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techtalk:evo:oil06 [2019/10/13 23:07] hippysmack [Leaking out the breather vent line(s)] |
techtalk:evo:oil06 [2019/10/13 23:22] hippysmack [Leaking with engine running riding] |
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| ===== Visual Inspection ===== | ===== Visual Inspection ===== | ||
| - | ==== Leaking with engine running riding ==== | + | ==== Leaking with engine running ==== |
| * Degrease the bike until there's no oil remaining. \\ Then take some Soft n Dri (women's antiperspirant spray), talcum powder etc. and spray it around the rocker gaskets (or other suspected leaking area). ((ReddTigger of the XLFORUM http://xlforum.net/forums/showthread.php?t=1732579&highlight=rocker+box+inserts)) \\ It will go on clear but when it gets heated will turn to a white powder. Just a light film is all it takes. \\ Whenever it starts leaking it'll show up exactly where the leak is. \\ | * Degrease the bike until there's no oil remaining. \\ Then take some Soft n Dri (women's antiperspirant spray), talcum powder etc. and spray it around the rocker gaskets (or other suspected leaking area). ((ReddTigger of the XLFORUM http://xlforum.net/forums/showthread.php?t=1732579&highlight=rocker+box+inserts)) \\ It will go on clear but when it gets heated will turn to a white powder. Just a light film is all it takes. \\ Whenever it starts leaking it'll show up exactly where the leak is. \\ | ||
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| ==== Leaking out the breather vent(s) ==== | ==== Leaking out the breather vent(s) ==== | ||
| - | * If you've installed external breather vent hoses, make sure there are no kinks in the lines(s) that would stop or slow down the engine from breathing. \\ This would bottle up crankcase pressure and cause the internal pressure to implode the gaskets and create a leak. \\ Also make sure there are no obstructions (sludge) in any bends that may be in the lines. | + | * If you've installed external breather vent hoses, make sure there are no kinks in the lines(s) that would stop or slow down the engine from breathing. \\ This would bottle up crankcase pressure and cause the internal pressure to implode the gaskets and create a leak. \\ Also make sure there are no obstructions (sludge) in any bends that may be in the lines. \\ However, a few drips of oil out a vent hose while parked is normal. \\ This does not qualify as oil 'puking' out of the vent (which is more of a sudden rush of oil). |
| * In a perfect world, you would only have a slight oil mist coming out of the crankcase breather which could easily be routed into the air cleaner. \\ (keeping the E.P.A. happy by depositing the oil back into the engine instead of dripping on the ground). \\ On 91-up Sportsters, this problem has been almost eliminated with the OEM breathers venting into the A/C. \\ But the problem still appears on 90< Sportsters and newer models with external vent lines added. | * In a perfect world, you would only have a slight oil mist coming out of the crankcase breather which could easily be routed into the air cleaner. \\ (keeping the E.P.A. happy by depositing the oil back into the engine instead of dripping on the ground). \\ On 91-up Sportsters, this problem has been almost eliminated with the OEM breathers venting into the A/C. \\ But the problem still appears on 90< Sportsters and newer models with external vent lines added. | ||
| * The breather vents usually work fine on OEM engines. Problems have been noted however when bigger pistons / performance upgrades have been added. \\ Engine upgrades sometimes comes with extra baggage. \\ Bigger pistons brings with it more air displacement under the pistons (higher air volume in the lower case). | * The breather vents usually work fine on OEM engines. Problems have been noted however when bigger pistons / performance upgrades have been added. \\ Engine upgrades sometimes comes with extra baggage. \\ Bigger pistons brings with it more air displacement under the pistons (higher air volume in the lower case). | ||
| - | * Heavy oil flow from breather vent(s)only on cold start up could be from a sit-sumping condition where oil is draining into the sump when parked. \\ Your motor may be filling with oil while the bike is not running and it all gets pushed out the breather when you start the bike. | + | * Heavy oil flow 'puking' from the breather vent(s) only on cold start up could be from a sit-sumping condition where oil is draining into the sump when parked. \\ Your motor may be filling with oil while the bike is not running and it all gets pushed out the breather when you start the bike. |
| * Known causes for 'sit-sumping' include: | * Known causes for 'sit-sumping' include: | ||
| * Oil seeping past the oil pump check ball / check valve. Often this can be corrected by simply replacing the ball or valve in question. \\ In more severe cases the check-ball seat may need to be resurfaced. | * Oil seeping past the oil pump check ball / check valve. Often this can be corrected by simply replacing the ball or valve in question. \\ In more severe cases the check-ball seat may need to be resurfaced. | ||
