wimpus Posted December 29, 2021 Report Share Posted December 29, 2021 Hi all, I've never seen this.. Found out that the 200.000mile/325.000km engine im rebuilding had a cracked pushrod (no.1) Going to replace all 8 (suspect metal fatigue) by used ones or new ones. But would thrust old ones more then new.. Link to comment Share on other sites More sharing options...
Pete Lewis Posted December 30, 2021 Report Share Posted December 30, 2021 glad you spotted that its done its bit no idea if new are better or not but a thought.............. these bed into the follower so that may have some damage inside its mating surface Pete Link to comment Share on other sites More sharing options...
wimpus Posted December 30, 2021 Author Report Share Posted December 30, 2021 1 hour ago, Pete Lewis said: glad you spotted that its done its bit no idea if new are better or not but a thought.............. these bed into the follower so that may have some damage inside its mating surface Pete Will have a look at no1 cam follower. But as im rebuilding the engine fully it will be renewed anyway. Link to comment Share on other sites More sharing options...
JohnD Posted December 30, 2021 Report Share Posted December 30, 2021 Wimpus, Is that a tubular push rod? There seems to be a joint below the head, and that the head has belled the end of the tube. Is this rod shorter than the others? Are they all the same length? John Link to comment Share on other sites More sharing options...
Ian Smith Posted December 30, 2021 Report Share Posted December 30, 2021 I would suggest swopping them out. As Pete has said, if you suspect damage to the camshaft, check it over, and, if you have doubts or evidence, then change it also. And, not forgetting, tappets as well. It's better to be on your safe side. Link to comment Share on other sites More sharing options...
wimpus Posted December 30, 2021 Author Report Share Posted December 30, 2021 20 minutes ago, Ian Smith said: I would suggest swopping them out. As Pete has said, if you suspect damage to the camshaft, check it over, and, if you have doubts or evidence, then change it also. And, not forgetting, tappets as well. It's better to be on your safe side. As i pointed out.. It will all be replaced. Got a canley 25/65/1 (mk3 for 1500)camshaft to go in. New followers (ofcourse). Etc Link to comment Share on other sites More sharing options...
wimpus Posted December 30, 2021 Author Report Share Posted December 30, 2021 34 minutes ago, JohnD said: Wimpus, Is that a tubular push rod? There seems to be a joint below the head, and that the head has belled the end of the tube. Is this rod shorter than the others? Are they all the same length? John All are the same length, did check that to last night. Link to comment Share on other sites More sharing options...
ahebron Posted December 31, 2021 Report Share Posted December 31, 2021 It does make you wonder how many Triumphs or any car are running around with cracked pushrods. If you don't pull it out and examine it thoroughly then you wont know it has a problem Like the doctor said to me when I went to see him about blind spots in my left eye (stroke in the eye) I am one of the lucky ones who has it in my vision so what caused it can be treated. Plenty of people have this problem but it is not in their vision so dont know they have a problem. Link to comment Share on other sites More sharing options...
Pete Lewis Posted December 31, 2021 Report Share Posted December 31, 2021 pushrods do take a lot of up down round and round hard usage and agree most of the bits you dont see are just not/never seen they do wear into the inside of the follower and should be used as matched pairs agree with what can you see , the best part of varifocals is at a glance its fine then under the readers its stuffed keep taking the pills and happy new year if thats possible dont forget with new followers to do the bedding in initial start up and redjust the tappets when the followers and new pushrods have bedded in after a good few 100 miles Pete Link to comment Share on other sites More sharing options...
daverclasper Posted December 31, 2021 Report Share Posted December 31, 2021 4 hours ago, Pete Lewis said: they do wear into the inside of the follower and should be used as matched pairs I thought the followers also wear to the cam lobes?. If so, then if replacing followers, then cam shaft needs replacing as well? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted December 31, 2021 Report Share Posted December 31, 2021 I would hope that it's along the 'sacrificial' line of 'camshaft doesn't wear but follower does', in order to bed in. It also wears on the inside to suit the profile of the pushrod, which is why they should be kept as pairs. The camshaft lobes do wear but at a slower rate, being hardened. We take the rocker assembly off the engine more often than we remove the followers but I always numbered those too, in order to have them back in the right place again. Link to comment Share on other sites More sharing options...
Pete Lewis Posted December 31, 2021 Report Share Posted December 31, 2021 a follower can wear concave , as they rotate on each lift this can pluck the edge of the cam lobe if the lobe is good you are not in camshaft replacement mode if the edge of the lobe looks a bit bird sh1t and plucked edges its got to be replaced along with followers its an area of intense wear , nothing lasts for ever its a look see then decide Pete Link to comment Share on other sites More sharing options...
Peter Truman Posted December 31, 2021 Report Share Posted December 31, 2021 what's the thoughts on the cam bucket/follower having a drain hole in it, the original Stanpart item was a closed bucket sp was full of oil with the pushrod end fully immersed in it. I notice some go faster aftermarket buckets are drilled so that the excess oil can drain out, experts thoughts on this option please. good or bad? Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 1, 2022 Report Share Posted January 1, 2022 i suppose a drain hole reduces the weight /inertia all this up and down activity uses a lot of energy !!! Pete Link to comment Share on other sites More sharing options...
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