So, I have a 2005 gs500f that is leaking oil like crazy. The leak apears to be coming from the top of the engine since the carbs are soaked from the top and the top as well as the front of the airbox have an oil splatter pattern on it. I just replaced the breather gasket as well as the cylinder head cover gasket, started the bike up, let it idle for about 5 minutes, the gave her some gas up to about 6 grand the same oil leak started again. I say again, because it did this on my way home from work one night hince all of the gasket replacing. I can't see where it is coming from nor do I have any idea what else it could be. Can anyone please help? I don't know what else on the top half of the engine could leak oil besides those two gaskets....Please help!
Maybe this is a dumb question, but do you have the metal oil screen (looks like a mini steel wool pad) and the breather hose in place?
Also
Are the O-rings under the cover bolts in place? There should be a total of four of those.
Edit: part numbers 5 & 8 in the diagram at the link
http://cdn.partzilla.com/diagram/suzuki/02/61/0001.png
Yes, to all questions. The leak started before I touched anything. And since I couldn't tell where it was coming from, I decided to change the gaskets thinking those would be the only places an oil leak could come from on the top of the engine. I'm obviously wrong, what else could it be?
Does your bike have an oil cooler? Where do those lines go?
The oil passages run up through the cylinders into the head. Maybe there is a small gap between the cylinders and the head, the oil pressure builds as the revs go up, maybe the oil is getting forced out between.
I think you should get down with a flashlight and mirror and rev the engine up. Wear eye protection
Just to clarify, I don't remember ever having hose attached to the breather. It just has a nozzle that faces the rear of the bike. I have been driving the bike daily for a year now and I know there hasn't been a hose attached there in that time.
Yes, its oil cooler is front mounted on the frame. Lines run under the bike below the oil filter housing.
The 3 holes in the breather cover gasket go forward as shown in link above but doesn't the filter screen go towards the front too over the holes? And put the hose back on to the airbox and then if oil is vented there it will come out the airbox drain hose down near your right foot but I've never seen anything but a little oily water come out of the drain in 180k GS miles.
http://www.shspowersports.com/fiche_image_popup.asp?fveh=7247§ion=300551&year=2004&make=SUZUKI&category=Motorcycles&dc=3378&name=AIR+CLEANER
Part 6
chain tensioner gasket? or is it not that far down?
On my bike the filter only fit on one side, there was a little tab sticking down on the other side so I think that's kind of a mistake-proof thing.
The holes should be forward.
I hope your air box does not get full of oil
What seems like a lot of oil to some might not seem like so much to others and vice versa, but there should be very little oil coming out of the crankcase breather. It's mostly oily water vapor. The water evaporates but the oil does little if any.
I'd clean up the top of the engine as well as possible and check where it's leaking. You can put bike on center stand, take 2 bolts loose at back of tank that mount into bike frame and lift it and put a piece of 2x4 or something in there and run it and watch peeking in from the side with light before putting the hose on. Be careful you don't drop the tank.
If you see oil coming out do a compression check and see if there might be a lot of blow by indicating a badly worn or damaged engine, there shouldn't be much. I put a lot of miles on 2 GSs and never noticed anything coming out except oily water vapor. Back decades ago when crankcases were vented to the atmosphere you could see clouds of oily smoke coming out of a worn out engine, burned in the combustion chamber and blown back out past worn rings/pistons. Can get high crankcase pressures that way.
Hopefully you'll find the leak elsewhere if it's a bad one.
I do do as gsjack suggests. May i ask how many miles are on the thing? Another dumb question, i know oil cap is at bottom but could it have loosened
Jonin bought it about a year ago with 9k on the clock but we're never sure on used vehicles are we. He uses it as a commuter.
From what was said it doesnt sound like it was abused on his end. Got a feeling its something simplel
OK guys, I did what you said and slid the gas tank over, cranked the bike to see where the leak was coming from. No leaks from anything until the revs get above 6...Then oil starts shooting out of the breather hole, like, a lot...Any idea what could be causing that? I wouldn't think that much oil should even be getting to the breather.
Also, before I gave it the revs I put my finger over the breather hole at idle and there was quite a bit of air coming out. Then when I gave it some revs the air magically changed to oil,lol
(http://static.comicvine.com/uploads/original/12/123441/3590694-gr+hell+fire+transforms+bike.gif) :thumb:
Exactly.
"If you see oil coming out do a compression check and see if there might be a lot of blow by indicating a badly worn or damaged engine, there shouldn't be much. I put a lot of miles on 2 GSs and never noticed anything coming out except oily water vapor. Back decades ago when crankcases were vented to the atmosphere you could see clouds of oily smoke coming out of a worn out engine, burned in the combustion chamber and blown back out past worn rings/pistons. Can get high crankcase pressures that way." ~GSjack
(http://www.html.am/images/html-codes/marquees/arrow-up.gif)
I wonder since bike was bought used, i wonder if there was a mileage discrepancy?
So what you are saying is that it's probably a bad engine?
Quote from: Jonin on November 07, 2014, 01:20:45 PM
So what you are saying is that it's probably a bad engine?
Not necessarily, check compression hot and cold for some indication of ring/piston/valve condition first. Another possibility is a restricted return of the oil. When you changed the gaskets did you notice if there might be something like a rag or whatever blocking the large center slot between the cylinders where the oil returns. Just takes a few minutes to lift the cover and check it.
Those engines have a lot of oil flowing to the top to cool the combustion chambers and it needs a good return too. If you crank the engine over without starting with the valve cover off the oil will overflow the front of the engine in less than 30 seconds and there is many many times more flow to the top at your 6k rpm point that must return to sump.
Right gsJack, but if the rings were getting blow-by, wouldn't there be a considerable amount of smoke exiting the exhaust? And I took the cylinder cover back off and I didn't see anything that looks like a rag inside the case. Also I have another question: Does this bike have an oil wiper that is supposed to wipe excess oil coming off of the timing chain? All I see are chain guides.
Any chance the top chain guide inside the valve cover is missing? The holes for the screws that hold it go up thru to the area under the breather cover and that might put a lot of extra oil in there if they were missing.
Yes one would expect a lot more smoke from the exhaust if ring wear was bad. It's customary to block that center slot in the head with a rag when changing shims so they aren't dropped into the sump. That's why I asked about a rag. Don't think there is any cam chain wiper as such. Just front, top, and tensioner rear guides.
http://www.shspowersports.com/fiche_image_popup.asp?fveh=2102§ion=92666&year=2001&make=SUZUKI&category=Motorcycles&dc=3378&name=CAM+CHAIN
Roger that, the top guide is there in place and I'm not getting any smoke. I can't figure this out. What else could cause the pressure to get up that high? I appreciate everyone's help by the way
Quote from: Jonin on November 07, 2014, 10:18:06 AM.....................No leaks from anything until the revs get above 6...Then oil starts shooting out of the breather hole, like, a lot............................Also, before I gave it the revs I put my finger over the breather hole at idle and there was quite a bit of air coming out. Then when I gave it some revs the air magically changed to oil,lol
So where is the pressure coming from? Blown head gasket, hole in a piston? :dunno_black: Time for the compression test I think.
Agree with getting a compression check but would be interesting to know a couple of more things about the problem.
You say it starts leaking at 6000 rpm: Is it because of the rpm or is it possible the it starts leaking when the engine warms up to a specific temp? I'm wondering if there might be a crack in the head that expands once it heats up or when the pressure builds up. It would be fairly easy for the head to crack around one of the bolt holes or at the point where a hose connects.
If for some reason the bike was overheated in it's past life that may have cracked it. Do you remember what the oil looked like or smelled like when you first changed it? Burned oil has a smell that you never will forget.
Good luck with the problem....and do let us know what you find.
Well, if the head was cracked where a hose is connected or where it is bolted on, wouldn't it leak there instead of coming out of the breather? I just changed the oil at the scheduled time and it looked/smelled normal. As far as it leaking at higher temperatures, I don't think that's it because once I back the throttle off it stops shooting out of the breather. I will get a compression test as soon as I can take it to someone since I have no way of doing it myself and don't have much money.
ill send you a tester if you want :dunno_black:
That would be the most amazing thing ever,lol.
address?
Sent ya an email with the address.
Buy a can of Brake Parts Cleaner, and douse the motor in it. It eats up oil and crap in no time. And it's very quick to evaporate. After you've got the oil off it, you should be able to trace where it's coming from better
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