daverclasper Posted June 23, 2018 Report Share Posted June 23, 2018 Hi. Rocker cover off today to sort a noisy tappet (Thanks for feeler tip, with engine running Pete Lewis, worked a treat). I did notice that the first 6 rockers did not have oil dribbling out of the top holes (in the past there was none coming from 2,3 and 4 rockers, so this has got worse). There is oil between the valves and rockers and it pools in the recesses at the top of the push rod holes on the top of the head. Engine has good oil pressure, according to the gauge so assuming it's sludge in shaft. Should I be bothered by this as maybe getting worse and clean out the shaft. If so the end caps look like they a held by some sort of pin, that looks like the tops have maybe been peened, though a bit difficult to see. I gather engine flush not a great idea (and would it clean the shaft) on an old engine that appears to have some sludge deposits and can disturb and block passageways ?. Any help great, thanks, Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 23, 2018 Report Share Posted June 23, 2018 yes its a mills pin 500975 , it should punch out ok. you can use a split pin if you wreck it a roll pin would work and easier to source what gets choked is the hole from the bore scroll to the head of the rocker if you strip it down photo or sketch which way each handed rocker and springs / washers faces if the shaft is stuffed they only seem to sell shafts for mk2 engines its too long and needs some careful modifications to fit one, the end cap for the ils way has to be tapped and a setscrew and washer used to replace the mk2 end caps got that tee shirt mk 1 shaft is 204736 not 214562 ( mk2 )shown by some Pete Link to comment Share on other sites More sharing options...
Gadgetman Posted June 24, 2018 Report Share Posted June 24, 2018 I got a 1600 one from James Paddock, for interest the ones at that place near Lincoln were undersize, worse than the worn one I took out! Paddocks were spot on size. http://www.jamespaddock.co.uk/rocker-shaft-16002-litre-mk1-3 Link to comment Share on other sites More sharing options...
daverclasper Posted June 24, 2018 Author Report Share Posted June 24, 2018 Thanks a lot. Maybe a silly question, but could the mills pins be tapped out with shaft in situ, and shaft successfully cleaned?. Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 24, 2018 Report Share Posted June 24, 2018 you wont remove all the rockers without stripping the shaft down as the pedestals will be in the way if you only want to remove an end rocker , well suppose it will tap out with a hard punch but i would suggest you give it a full overhaul and check all the rocker scrolls and feed holes . pete Link to comment Share on other sites More sharing options...
daverclasper Posted June 24, 2018 Author Report Share Posted June 24, 2018 Cheers Pete. A sooner, rather than later job?. I have a few longer mileage trips planned in next couple of months. Thanks, Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 24, 2018 Report Share Posted June 24, 2018 yes better to do it fully when the suns gone in Pete Link to comment Share on other sites More sharing options...
Gully Posted June 24, 2018 Report Share Posted June 24, 2018 I had a similar problem with my GT6, albeit with only one dry rocker - made the decision to change the rocker shaft and didn't regret it as the one I removed was quite heavily scored. The replacement came from Moss, complete with end caps. Gully Link to comment Share on other sites More sharing options...
daverclasper Posted June 29, 2018 Author Report Share Posted June 29, 2018 Thanks. Think I might attempt this soon, as don't have to use the car for a few days. Only ever worked on OHC heads before, so some questions please. I understand the pedestal nuts have to be undone a bit at a time, I assume because of valve spring tension. No mention of doing them up like this?. Also, can those end cap pins be tapped our from either end (of the pin) or are they tapered etc?. Was thinking, soak the rockers in petrol, then flush with brake cleaner, a bit of firking about with wire if needed?. Any snags I should prepare for as need to turn it over asap. Any help great, thanks Dave Link to comment Share on other sites More sharing options...
NonMember Posted June 29, 2018 Report Share Posted June 29, 2018 I always tighten them a bit at a time, concentrating on the ones that are opening valves first, if you see what I mean. I've not done the end caps so I'll leave that to someone else. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 29, 2018 Report Share Posted June 29, 2018 Part list calls it a Mills pin these are a parallel hard pin some have a small groove to let air out in solid blind holes It should punch out either way, as I said its ok to use a split pin of the right size if a replacement is needed it does not take a lot of loading These pins can be quite tight , I say split pin as if a refitted mills is a bit used /loose it can fall out and thats trouble Pete Link to comment Share on other sites More sharing options...
daverclasper Posted June 29, 2018 Author Report Share Posted June 29, 2018 (edited) Thanks Pete and non member. Very useful. Hopefully straightforward!. Dave Edited June 29, 2018 by daverclasper Link to comment Share on other sites More sharing options...
daverclasper Posted June 30, 2018 Author Report Share Posted June 30, 2018 Hi. I assume the end cap seals the oil further in than holes for pin, therefore would the split pins used on the front wheel bearings be ok ?(Vitesse engine). thanks, Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 30, 2018 Report Share Posted June 30, 2018 no idea it needs to be a nice fit not loose , the oil sealing is probably why its solid pin ?? im sure the old pin will work ok Pete Link to comment Share on other sites More sharing options...
daverclasper Posted July 2, 2018 Author Report Share Posted July 2, 2018 Hi. Are the toes of the cam lobes/contact with followers, lubed only by oil from the rockers running back down the pushrod holes please. Thanks, Dave Link to comment Share on other sites More sharing options...
NonMember Posted July 2, 2018 Report Share Posted July 2, 2018 The cam lobes are splash lubricated. Some of that is what runs down the side of the followers but there's some general oil mist in the surrounding area from the big ends flailing around. Link to comment Share on other sites More sharing options...
daverclasper Posted July 3, 2018 Author Report Share Posted July 3, 2018 Hi gadgetman. Did your end caps come off easily?. If I need to replace them for any reason, then I can only see Vit Mk 2 ones, that are a different part no. Thanks, Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 3, 2018 Report Share Posted July 3, 2018 Canley have them to order 104838 £5.10 Dont think you need to worry too much about doing this , it should just tap off, or fall off Pete Link to comment Share on other sites More sharing options...
daverclasper Posted July 3, 2018 Author Report Share Posted July 3, 2018 Cheers Pete. Dave Link to comment Share on other sites More sharing options...
daverclasper Posted July 3, 2018 Author Report Share Posted July 3, 2018 It escaped me on canley site. I don't think it shows up on the parts diagram for 2 Litre ( or maybe it was me). Yes, it's on Vitesse 6 diagram. Thanks again. Dave Link to comment Share on other sites More sharing options...
daverclasper Posted July 5, 2018 Author Report Share Posted July 5, 2018 Hi. Probably being over cautious here, though in the factory WS manual for rocker shaft fitment, it says something like. " Screw in the rocker adjuster screws fully before fitting, to avoid possibility of bending pushrods and tighten each pedestal nut a bit at a time". I assume to take load of the shaft?. Is this necessary?. Thanks, Dave Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 5, 2018 Report Share Posted July 5, 2018 Dave I would read that to unscrew to increase the tappet gap before fitting but as you are not replacing rockers just cleaning oilways Its not anything to bother about, just do your tappet gap checks on finishing off. Yes pull the pedestals down evenly locate all the tappet screws in the push rods as you, go. Do keep all rockers and pushrods in their original places they all wear and bed in to each other so best kept as matched pairs Pete Link to comment Share on other sites More sharing options...
daverclasper Posted July 6, 2018 Author Report Share Posted July 6, 2018 Cheers Pete. Dave Link to comment Share on other sites More sharing options...
daverclasper Posted July 10, 2018 Author Report Share Posted July 10, 2018 (edited) Hi. Have got one end cap off (which I'm assuming is enough to clean shaft) and stripped the shaft. The cap pin is disintegrating a bit and left some swarf behind, so I will not re-use. I have a split pin that when fitted, is not loose as such, due to the outward tension, though when the split is closed up it will wiggle side to side a bit (I'm guessing about 15 thou. Does it need to be a better fit than this? (going by, quite a bit of oil dribbles out of rocker holes normally, would this drop oil pressure much). Also, wear on shaft, on all rocker areas, the most is 9 thou. Would this affect efficient valve operation much?. The engine is quiet when running. Also, eleven of the push rods have a slight flat on the top ball, except one?. Any help great please. Cheers, Dave Ps. On further examination of of shaft/rockers (not cleaned yet), all oil holes appear clear. Could the wear on shaft, also possible wear on the rocker bores cause a loss off oil pressure, causing less oil passage further up the shaft?. Edited July 10, 2018 by daverclasper Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 10, 2018 Report Share Posted July 10, 2018 with more ways for the limited supply to escape then yes oil supply to the front end is going to deteriorate theres not a lot of pressure as the supply up the rear pedestal is not full flow but limited by a flat on the cam bearing to give a squirt once every cam revolution if you have 0.009" shaft wear thats nearly as much as the desired clarance so a new shaft is needed here. the rockers are probably not worn as much in the bore as the shaft is harder and that takes the wear . you can stone or emery the pads to remove the ridge which affects the feeler entry , leave the valve contact zone as is. the flat on the base of the push rod spherical is normal for oil retention do keep push rods with their matched follower and tappet screw as theyb are all bedded in to each other Pete Pete Link to comment Share on other sites More sharing options...
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