ditchy Posted August 9, 2016 Report Share Posted August 9, 2016 I'm after a BMC 1.8 cranlshafy pulley as I've taken mine off and it has a chip out of the keyway. It is approx 28 inner & 185mm outer diameter. Thanks in advanve. Link to comment Share on other sites More sharing options...
John Bean Posted August 9, 2016 Report Share Posted August 9, 2016 Hi ditchy Have you tried Calcutt Boats, they have loads of BMC bits Address: Tomlow Rd, Stockton, Southam CV47 8HX Phone: 01926 813757 Link to comment Share on other sites More sharing options...
ditchy Posted August 10, 2016 Author Report Share Posted August 10, 2016 Thanks. Ive tried there. Any other offers? Link to comment Share on other sites More sharing options...
magnetman Posted August 10, 2016 Report Share Posted August 10, 2016 Worth calling Chertsey Meads Marine (Google for phone number) they have recently helped a friend of mine out with parts for a BMC 2.5 Link to comment Share on other sites More sharing options...
Flyboy Posted August 10, 2016 Report Share Posted August 10, 2016 I'm after a BMC 1.8 cranlshafy pulley as I've taken mine off and it has a chip out of the keyway. It is approx 28 inner & 185mm outer diameter. Thanks in advanve. Plenty on Ebay. Link to comment Share on other sites More sharing options...
RLWP Posted August 14, 2016 Report Share Posted August 14, 2016 This is a pulley from a BMC 1.5/1.8. The key feature is that it is in two parts, separated by a thick rubber section. This allows the outer ring to damp out oscillations in the crankshaft by being connected through a flexible element. Opinions differ on if this is necessary, I'm inclined towards thinking that it is This is the problem with these pulleys: They develop a crack along the keyway. Ditchy's is worse than this with a piece falling out. As this is the surface that the oil seal runs on, it makes a terrible mess Now, if pulleys were easy to find, I would scrap this one. But they are nigh on unobtainable. I have just stripped the pulleys from three engines, and only one is OK So, we need a pragmatic solution, which is a Speed Sleeve: It's a precision made, thin walled sleeve intended to renew sealing surfaces. In this case, it will seal the crack and stop oil seeping out. It will also put a strengthening hoop around the spigot which will help hold it together. The sleeves come as a kit with a fitting tool: Which you put over the sleeve and fit it with a hammer: This is the fitted sleeve: And it's too long, and hardened, so it needs to be ground off: And there we are: Richard 3 Link to comment Share on other sites More sharing options...
Sea Dog Posted August 14, 2016 Report Share Posted August 14, 2016 This is a pulley from a BMC 1.5/1.8. The key feature is... etc, etc. Richard If that isn't the most helpful post I've ever seen, I don't remember what the better ones were! I don't have a BMC engine, but I might go and buy one just to ask questions about it now! Nice one, Richard, have a greenie. Link to comment Share on other sites More sharing options...
Mikexx Posted August 14, 2016 Report Share Posted August 14, 2016 Plenty on Ebay. There are a few MGB B series pulleys there, but are these the same as the BMC diesel? I was also told the 1.5 is different from the 1.8? Link to comment Share on other sites More sharing options...
RLWP Posted August 14, 2016 Report Share Posted August 14, 2016 There are a few MGB B series pulleys there, but are these the same as the BMC diesel? I was also told the 1.5 is different from the 1.8? I have had 1.5 and 1.8 pulleys side by side and I cannot see any difference Richard Link to comment Share on other sites More sharing options...
Mikexx Posted August 14, 2016 Report Share Posted August 14, 2016 I have had 1.5 and 1.8 pulleys side by side and I cannot see any difference Richard Thanks for that bit of info. I'm sure at the time I had phoned Calcutt some years ago or similar establishment and they advised against mixing the two. I might have misunderstood the details I was told. I found your repair of the pulley interesting to follow. How much was the Speed Sleeve? Link to comment Share on other sites More sharing options...
RLWP Posted August 14, 2016 Report Share Posted August 14, 2016 About £32. Not cheap, they are a precision item Richard Link to comment Share on other sites More sharing options...
Chalky Posted August 14, 2016 Report Share Posted August 14, 2016 The Americans on the MGexp forum swear by them as a way of helping keep oil in B series engines. There's a lot of discussion on MG forums about the harmonic damper/ pulley. General view of the expert engine builders is that without them engine life can be affected - racers having problems with broken cranks. They're available second hand from MG breakers. Link to comment Share on other sites More sharing options...
RLWP Posted August 14, 2016 Report Share Posted August 14, 2016 The Americans on the MGexp forum swear by them as a way of helping keep oil in B series engines. There's a lot of discussion on MG forums about the harmonic damper/ pulley. General view of the expert engine builders is that without them engine life can be affected - racers having problems with broken cranks. They're available second hand from MG breakers. And are they the same as the diesel pulley? Calcutt say they are unobtainable, so I would be surprised if the MGB one, which is very common, was the same Richard Link to comment Share on other sites More sharing options...
Mikexx Posted August 15, 2016 Report Share Posted August 15, 2016 So, we need a pragmatic solution, which is a Speed Sleeve: Which you put over the sleeve and fit it with a hammer: Without intending to appear anal, the SKF variety you have is Speedi Sleeve. I spent a while googling speed sleeve and got few hits. Just in case the photos disappear from this site, for reference, your part no. is SKF 99156. The idea of hammering this on, even with the tool, frightens me a little! I have a flypress and much prefer to apply pressure uniformly over the tool and perhaps slide the sleeve in one go. Link to comment Share on other sites More sharing options...
Horace42 Posted August 15, 2016 Report Share Posted August 15, 2016 The sleeves come as a kit with a fitting tool: Which you put over the sleeve and fit it with a hammer: I am not sure about hitting it with a hammer. Maybe as a last resort. But without a proper bench press it would be easy enough to make your own simple fitting tool. Take two large metal plates with a hole in the middle and a large diameter nut and matching (long enough) bolt. Pass the bolt through the plates and pulley and sleeve and tighten the nut.until the sleeve is squeezed onto the pulley. Link to comment Share on other sites More sharing options...
RLWP Posted August 15, 2016 Report Share Posted August 15, 2016 The sleeves come as a kit with a fitting tool: Which you put over the sleeve and fit it with a hammer: I am not sure about hitting it with a hammer. Maybe as a last resort. But without a proper bench press it would be easy enough to make your own simple fitting tool. Take two large metal plates with a hole in the middle and a large diameter nut and matching (long enough) bolt. Pass the bolt through the plates and pulley and sleeve and tighten the nut.until the sleeve is squeezed onto the pulley. Yew, you can do all of that if you want. Or follow the Speedi Sleeve instructions and use a hammer: http://www.skf.com/uk/products/seals/industrial-seals/power-transmission-seals/wear-sleeves/skf-speedi-sleeve/installing-skf-speedi-sleeve/index.html The sleeves are designed to repair shafts without removing them from machines, i.e. when you cannot use bench presses, hydraulic kit, vices or any other equipment Richard Link to comment Share on other sites More sharing options...
Flyboy Posted August 15, 2016 Report Share Posted August 15, 2016 And are they the same as the diesel pulley? Calcutt say they are unobtainable, so I would be surprised if the MGB one, which is very common, was the same Richard Do you have a part no. for the 'Diesel' pulley ? Link to comment Share on other sites More sharing options...
RLWP Posted August 15, 2016 Report Share Posted August 15, 2016 Do you have a part no. for the 'Diesel' pulley ? Sorry, no. There is a number cast into the pulley, it doesn't match the parts lists. We checked with an MG specialists Richard Link to comment Share on other sites More sharing options...
Chalky Posted August 15, 2016 Report Share Posted August 15, 2016 (edited) Sorry, no. There is a number cast into the pulley, it doesn't match the parts lists. We checked with an MG specialists Richard On my 18V engine the pulley has 12H963 cast into it. This is a 1979 petrol b series. On the Moss website they list 3 pulleys. 1 without a damper (1962 - 3) 12H773, 12963 (64 - 70) and 12H3515 (1970 - 4). Main difference is where the timing marks are, apparently all are interchangeable ( on petrol at least). Edited August 15, 2016 by Chalky Link to comment Share on other sites More sharing options...
RLWP Posted August 15, 2016 Report Share Posted August 15, 2016 On my 18V engine the pulley has 12H963 cast into it. This is a 1979 petrol b series. Do you have any dimensions of that pulley? Richard Link to comment Share on other sites More sharing options...
Chalky Posted August 15, 2016 Report Share Posted August 15, 2016 (edited) Do you have any dimensions of that pulley? Richard Apparently it's 5 1/8" http://www.mossmotors.com/graphics/products/PDF/433-696.pdf 75 - 80 had a larger pulley apparently. http://www.mgexp.com/phorum/read.php?1,2735548 Edited August 15, 2016 by Chalky Link to comment Share on other sites More sharing options...
Horace42 Posted August 15, 2016 Report Share Posted August 15, 2016 Yew, you can do all of that if you want. Or follow the Speedi Sleeve instructions and use a hammer: http://www.skf.com/uk/products/seals/industrial-seals/power-transmission-seals/wear-sleeves/skf-speedi-sleeve/installing-skf-speedi-sleeve/index.html The sleeves are designed to repair shafts without removing them from machines, i.e. when you cannot use bench presses, hydraulic kit, vices or any other equipment Richard Yew, you can do all of that if you want. Or follow the Speedi Sleeve instructions and use a hammer: http://www.skf.com/uk/products/seals/industrial-seals/power-transmission-seals/wear-sleeves/skf-speedi-sleeve/installing-skf-speedi-sleeve/index.html The sleeves are designed to repair shafts without removing them from machines, i.e. when you cannot use bench presses, hydraulic kit, vices or any other equipment Richard Great! - if there is room to swing a hammer - boat engines are likely to be too close to the bulkhead to use a hammer. Link to comment Share on other sites More sharing options...
Flyboy Posted August 17, 2016 Report Share Posted August 17, 2016 This is a pulley from a BMC 1.5/1.8. The key feature is that it is in two parts, separated by a thick rubber section. This allows the outer ring to damp out oscillations in the crankshaft by being connected through a flexible element. Opinions differ on if this is necessary, I'm inclined towards thinking that it is This is the problem with these pulleys: They develop a crack along the keyway. Ditchy's is worse than this with a piece falling out. As this is the surface that the oil seal runs on, it makes a terrible mess Now, if pulleys were easy to find, I would scrap this one. But they are nigh on unobtainable. I have just stripped the pulleys from three engines, and only one is OK So, we need a pragmatic solution, which is a Speed Sleeve: It's a precision made, thin walled sleeve intended to renew sealing surfaces. In this case, it will seal the crack and stop oil seeping out. It will also put a strengthening hoop around the spigot which will help hold it together. The sleeves come as a kit with a fitting tool: Which you put over the sleeve and fit it with a hammer: This is the fitted sleeve: And it's too long, and hardened, so it needs to be ground off: And there we are: Richard Excellent repair, however I would be concerned that with a cracked keyway of that magnitude how long it will go before it fails. Link to comment Share on other sites More sharing options...
Horace42 Posted August 21, 2016 Report Share Posted August 21, 2016 Thanks. Ive tried there. Any other offers? Did you find one? Link to comment Share on other sites More sharing options...
David Mutch Posted August 23, 2016 Report Share Posted August 23, 2016 If that isn't the most helpful post I've ever seen, I don't remember what the better ones were! I don't have a BMC engine, but I might go and buy one just to ask questions about it now! Nice one, Richard, have a greenie. Seconded! You may just have saved me some head scratching when I finally get my pulley off to renew the oil seal. Thanks! Link to comment Share on other sites More sharing options...
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