share Posted December 23, 2022 get this from Chris Witor mk1 2000 head £50 Chris Witor Triumph Specialist Link to comment Share on other sites More sharing options...
JohnD Posted December 23, 2022 Report Share Posted December 23, 2022 I expect that such difficult and skilled work will be expensive, but necessarily so with large ships or traction engines, when a replacement is even more expensive or just not available. If you do have a cracked head, then another would not be hard to find. And I expect a lot cheaper! 1 Link to comment Share on other sites More sharing options...
Martin OD Posted January 16, 2023 Author Report Share Posted January 16, 2023 HA. The head was not cracked after all. The engineer was mistaken. I am now looking for the short cylinder head studs part no Stud - Short - 133803 which seem to be out of stock anywhere and so if anyone has qty 7 can they give me a shout. Link to comment Share on other sites More sharing options...
JohnD Posted January 17, 2023 Report Share Posted January 17, 2023 I'm amazed. See my post above. Link to comment Share on other sites More sharing options...
PeteH Posted January 20, 2023 Report Share Posted January 20, 2023 TBF, I am not actually that surprised?. Hence my suggestion to have it crack tested. I know from (embarassing) experience that not all "defects" are actually that. Having had (costly) X-Ray examination carried out on Steam Boiler on one occasion. Fortunately my HO Engineer was "on my side".!! Anyway, relief I am sure, best of luck with the studs. Without checking the spec: could longer one`s be shortened?. Pete. Link to comment Share on other sites More sharing options...
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