Differences
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techtalk:ref:oil05a [2019/06/12 18:16] hippysmack |
techtalk:ref:oil05a [2019/07/17 04:29] hippysmack ↷ Links adapted because of a move operation |
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| Just adding a cooler may not solve this problem. \\ | Just adding a cooler may not solve this problem. \\ | ||
| You need to get the oil out of the crankcase so it does not interfere with motion of the crank and cause the heating problem in the first place. \\ | You need to get the oil out of the crankcase so it does not interfere with motion of the crank and cause the heating problem in the first place. \\ | ||
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| + | To regulate the oil pressure you have to bleed some of it off. ((aswracing of the XLFORUM http://xlforum.net/forums/showpost.php?p=4341107&postcount=6)) \\ | ||
| + | 4-speeds have a spring loaded pressure regulator built into the oil filter pad that does exactly that. \\ | ||
| + | There's a passage from the filter pad into the cam box. \\ | ||
| + | If the pressure gets high enough, the regulator opens and bleeds off some of the pressurized oil, dropping it into the cam box. \\ | ||
| + | Then it eventually drains down to the crankcase and gets pumped back to the tank. \\ | ||
| + | They did away with this on 5-speed XL's though. \\ | ||
| + | Evo Big Twins have a spring loaded bleed-off regulator, as do Twinkies, XR1200's, and 08-up Buells. \\ | ||
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| Some have found it useful to build bypass circuits to bleed off excess oil pressure and send it back to the tank. \\ | Some have found it useful to build bypass circuits to bleed off excess oil pressure and send it back to the tank. \\ | ||
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| Later, a cam chest breather mod was discovered by Deimus of the XLFORUM that was deemed a fix for better crankcase venting. \\ | Later, a cam chest breather mod was discovered by Deimus of the XLFORUM that was deemed a fix for better crankcase venting. \\ | ||
| That mod did reduce crankcase pressure allowing for lower engine temps. | That mod did reduce crankcase pressure allowing for lower engine temps. | ||
| - | You can read about it here in the Sportsterpedia: [[techtalk:ref:oil05d|Installing the Ultimate Crankcase Vent]]. \\ | + | You can read about it here in the Sportsterpedia: [[techtalk:ref:engmech05d|Installing the Ultimate Crankcase Vent]]. \\ |
| **Coincidence**? \\ | **Coincidence**? \\ | ||
