rider Posted September 24, 2009 Report Share Posted September 24, 2009 anyone remove timed breather and install pcv valve instead. seen this recommendation on another website Quote Link to comment Share on other sites More sharing options...
RDN Posted September 24, 2009 Report Share Posted September 24, 2009 My '94 came with (still has) both. I did upgrade the PCV with one that works though. Quote Link to comment Share on other sites More sharing options...
Serious Black Posted September 24, 2009 Report Share Posted September 24, 2009 For what gain? I would try it if it reduces pumping losses and can get me a horse or two extra. Quote Link to comment Share on other sites More sharing options...
rider Posted September 24, 2009 Author Report Share Posted September 24, 2009 For what gain? I would try it if it reduces pumping losses and can get me a horse or two extra.these guys said that the bolt or pin or whatever that holds the timed breather is a weak link and ends up as shrapnel...ever heard this? Quote Link to comment Share on other sites More sharing options...
Bilge Keel Dave Posted September 24, 2009 Report Share Posted September 24, 2009 I've heard that the pin can break, but all that happens is that the engine case can pressurize and leak oil. It is a rare occurance. Dave Quote Link to comment Share on other sites More sharing options...
willdedrick Posted September 29, 2009 Report Share Posted September 29, 2009 I've heard that the pin can break, but all that happens is that the engine case can pressurize and leak oil. It is a rare occurance. Dave I'm going through this now on my 2002 with 2000 miles. Its a oily mess. Anyone repair the breather before? Quote Link to comment Share on other sites More sharing options...
willdedrick Posted September 29, 2009 Report Share Posted September 29, 2009 I'm adding a PVC valve and a catch can to see if it helps. I'll upload some pics in a bit. Quote Link to comment Share on other sites More sharing options...
Ken Ulrich Posted September 30, 2009 Report Share Posted September 30, 2009 The idea of replacing the timed breather with a pc valve is the most stupid upgrade I have ever seen, to start with the pc valve will never allow enough air to be expelled to properly vent the crankcase to the level that the original timed vent did. Those who promote this deal as smokin somthin weird. I and Lorne have never seen a broken or defective timed vent with one exception, and that was where the roter was installed not indexed to the pin, as usual, sloppy work will get you nothing in return. Further, a pc valve of the wrong type/size can start to flutter at high speeds, and then friend, you can watch the oil flow. SB says it right, what is to be gained, anyone with any real knowledge of boxer type engines will poo-poo the hairbrained mod. It is so ill advised, but like many things out there in Dnepr world and elsewhere (Ural) It is started, and then takes on a life of its own, I believe this one started in merry ol England about 20 years ago, If not my apologies to the throne......Ken :unsure2: Quote Link to comment Share on other sites More sharing options...
Serious Black Posted September 30, 2009 Report Share Posted September 30, 2009 Actually I think the English just removed the breather, we don't have PCVs this side of the pond, at least not 20 years ago. Removing the breather valve rotor has it's merits if the pipe diameter is to small but I did an experiment (my first post infact!) where I connected a pressure gauge up to the dipstick hole. At anything over idle there was a vacuum. Quote Link to comment Share on other sites More sharing options...
willdedrick Posted September 30, 2009 Report Share Posted September 30, 2009 So the PCV will not cure the broken pin in the timed breather. Has anyone removed the timed breather? That big of a deal? I still need to repair mine. Quote Link to comment Share on other sites More sharing options...
peacons Posted September 30, 2009 Report Share Posted September 30, 2009 The idea of replacing the timed breather with a pc valve is the most stupid upgrade I have ever seen, to start with the pc valve will never allow enough air to be expelled to properly vent the crankcase to the level that the original timed vent did. Those who promote this deal as smokin somthin weird. I and Lorne have never seen a broken or defective timed vent with one exception, and that was where the roter was installed not indexed to the pin, as usual, sloppy work will get you nothing in return. Further, a pc valve of the wrong type/size can start to flutter at high speeds, and then friend, you can watch the oil flow. SB says it right, what is to be gained, anyone with any real knowledge of boxer type engines will poo-poo the hairbrained mod. It is so ill advised, but like many things out there in Dnepr world and elsewhere (Ural) It is started, and then takes on a life of its own, I believe this one started in merry ol England about 20 years ago, If not my apologies to the throne......Ken :unsure2: Is it normal to have air pulses out the crankcase filler hole when the dipstick is removed and the engine is running? Or does this indicate a problem with the breather? Quote Link to comment Share on other sites More sharing options...
IMZman Posted September 30, 2009 Report Share Posted September 30, 2009 Yes it is normal...it is called the "path of least resistance" :unsure2: See here for opening the distributor cover and getting the breather and pin. Easy. Much easier with the engine out of the frame but not necessary. If you find the pin on the cam gear is broken (it is just a press fit into a hole on the gear) you can pull one of the alignment pins for the valve cover gasket and use it. May need to be ground/filed a bit to fit. http://myural.com/removing_and_reinstalling_the_di.htm Quote Link to comment Share on other sites More sharing options...
willdedrick Posted September 30, 2009 Report Share Posted September 30, 2009 Yes it is normal...it is called the "path of least resistance" :unsure2: See here for opening the distributor cover and getting the breather and pin. Easy. Much easier with the engine out of the frame but not necessary. If you find the pin on the cam gear is broken (it is just a press fit into a hole on the gear) you can pull one of the alignment pins for the valve cover gasket and use it. May need to be ground/filed a bit to fit. http://myural.com/removing_and_reinstalling_the_di.htm Super!! Thanks a lot. This will help soooooo much!!! It just put 1/2 cup of oil into the catch can on a 12 mile ride.. Quote Link to comment Share on other sites More sharing options...
IMZman Posted September 30, 2009 Report Share Posted September 30, 2009 And before you go to all the trouble...do you know for sure the breather is not working? It is pretty fool-proof, breather just rides on the cam and is timed by the slot in it that mates to the pin in the cam gear. Only problem it can have is pin falls out or breaks...very rare. Unscrew the 90 degree elbow for the tubing to the air filter, shine a light down the hole, use the kick starter to turn the engine over and watch to see if the breather turns. You'll see 2 opposed holes whiz rhythmically if all is well. There are other things that can cause you to peez oil out the breather. Oh yeah, forgot to mention that I agree with Ken...replacing it with an external PCV is silly. Quote Link to comment Share on other sites More sharing options...
willdedrick Posted September 30, 2009 Report Share Posted September 30, 2009 And before you go to all the trouble...do you know for sure the breather is not working? It is pretty fool-proof, breather just rides on the cam and is timed by the slot in it that mates to the pin in the cam gear. Only problem it can have is pin falls out or breaks...very rare. Unscrew the 90 degree elbow for the tubing to the air filter, shine a light down the hole, use the kick starter to turn the engine over and watch to see if the breather turns. You'll see 2 opposed holes whiz rhythmically if all is well. There are other things that can cause you to peez oil out the breather. Oh yeah, forgot to mention that I agree with Ken...replacing it with an external PCV is silly. You are correct, we looked in the hole and unfortunately saw no rotation. I followed the instructions and removed the cover. The pin was broke off but that's not the worst part. The breather was stuck in its "race" the area around it blackened from heat and cracked. As if somehow the breather did not mate up well and slowly wore into the timing cover before coming to a dead stop breaking the pin. We had to use a large socket and hammer to get it out. Ill upload some pics if you guys are interested. So as of now i need to replace the timing cover and breather. But at least i feel better knowing whats going on.I just need to order a cover, breather and gasket. Any thing you fellas can think of?Again, thanks for all the help!!!Will Quote Link to comment Share on other sites More sharing options...
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