wallo Posted August 24, 2014 Report Share Posted August 24, 2014 Has anyone got any advice regards cam followers on a B25, I'm pretty sure I've got one sticking that releases then drops making a metal on metal sound, or they're touching each other, the noise is only there when the engine gets hot. Quote Link to comment Share on other sites More sharing options...
power175 Posted August 24, 2014 Report Share Posted August 24, 2014 maybe its the play on the valve tappets -power175 Quote Link to comment Share on other sites More sharing options...
wallo Posted August 24, 2014 Author Report Share Posted August 24, 2014 Thanks, can you please explain in more detail? Quote Link to comment Share on other sites More sharing options...
suzuki250 Posted August 24, 2014 Report Share Posted August 24, 2014 The B25 motor had a tendency to bend the rocker arm shafts when over revved, causing the tappet (rocker arm) to stick. causing problems like you have I had this happen a few times when I did moto-cross! Quote Link to comment Share on other sites More sharing options...
wallo Posted August 25, 2014 Author Report Share Posted August 25, 2014 Thanks, and this is where it starts to get complicated. I have a C15 to end on a B25 bottom end. Sounds like the engine is coming out again :-( Happy Bank Holiday Monday. Quote Link to comment Share on other sites More sharing options...
wallo Posted August 25, 2014 Author Report Share Posted August 25, 2014 So, spent a while in the workshop today and I think I've found the issue. After much read in it appear that the cam followers need be fitted in a certain way, the oil holes need to face the back of the engine, which was news to me. A lot of people said the noise could be oil starvation related, so if the engine warmed up and thinned the oil, and the holes were facing the front the rotation of the cam would spin the oil away rather that into the lobes. Which would explain the noise. Do this sound possible? Quote Link to comment Share on other sites More sharing options...
suzuki250 Posted August 25, 2014 Report Share Posted August 25, 2014 (edited) So, spent a while in the workshop today and I think I've found the issue. After much read in it appear that the cam followers need be fitted in a certain way, the oil holes need to face the back of the engine, which was news to me. A lot of people said the noise could be oil starvation related, so if the engine warmed up and thinned the oil, and the holes were facing the front the rotation of the cam would spin the oil away rather that into the lobes. Which would explain the noise. Do this sound possible? Yes, I’ve done that before! If you have a look they are tapered, when they are facing the wrong way the heel hits the cam a lot harder Just make sure that it hasn’t cracked the stellite faces Edited August 25, 2014 by suzuki250 Quote Link to comment Share on other sites More sharing options...
wallo Posted August 26, 2014 Author Report Share Posted August 26, 2014 Will put it back together tonight and report back, fingers crossed. Quote Link to comment Share on other sites More sharing options...
b40rt Posted August 26, 2014 Report Share Posted August 26, 2014 Good illustration in Rupert Ratio. Quote Link to comment Share on other sites More sharing options...
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