triumphlux Posted February 13, 2018 Share Posted February 13, 2018 Hi, I restored my Mini for the 3rd time in 20 years. Its my classic to use during the winter and I did a few upgrades this time to try to keep up with the moderns. The engine is a 1293 ccm which had been done 15 years ago (45.000 km) so we pulled it apart and fitted new shells, oil pump, timing chain etc. It also got a flowed cylinderhead , high lift rockers, an LSD and adjustable suspension From the first time I started the car it has a loud 'tapped' noise coming from the rear of the engine. All the parts are sourced from a friend who builds A-series engines for 30 years and together we were unable to find the fault ..... We changed the rockers back to the original setup, no difference. I checked without the rocker cover, no difference. I took the valves springs from th last 4 valves off the check, everything is fine I fitted new pushrods and screws, no difference. The car goes really well and rews up to 5.500 without a problem. So if you have any ideas what it could be, please let me know. JC 20180113 (2).MOV Link to comment Share on other sites More sharing options...
oldtuckunder Posted February 13, 2018 Share Posted February 13, 2018 is the tapping noise at rpm speed or half rpm speed, sorry cant play video says its going to take 3 hours to download? Alan Link to comment Share on other sites More sharing options...
Nick Jones Posted February 13, 2018 Share Posted February 13, 2018 I can download (how slow is your connection Alan?) but not play it - some codec issue? If suspecting it is valve train noise (hanging tappet?) you could try temporarily reducing the valve clearances to zero and seeing if it shuts up. Nick Link to comment Share on other sites More sharing options...
oldtuckunder Posted February 13, 2018 Share Posted February 13, 2018 30Mb Symmetric, but I suspect I was trying to play streamed and it was encountering trouble decoding hence the time estimate. Well actually I had gone off on a tangent after trying to track down a sharp tapping noise at the end of last season which turned out to be hole in collector in manifold, so was wondering as everything was running all right if it could be something stupid like blowing plug or manifold, hence half rpm or full rpm timing. Alan Link to comment Share on other sites More sharing options...
triumphlux Posted February 14, 2018 Author Share Posted February 14, 2018 I uploaded the video on YouTube which should make it easier to actually see it https://youtu.be/LwDDr2s3g_k. JC Link to comment Share on other sites More sharing options...
Nick Jones Posted February 14, 2018 Share Posted February 14, 2018 Hmm........ does sound a bit like a manifold blow especially right at the end...... Nick Link to comment Share on other sites More sharing options...
triumphlux Posted February 19, 2018 Author Share Posted February 19, 2018 Hi, I checked the manifold for cracks as well as a blowing gasket but everything is fine .... Will continue driving the car and time will tell. JC Link to comment Share on other sites More sharing options...
RedRooster Posted March 3, 2018 Share Posted March 3, 2018 What kind of manifold is it an LCB? you haven't wrapped it have you? Link to comment Share on other sites More sharing options...
triumphlux Posted March 21, 2019 Author Share Posted March 21, 2019 Well, after much searching we didn't find out what was wrong ….. so we decided to drive the car and see what happens After less then 1.000 km it finally broke down late one evening with a load BANG …. The engine stopped itself and the gearlever linkage was stuck. So engine/gearbox out and dismantling to check what went wrong. Link to comment Share on other sites More sharing options...
triumphlux Posted March 21, 2019 Author Share Posted March 21, 2019 Something is stuck between the gears and gearbox housing ….. g Guess what it was JC Link to comment Share on other sites More sharing options...
Hamish Posted March 21, 2019 Share Posted March 21, 2019 A socket ? Link to comment Share on other sites More sharing options...
Nick Jones Posted March 21, 2019 Share Posted March 21, 2019 Piece of cam follower......? Can’t tell from the pic so I really am guessing! Your emoji is grinning so hopefully no bad damage? Link to comment Share on other sites More sharing options...
triumphlux Posted March 21, 2019 Author Share Posted March 21, 2019 A socket bouncing between gearbox and engine would probably not last as long Nick is correct, the lower part of one cam follower broke into 3 pieces which got eventually smashed by the camshaft and fell into the gearbox housing … The damage is quite bad BUT not terminal. One piece got between the diff gear to gearbox gear so that needed to be changed and the gearbox housing has got a hole so that needed changing too The cam is toast as well as the timing gear! You can also see that the follower got crashed by the cam to he engine block and that needed careful filing so that the upper part from the follower left would come out. But I managed to save the block and the new follower moves freely Link to comment Share on other sites More sharing options...
triumphlux Posted March 21, 2019 Author Share Posted March 21, 2019 (edited) The gearbox has already been rebuild in to one of the freshly sodablasted housings. Looks way too good to put in the Mini that I use during the winter! The engine will get fixed next week. JC Edited March 21, 2019 by triumphlux Link to comment Share on other sites More sharing options...
Nick Jones Posted March 21, 2019 Share Posted March 21, 2019 Hmmm, bad enough. Was that cam follower changed at the last rebuild or is it from the original build? If from the original..... why now?! Link to comment Share on other sites More sharing options...
triumphlux Posted March 21, 2019 Author Share Posted March 21, 2019 We didn't change camshaft or followers as everything was (or seemed to be) in perfect condition. Less then 50.000 km in ten years on this engine. We changed the bearing shells and oil pump as well as a new modified head. Why it happened now I don't know. Link to comment Share on other sites More sharing options...
Nick Jones Posted March 21, 2019 Share Posted March 21, 2019 Most odd. Most irritating! Link to comment Share on other sites More sharing options...
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