Scooter9495 Posted May 2, 2006 Share Posted May 2, 2006 Hello i am new here and wanted to say hello,i also have a question-is it normal when you remove the oil fill plug while the bike is running to have a flow of air blowing out? i was pretty sure while running there should be vacuum in the crankcase.the bike is a 2002 with 5400 miles. Quote Link to comment Share on other sites More sharing options...
The Krypt Keeper Posted May 2, 2006 Share Posted May 2, 2006 The oil should blow out like its ass is on fire. The crank sloshing around the oil should also make air blow out as well. Now answer me a question.. What does oil do in an engine? What does an engine do when there is no more oil in running engine? Please don't do that anymore.. Quote Link to comment Share on other sites More sharing options...
02BIRD Posted May 2, 2006 Share Posted May 2, 2006 so i should shut off the motor to check the oil who would have known Quote Link to comment Share on other sites More sharing options...
Scooter9495 Posted May 2, 2006 Author Share Posted May 2, 2006 Ummmmm this wasnt a question of "if i had oil" the question is should these cases be pressurized or under vacuum? does this bike have a PCV style evacuation setup. Quote Link to comment Share on other sites More sharing options...
beondwacko Posted May 2, 2006 Share Posted May 2, 2006 There should be a crankcase vent tied into the airbox. Quote Link to comment Share on other sites More sharing options...
Scooter9495 Posted May 2, 2006 Author Share Posted May 2, 2006 There should be a crankcase vent tied into the airbox. Thanks for responding,i understand the vent tube to air cleaner box but im worried i am getting "blow by" by the amount of air being put out from the filler plug. Quote Link to comment Share on other sites More sharing options...
RXX Posted May 2, 2006 Share Posted May 2, 2006 There is a wizard in there....leave him alone when he is working.... Quote Link to comment Share on other sites More sharing options...
porterb123 Posted May 2, 2006 Share Posted May 2, 2006 There should be a crankcase vent tied into the airbox. Thanks for responding,i understand the vent tube to air cleaner box but im worried i am getting "blow by" by the amount of air being put out from the filler plug. If you want to keep your engine alive, never pull the oil plug while the bike is running. If you are concerned about blowby ( you should not be ) do a leakdown test and then you'll know without destroying your engine. Quote Link to comment Share on other sites More sharing options...
Redbird Posted May 2, 2006 Share Posted May 2, 2006 He said oil fill plug, guys, not oil drain plug. Quote Link to comment Share on other sites More sharing options...
Scooter9495 Posted May 2, 2006 Author Share Posted May 2, 2006 He said oil fill plug, guys, not oil drain plug. Thank you REDBIRD Quote Link to comment Share on other sites More sharing options...
airborneXX Posted May 2, 2006 Share Posted May 2, 2006 You're fine just enjoy the ride. If you had blow-by your airbox would be full of oil. These motors are good for well over 100,000 miles, so unless someone did something dreadfully stupid you are good to go. Quote Link to comment Share on other sites More sharing options...
The Krypt Keeper Posted May 2, 2006 Share Posted May 2, 2006 He said oil fill plug, guys, not oil drain plug. :icon_doh: You don't fill your engine up with oil from the drain plug? :icon_think: I figure that since its already off I might as well fill it back up that way also But you gotta be quick, I watched Karate Kid 6 dozen times before I mastered it.. Sorry I misread your question.. Yes it should be blowing air out... Quote Link to comment Share on other sites More sharing options...
Scooter9495 Posted May 2, 2006 Author Share Posted May 2, 2006 He said oil fill plug, guys, not oil drain plug. :icon_doh: You don't fill your engine up with oil from the drain plug? :icon_think: I figure that since its already off I might as well fill it back up that way also But you gotta be quick, I watched Karate Kid 6 dozen times before I mastered it.. Sorry I misread your question.. Yes it should be blowing air out... Ok, thanks alot everyone i just wanted to make sure. Quote Link to comment Share on other sites More sharing options...
bhanxx Posted May 2, 2006 Share Posted May 2, 2006 He said oil fill plug, guys, not oil drain plug. Or is it the oil check plug? Where is that one again? :icon_think: Quote Link to comment Share on other sites More sharing options...
Red J Posted May 3, 2006 Share Posted May 3, 2006 If you drain out the oil, just put the sukka back on the 12 bar and fill 'er up again. How do youse guys put oil back in? Quote Link to comment Share on other sites More sharing options...
gharknes Posted May 4, 2006 Share Posted May 4, 2006 the bike is different from car, fill car from rocker there should be no puffing from filler, if there is you have possible ring damage allowing compression to leak down to sump, bike is different, the air you see coming out is a product of the movement of oil round the engine under great pressure from the oil pump, you will alway get this, you also have the pistons on their way down stroke this will also cause pressure so don't worry Quote Link to comment Share on other sites More sharing options...
shovelstrokeed Posted May 4, 2006 Share Posted May 4, 2006 Has nothing to do with the pressurized oil running around inside the engine. That is all contained within oil passages until it bleeds out the sides of the bearing surfaces and returns to the sump, at which time it is free oil. It has everything to do with the fact that pistons pump air and from both sides! (who would have thought). In theory, since two pistons are going up and two are moving down almost all the time within the engine crankcase volume should remain the same and crankcase pressure should remain neutral. In practice, the air communication between the cylinders is not that good and the crankcase can become pressurized at even fairly low RPM. For quite some time now, drag racers have been fitting vacuum pumps to the crankcases of their engines as these pumping losses are significant. There is about 10 net HP to be gained at the expense of a little weight and complexity. The NASCAR boys do it too, just in a different way, with their dry sump systems. They run as many as 3 or 4 stages of scavenge pump on their dry sump systems. Quote Link to comment Share on other sites More sharing options...
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