Richard71 Posted April 1, 2020 Report Share Posted April 1, 2020 Hello All, I'm hoping someone can shed some light here. A couple of years ago I bought what I was told was a TR6 crankshaft, I've since had it re-ground & balanced and I chance a look at the part number, 311313. I can't find this number in any of the usual suppliers parts book. So does anyone know to which engine it may have originated? Richard. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 1, 2020 Report Share Posted April 1, 2020 That is the forging part number of 311322 the short backed TR6 crank. - Also fitted in Triumph 2.5 PI, 2500 and 2500 S Quote Link to post Share on other sites
Richard71 Posted April 1, 2020 Author Report Share Posted April 1, 2020 31 minutes ago, BlueTR3A-5EKT said: That is the forging part number of 311322 the short backed TR6 crank. - Also fitted in Triumph 2.5 PI, 2500 and 2500 S Thanks for that, though I can't seem to find part# 311322 anywhere on the crank? Quote Link to post Share on other sites
RogerH Posted April 1, 2020 Report Share Posted April 1, 2020 Hi Richard, very few components would have the part No' cast in them. The foundry do their thong and that is usually that. I think the four pot crank does have it P/No. but b=not seen it much else anywhere Roger Quote Link to post Share on other sites
Richard71 Posted April 1, 2020 Author Report Share Posted April 1, 2020 Thanks Roger, I just wanted to satisfy my curiosity. The crank obviously fits in the block and has the correct stroke (already had a dummy build). Richard. Quote Link to post Share on other sites
Andy Moltu Posted April 1, 2020 Report Share Posted April 1, 2020 This thread is getting a bit bizarre Roger in a thong and Richard stroking it! Quote Link to post Share on other sites
Oddball Posted April 1, 2020 Report Share Posted April 1, 2020 3 minutes ago, Andy Moltu said: This thread is getting a bit bizarre Roger in a thong and Richard stroking it! I’m sure they will both be very happy together. Cameron Quote Link to post Share on other sites
RogerH Posted April 1, 2020 Report Share Posted April 1, 2020 I don't know any thongs. I can't thing. Roger Quote Link to post Share on other sites
JochemsTR Posted April 2, 2020 Report Share Posted April 2, 2020 (edited) 13 hours ago, Richard71 said: I'm hoping someone can shed some light here. A couple of years ago I bought what I was told was a TR6 crankshaft, I've since had it re-ground & balanced and I chance a look at the part number, 311313. I can't find this number in any of the usual suppliers parts book. So does anyone know to which engine it may have originated? That's how mine looked....actually all of them I have seen have some kind of identification... Edited April 2, 2020 by JochemsTR Quote Link to post Share on other sites
TRsixchris Posted April 2, 2020 Report Share Posted April 2, 2020 Just checked my spare shortback crank and it has the casting number 311313 it definitely came out of a TR6 but these days who knows where it came from originally. There is a "TR6" crank for sale on eBay at the moment which looks very much like a 2 litre crank. It has a simplex timing gear and a casting number that looks like it begins with 308. Chris Quote Link to post Share on other sites
Fireman049 Posted April 2, 2020 Report Share Posted April 2, 2020 Quote Link to post Share on other sites
saffrontr Posted April 2, 2020 Report Share Posted April 2, 2020 Looks to have similar markings to the original crank on my TR6, CP54529-O, apart from mine having 17740D2 rather than the 17740J of Fireman049's cheers Derek Quote Link to post Share on other sites
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