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#1 |
Join Date: Apr 2021
Posts: 15
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Hawk DLX oil leak, 800 miles
Hey everyone, got a DLX with around 850 miles on it. Left it sitting in a garage for around a year while I was overseas and when I get back have noticed it has a small oil leak (maybe a few drips a day). However when the bike is warm and running the leak does increase. Upon inspection, I originally thought the leak was coming from the seal around the gear shifter, but after cleaning it and sticking paper towels in certain places it appears the leak is higher up. Any ideas on some other common spots for a newish hawk to leak?
Thanks. |
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#2 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,685
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Might just be from the chain. Also check for cracks in the rubber on the crank case vent tube.
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#3 |
Join Date: Jun 2021
Posts: 80
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The plug on the back of the valve cover had threads that were stripped out on my regular Hawk. I installed a helicoil to repair.
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#4 |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,601
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It seems unlikely that much oil could come from the chain unless you oiled it, and then it would be a spray, not a leak. And oil shouldn't leak at all when parked if it was a threaded port on the valve cover since there is not oil getting pumped up there (when parked). And it would show up much higher on the cylinder.
The driveshaft seal is right above the gear shift lever. It is inside the front sprocket cover. Pull the cover and clean any residual oil up. Then, leave it off for a brief spin and see is it is dripping down from between the front sprocket and engine case. If this is the leaking seal, you can replace the seal without cracking the engine apart. There are oil seal puller tools to get that bad seal out. Drain the oil, remove the sprocket, extract the seal, and push in the replacement. The front sprocket is boxed in and there are no other possible leak sources in there. Wiring goin into the stator is out of there, and forward, and oil would probably end up farther forward of there. Last edited by Thumper; 10-04-2022 at 01:56 PM. |
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#5 |
Join Date: Mar 2021
Location: Ohio
Posts: 43
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Mine leaked from the drain plug. Tightened it and, BOOM...fixed.
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#6 |
Join Date: Apr 2021
Posts: 15
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I believe I may have had too much oil in it. Drained and replaced with a lot less and I'm not noticing it leaking now. Before my circle was completely full when the bike was upright. Now it is about half.
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#7 | |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
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Quote:
Oil does actually get pumped up into the valve cover on the cg engines. That is the main oil passages for the valves.
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Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 |
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#8 | |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,601
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Quote:
I know there is active oil pumping up to lubricate the valve rockers. But not when it isn't running. And I don't know how that oil would appear under the front sprocket cover (was my point). OP has not diagnosed or gotten back to us yet. If he used motor oil to lube his chain, your theory makes the most sense I suppose the drive shaft seal under the front sprocket could have been faulty or installed wrong. That's my back up theory. I suppose it could also come out through the seal around the stator wiring where it goes in just on front side of the sprocket cover. But that seems unlikely. |
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#9 | |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
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Quote:
A bad countershaft seal (sprocket side) will leak while at rest with the motor too full when it's on the side stand and also fling seeping oil while running. The latter being harder to detect.
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Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 |
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#10 |
Join Date: Feb 2021
Location: Kansas City
Posts: 2,601
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Excessive oil pressure could easily push out through any of the shaft end seals. It could go out the crankshaft ventilation tube as well. I wonder where it was coming out?
The output shaft seal behind the front sprocket seems like a good candidate. But glad you fixed it! |
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