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techtalk:ref:oil10b [2020/10/04 17:58] hippysmack created |
techtalk:ref:oil10b [2024/01/19 03:17] (current) hippysmack |
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| ====== REF: Oiling & Lubrication - Sub-10B ====== | ====== REF: Oiling & Lubrication - Sub-10B ====== | ||
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| + | ====== Bad Ring Seal vs Wet sumping ====== | ||
| + | ===== Bad Ring Seal vs Wet sumping ===== | ||
| + | Wet sumping and oil spatters from the crankcase are two different things. ((Jorgen of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/38153-xr750-883-series-race-engine-venting-etc/page7?t=75740&highlight=reed+valve&page=7)) \\ | ||
| + | Daily driver owners with oily air cleaners can get these two ideas confused. \\ | ||
| + | Bad ring seal helps evaquate the sump from oil. \\ | ||
| + | But on the other hand, it increases the flow rate through the crank vent system to such levels that a lot of oil droplets join in. \\ | ||
| + | Apart from leaking cylinder base gaskets and push rod tubes, large blowby and high crank pressure also contributes to even larger ring leakage. \\ | ||
| + | It's a vicious circle. \\ | ||
| + | Sometimes owners who struggle with an oily air cleaner problem seem more concerned with wet sumping. \\ | ||
| + | When they should concentrate in evaluating and improving ring seal. \\ | ||
| + | And ideally also route the crankcase breather lines to a catch tank instead of the A/C. \\ | ||
| + | Re-routing the vent(s) from the breather to a catchtank has many advantages. \\ | ||
| + | Not least it is a powerful tool to monitor the state of the engine. \\ | ||
| + | There should be more water than oil in the catch tank. \\ | ||
| + | At least if air temp is 20C or below. \\ | ||
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