Guppy916 Posted June 27, 2018 Report Share Posted June 27, 2018 Could this be the cause of my lack of oil to the cam, these seals were new less than a year ago, from one of our favourite suppliers please note there are not 12 of them only three were not split. I haven't found the others there not in the sump so i cut the filter in open and they are not there either Link to comment Share on other sites More sharing options...
Anglefire Posted June 27, 2018 Report Share Posted June 27, 2018 Stupid question time What are they? Don't just say seals ? Link to comment Share on other sites More sharing options...
rogerguzzi Posted June 27, 2018 Report Share Posted June 27, 2018 12 minutes ago, Guppy916 said: Could this be the cause of my lack of oil to the cam, these seals were new less than a year ago, from one of our favourite suppliers please note there are not 12 of them only three were not split. I haven't found the others there not in the sump so i cut the filter in open and they are not there either Hello Are these valve stem seals? I never see how this type could work as they are going to just bob up and down with the valve not wipe the stem and only needed on inlet as exhaust has gas trying to come up but I suppose that may stop pressure but they need oil Roger Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 28, 2018 Report Share Posted June 28, 2018 Never used them but this type of seal O ring is supposed to fit under the collets to reduce oil puddled on the spring cap from Running down the stem ???? Not just fit on the stem and Bob up and down Pete Link to comment Share on other sites More sharing options...
Guppy916 Posted June 29, 2018 Author Report Share Posted June 29, 2018 Yes sorry guys valve stem seals, there isn't enough room to fit them under the collar, on this rebuild I haven't used them Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 29, 2018 Report Share Posted June 29, 2018 ive never used them either , theres's no real clues about these ,, on some designs they fit in a groove inside the valve guide stem bore but we dont have them either , well ive never found any Pete Link to comment Share on other sites More sharing options...
dave.vitesse Posted June 29, 2018 Report Share Posted June 29, 2018 The Standard Triumph never used them. Hence, there is no correct place for them to fit. As a result they normally get pounded by the valve gear and split. Dave 1 Link to comment Share on other sites More sharing options...
JohnD Posted June 29, 2018 Report Share Posted June 29, 2018 On 6/27/2018 at 10:00 PM, Guppy916 said: Could this be the cause of my lack of oil to the cam, these seals were new less than a year ago, from one of our favourite suppliers please note there are not 12 of them only three were not split. I haven't found the others there not in the sump so i cut the filter in open and they are not there either You explained these are valve stem seals. How can they influence cam (shaft?) oil supply? JOhn Link to comment Share on other sites More sharing options...
Guppy916 Posted June 29, 2018 Author Report Share Posted June 29, 2018 I have lost three of them some where in the engine (when in use) so i thought they might have blocked an oil way , as my cam shaft and cam journals are completely knackered in only 80 miles of use, the oil pump filter was completely clean when i striped the engine Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 29, 2018 Report Share Posted June 29, 2018 being bold ...were the journals maybe already on the way out before the rebuild ??? hiding bits of o ring are probably consumed and long gone Pete Link to comment Share on other sites More sharing options...
Guppy916 Posted June 29, 2018 Author Report Share Posted June 29, 2018 Hi Pete, no the journals were in good shape, could it be because I got the shims wrong under the dizzy pedestal, and iv'e no grove in the valve guides for them to fit in, Also looking at the bottom of the pedestal there is no obvious signs of heat or wear, now i'm paranoid it's going to happen again, all the oil ways were cleaned & flushed through, all the oil galley plugs have been removed for cleaning, and were possible poked through with a nylon rod Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 30, 2018 Report Share Posted June 30, 2018 I dont think the pedestal would cause that much heat , its almost like there was No oil at the cam journal bores But why ?? nothing you found other than excess wear and with so much splash or the crank you would not expect a low lube failure We know the wear happens but youres had a lot of heat generated Pete Link to comment Share on other sites More sharing options...
Guppy916 Posted July 1, 2018 Author Report Share Posted July 1, 2018 On 6/30/2018 at 7:26 AM, Pete Lewis said: But why ?? is the question Pete, the ends & mains were in perfect condition, Number 10 rocker the shaft was badly worn, I was also running a separate oil pipe to the head with NO restrictor in, and because the engine was new I used running In Oil, Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 1, 2018 Report Share Posted July 1, 2018 i can only guess it didnt help, and or coupled with a journal bore was so worn the gallery lost any supply of meaninfull pressure but with all the splash you would think the cam was well pretty well oiled , to generate that level of local heat does seem out the box hugh and others have said about oil loss from worn cam bearing bores ,but ive not been there myself Pete Link to comment Share on other sites More sharing options...
Guppy916 Posted July 1, 2018 Author Report Share Posted July 1, 2018 The front & rear cam journals were fine it was only the middle journals that suffered Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 1, 2018 Report Share Posted July 1, 2018 the whole senario makes no sense , even dizzy drive preload wont wreck that much of the centre ones i see this as all a bit OOOh ARGH ! what the ????? its out of my zone pete Link to comment Share on other sites More sharing options...
Guppy916 Posted July 1, 2018 Author Report Share Posted July 1, 2018 Just done a 5 mile round the village trip, cold oil pressure 80 psi with 65 psi hot at about 2000 rpm & 50 psi on tick over, no horrible noise's, oil pressure goes up with the revs, and regarding dizzy pre load there were no signs of heat or wear, on either the drive wheel from the cam to oil pump drive, or on the bottom of the dizzy pedestal Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 1, 2018 Report Share Posted July 1, 2018 fingers crossed then Pete Link to comment Share on other sites More sharing options...
dave.vitesse Posted July 1, 2018 Report Share Posted July 1, 2018 That sound OK to me. Get it along to Triumfest. Well done. Dave Link to comment Share on other sites More sharing options...
Guppy916 Posted July 1, 2018 Author Report Share Posted July 1, 2018 the 'triumfest' Grump's is not that confident in the engine yet, not after the last cam failure Link to comment Share on other sites More sharing options...
Guppy916 Posted July 1, 2018 Author Report Share Posted July 1, 2018 Right guy's I have just done another trip round the village aprox 5 miles oil pressure still 55/60 at 2000 rpm , temp at normal cooling fan on, oil down to 40 psi on tick over, but the dizzy body is too hot to touch 75c ?, aim the the laser at the oil gallery plugs (middle one's) high 80's to 93c the ends are about 10c cooler, could the stat be stuck shut ? drain down time and check stat when it's cooled down Link to comment Share on other sites More sharing options...
NonMember Posted July 1, 2018 Report Share Posted July 1, 2018 The oil does get hot - hotter than the coolant - in normal use. It shouldn't cause a problem until well over 100C Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 1, 2018 Report Share Posted July 1, 2018 There is no water cooling anywhere around the dizzy and its drive, likewise non around the cam or oil gallery Heat soak means they all take on any amblent block temperature By all means check you have a 82c stat witha jiggle pin in the rim And dont get paranoid about temp varaiations around the engine Pete Link to comment Share on other sites More sharing options...
Guppy916 Posted July 1, 2018 Author Report Share Posted July 1, 2018 thanks guy's just going to drain it and check stat stat was a 74c and working, Pete should I be worried about the dizzy being to hot too touch, When I filled the rad I had the engine running, heater on hot, I half filled the overflow bottle, do I need to think about air locks ? Pete whats this jiggle pin ? Link to comment Share on other sites More sharing options...
thescrapman Posted July 2, 2018 Report Share Posted July 2, 2018 Suzy too hot after 5 miles? Seems odd to me that was where the overheats happened? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now