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RE: Re: Re: [Enfield] RE: Crankcase Pressure

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  • david_boyt
    Thanks Tom for all the advice. I ve been thinking. Would it be a good idea to use Autosol to lap in the plungers to the pump disc? Or just to use a very fine
    Message 1 of 18 , Sep 21, 2013

      Thanks Tom for all the advice. I've been thinking. Would it be a good idea to use Autosol to lap in the plungers to the pump disc? Or just to use a very fine emery cloth? 

      --- In royalenfield@yahoogroups.com, <royalenfield@yahoogroups.com> wrote:

      I have the black rubber timing cover gasket, so I use no sealant.
      If I were to use the paper gasket, I would be inclined to use a non-hardening sealant like hylomar which will not ever get hard, but seals the gasket. If any did get into the oil hole, it would just wash thru. That's the strong point of using hylomar in these applications. It's safer for not getting a clog.

      If you had two gaskets on there, and you now only have one, you should definitely check that cam end-play situation, and use the shims accordingly so that you have enough shims, but you don't get binding. If you put enough shims on to get it to bind up when you tighten the timing cover, remove one shim from each cam spindle, and see if it turns free after you tighten-up the timing cover. If it does, then you have enough shims for setting end-play close enough.


      From: "david_boyt@..." <david_boyt@...>
      To: royalenfield@yahoogroups.com
      Sent: Saturday, September 21, 2013 3:46 PM
      Subject: RE: Re: [Enfield] RE: Crankcase Pressure

      Hi thanks for the quick reply Tom. I will check the plungers tomorrow. One thing I forgot to mention is. My bike has the Hitchcocks High capacity oil pumps.
      Unfortunately I have now binned the old timing cover gaskets. But there was two. I am/was replacing with just the one normal paper style gasket. So will check all your previous advice.
      In your opinion Tom do I need to use sealant on the timing cover gasket? Do you use sealant? 
      Regards Dave

      --- In royalenfield@yahoogroups.com, <royalenfield@yahoogroups.com> wrote:

      That was good work finding those issues, and correcting them. The gasket partially occluding the oil passages is a pretty big deal, so that could account for some oiling issues.
      It sounds as if the oil pump drive and pumps are now pretty much freed-up, but if they are sticking when the plungers are all the way in, the cause is usually that there  is a burr on the drillings of the pump disc, and it is hanging up the plunger on the little groove on the plunger. Check that, and carefully de-burr as needed.

      If you are going to use a sealant on the timing cover gasket, blue hylomar is a good choice. It won't cause clogging like RTV sealant can. If you are using the black rubber timing cover gasket, it can be re-used.

      If you have the original timing cover gasket that you took off, and now are using a different one, please check the thicknesses to be sure that the new is the same as the old. The thickness of the timing cover gasket sets the end play of the cams, and you may need more shims on the cam spindles if the gasket is too thick, or fewer if the gasket is thinner. If the end play is wrong, the cams can get bound up tight when you tighten up the timing cover on the engine. You can feel this by rotating the engine, and if the engine gets hard to turn after you tighten the timing cover, then you have the wrong end play on the cams, and need to adjust that.


      From: "david_boyt@..." <david_boyt@...>
      To: royalenfield@yahoogroups.com
      Sent: Saturday, September 21, 2013 2:36 PM
      Subject: [Enfield] RE: Crankcase Pressure

      Hi Bill thanks for your reply. Can I ask Tom and Bill and anyone else with relevant information to please comment on this. Today I pulled the timing chest cover off. I have now blown out all the oil passage ways. The air flows down all of them fine with no back pressure. The gaskets that were fitted to the timing chest did partially block all the three oil ways in the timing cover. I have started the procedure to fit the new gasket. I am blue printing the new gasket making sure it does not block any of the passage ways. I take it this is all ok?
      Whilst I had the cover off. I thought to do all the checks mentioned on Hitchcocks site here http://www.hitchcocksmotorcycles.com/pictures/content10/oil_pump_spindle.pdf I haven't checked the rockers yet(Samrat rockers). Or the return pump oil filter sump plug clearance yet(just going to put two washers there anyway). I did go ahead and check the oil pump spindle as instructed. It did not rotate the full 360 degree freely. So on the feed side. The plunger has had in the past fouled the housing, as one of the previous owners has already dremeled the housing so that the plunger does not contact. On the return side it looked very close. I pulled the plunger and there was what appeared to be a polished area where it would of contacted the housing. So I filed the housing so I could see a definite gap through its full rotation.  With the return pump fitted without the spring, gasket, and cover in place. It rotated the full 360 degree with light thumb pressure. With the gasket, cover, and spring. It gets hard in a couple of places and is hard to rotate. Can barely rotate it with my thumb. From using my head(rare) I checked to see at which points it was sticking. Its sticking when the plunger in the return pump is fully in. Sometime fully out( nowhere near the wall housing, so plunger is not fouling) It more or less stays the same difficulty with the feed pump fitted, tiny bit harder maybe. All parts were coated in a good amount of oil.
      Am I missing something? Have I done something wrong? Are my oil pump spindle and pumps ok? Because according to Hitchcocks page there is something not right. Should rotate with light thumb pressure fully assembled.
      Last question. Do you guys use sealant on the timing cover gasket? I was thinking of trying without. I have read I should apply it the engine side of the gasket and leave it at that. But would prefer to use none as cleaning gaskets and sealant off add quite a bit of time to jobs. But I don't want to loose oil tightness.  
      Regards Dave

      --- In royalenfield@yahoogroups.com, <fiferwd@...> wrote:

      Early on I had a similar problem and achieved nirvana when I sealed off the return spigot in thetiming chest and eggs out one of the oil passage holes in the timing chest cover that did not line up with the oil pump properly. Thus was a manufacturing defect that needed correcting and mine could have been a one time thing.

      On the Enfield Forum, some time back, another sufferer mentioned putting some sort of power brake valve in the breather hose to close it off when there was positive crank case pressure. Sorry to be so vague but it was probably four years ago. Check out the Forum. 
      Bill Deutermann
      2005 Bullet ES 535cc
      c'', }

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