TRnorm Posted November 24, 2015 Report Share Posted November 24, 2015 Some advice please guys. I need to re-torque my head (well not my head). To remove the rocker assembly, is it usual practice to slacken off the tappets before removing the rocker shaft? Or is it OK to leave the tappets as they are, and progressively undo the rocker shaft pedestal nuts in turn (say half a turn or 1 turn at a time). Thanks Norman Quote Link to post Share on other sites
Motorsport Mickey Posted November 24, 2015 Report Share Posted November 24, 2015 Yes but no more than a couple of revolutions a time, same when replacing, rocker shaft will accept that level of stress. Mick Richards Quote Link to post Share on other sites
TRnorm Posted November 24, 2015 Author Report Share Posted November 24, 2015 Thanks Mick - and may I now ask a supplementary question? This will be the second re-torque since running in, and the reason is that I suspect that my original 500 mile torque down was at too low a figure. Its only been a couple of hundred miles since the first re-torque and I don't see any signs of gasket blow and of course this time I will be double double checking the wrench calibration. Having said that..Is there any reason anyone can think of why a second torque down is not a good idea.? Clearly I don't want to replace the gasket unnecessarily. Thanks Norman Quote Link to post Share on other sites
Motorsport Mickey Posted November 24, 2015 Report Share Posted November 24, 2015 Nope, just ease the nuts back one flat to release any stiction (the threads deform on the studs and nuts and need realigning) and also there is a degree of torque required to overcome the friction of nut on the washers. Then having set your accurate torque wrench at 105 lb ft tighten the nuts up in one smooth movement until the torque wrench clicks off or indicates 105 (there will not be much movement over the one flat you've released them if you were anywhere near the correct torque). Mick Richards Quote Link to post Share on other sites
TRnorm Posted November 24, 2015 Author Report Share Posted November 24, 2015 Thanks Mick, I feel much more confident about it now. Norman Quote Link to post Share on other sites
stuartmac Posted November 25, 2015 Report Share Posted November 25, 2015 Hi what's the best approach when the rocker shaft has been stripped and rebuilt - I need to roughly set the rockers so that when I turn the engine I can what is closing and opening etc. Does installing each adjuster about 3 full turns sound about right? Quote Link to post Share on other sites
peejay4A Posted November 25, 2015 Report Share Posted November 25, 2015 (edited) Don't risk it. Slacken them all right off then watch the tops of the pushrods to tell you which valves are opening. Then run through the gap setting twice. Edited November 25, 2015 by peejay4A Quote Link to post Share on other sites
Motorsport Mickey Posted November 25, 2015 Report Share Posted November 25, 2015 +1 with Pete's thoughts. Mick Richards Quote Link to post Share on other sites
stuartmac Posted December 2, 2015 Report Share Posted December 2, 2015 Hi all A quick answer would be much appreciated Just had my rocker assembly rebuilt by a well known specialist - does it look right to you I think he has got it all back to front The push rods are jammed against the openings and the tips seem to be missing the valve tops (its not bolted down in the photo) Regards Stuart Quote Link to post Share on other sites
Guest ntc Posted December 2, 2015 Report Share Posted December 2, 2015 No Assembled incorrect. Quote Link to post Share on other sites
stuartmac Posted December 2, 2015 Report Share Posted December 2, 2015 Thanks. Back we go! Quote Link to post Share on other sites
stuart Posted December 2, 2015 Report Share Posted December 2, 2015 Thanks. Back we go! So who`s the specialist as they obviously arent. Stuart. Quote Link to post Share on other sites
peejay4A Posted December 2, 2015 Report Share Posted December 2, 2015 At least he's consistent. Every rocker is wrong. Quote Link to post Share on other sites
nigethomas Posted December 3, 2015 Report Share Posted December 3, 2015 Shocking !!!! Quote Link to post Share on other sites
RogerH Posted December 3, 2015 Report Share Posted December 3, 2015 It can get embarrassing when you put tags like 'specialist', 'expert' etc on people. When at BA I was sometimes referred to as an expert. I would always correct them and say it was my day job - slightly tongue in cheek!! Everybody is allowed a mistake - except goalkeepers Roger Quote Link to post Share on other sites
Motorsport Mickey Posted December 3, 2015 Report Share Posted December 3, 2015 Correct we all make mistakes and it's forgivable, brain fade doing too many jobs at once etc. However what can't be forgiven is when the rocker shaft was fitted after assembly ( I presume the specialist had fitted it previously ?) the miserable attempt at rocker shaft assembly is obvious and should be picked up instantly. Makes me wonder if the job hadn't been delegated to a very inexperienced junior mechanic, but even then if he was my apprentice he'd get his ear clipped for letting that get through. Mick Richards Quote Link to post Share on other sites
RogerH Posted December 3, 2015 Report Share Posted December 3, 2015 Hi Mickey, I think Stuart has done the trial fit as it is not bolted down. Stuart - give yourself a clip round the ear Roger Quote Link to post Share on other sites
TR 2100 Posted December 3, 2015 Report Share Posted December 3, 2015 Bit confused between the comments from Roger, Mickey and Stuart. Care needs to be exercised when mentioning problems with any garage, give them the chance to answer, perhaps, but this example is horrendous. AlanR Quote Link to post Share on other sites
stuartmac Posted December 3, 2015 Report Share Posted December 3, 2015 Hi The assembly was dropped off for a rebuild and collected three weeks later (2 weeks longer than anticipated) I got it home and dropped it over the studs - it was clearly wrong Sometimes you doubt yourself - so I checked on the forum before I went back to the specialist When I dropped it off initially I opened with the conversation starter "could you take a look at this for me please " as I placed the assembly on the bench I got the reply "yes - its a rockers assembly" - so much for customer engagement!! On my return I placed it on the bench again - the guy said - "back again - is there a problem" "You tell me" I said "your the specialist" Anyway - he couldn't - in the end I told him. The explanation was that the two sets of new rockers has been labelled the wrong way round on the packaging!!!!! I had previously considered myself lucky that TR Bitz were just round the corner should I require their services - now their location is irrelevant! Anyway - the assembly definitely needing rebuilding (cracked and deformed pedestals, loose and damaged bushes) but the loud tick is still there I have run the engine without the rocker cover - the rockers are pretty much silent - it sounds like its coming from the tappets themselves but I cant believe they would be this vocal, the distributor is also under suspicion, I have ordered a stethoscope which should help find the noise Regards Stuart Quote Link to post Share on other sites
Lebro Posted December 3, 2015 Report Share Posted December 3, 2015 When you find out where the "tick" is coming from, let me know - mine does the same, & so does another members engine which has just been re-built ! Bob. Quote Link to post Share on other sites
rcreweread Posted December 3, 2015 Report Share Posted December 3, 2015 Stuart - are you sure the all the rockers are properly seated in the top of each push rod "cup" - I didn't think it was possible for them not to be, but it is, as I found to my cost - it made a really noticeable " clackety" noise when running - end result was fortunately only a knackered push rod in that the cup ended up with an extra smaller cup in the side of the original one - difficult to explain but hopefully you will know what I mean. I couldn't believe I made such a stupid mistake! Still we live and learn all the time! Cheers Rich Quote Link to post Share on other sites
RogerH Posted December 3, 2015 Report Share Posted December 3, 2015 Hi Stuart, remove the push rods and give them a shake (next to your ear) - there could be something inside the hollow tube. Roger Quote Link to post Share on other sites
Motorsport Mickey Posted December 3, 2015 Report Share Posted December 3, 2015 Check the followers for free movement in the bores from end to end in case they are JUST sticking at one position. Mick Richards Quote Link to post Share on other sites
stuartmac Posted December 3, 2015 Report Share Posted December 3, 2015 Hi thanks - three good bits of advice to check - though I am not sure what is meant / how to check the third one Check the followers for free movement in the bores from end to end in case they are JUST sticking at one position. Quote Link to post Share on other sites
RogerH Posted December 3, 2015 Report Share Posted December 3, 2015 Hi Stuart, wedge something down the follower and lift it through its full travel. Roger Quote Link to post Share on other sites
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