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techtalk:evo:engmech02d [2022/09/25 06:34] hippysmack [Why 1986-up Lifters Clack on Initial Startup] |
techtalk:evo:engmech02d [2022/09/25 06:37] (current) hippysmack [Why 1986-up Lifters Clack on Initial Startup] |
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| So even if you do have the lifter fully pumped before installing it, it won't be that way when you fire up the engine. \\ | So even if you do have the lifter fully pumped before installing it, it won't be that way when you fire up the engine. \\ | ||
| In fact, they will all be low of oil and most likely will bang at such a rate to sound like they are about to come out of there. \\ | In fact, they will all be low of oil and most likely will bang at such a rate to sound like they are about to come out of there. \\ | ||
| - | |||
| - | **When installing lifters in the motor, it's best to make sure each one is fully pumped up** (full of oil and plungers holding tight, not spongy). \\ | ||
| - | This will ensure each lifter WILL pump up and is not faulty (bad thing to learn on a too late notice). \\ | ||
| - | |||
| - | **You can't pour oil down the pushrod tubes and fill the lifter's lower pressure chamber**. \\ | ||
| - | That won't do as much good as adding assembly lube to the rocker arms / shafts and bushings before buttoning up. \\ | ||
| - | That gives needed lube to the moving parts whilst waiting for the lifters to pump up fully and send oil up there. \\ | ||
| - | You can pre-fill the lifters that way but that oil may just drain to the cam chest before the motor is fired up. \\ | ||
| - | Oil needs to completely fill the lower chamber and purge any air that is in there (not the reservoir above). \\ | ||
| - | Pouring oil down the pushrod tubes may or may not fill the plunger reservoir due to the restricted disc under the pushrod cup. \\ | ||
| - | But even if you could fill the reservoir, it's above the check valve that needs downward pressure to open and let oil come in from the reservoir. \\ | ||
| - | And installing the lifters will bleed that down anyway. \\ | ||
| **On older type lifters one could stick a thin rod thru the center of the lifter down to the check valve and open it to bleed off pressure / air**. \\ | **On older type lifters one could stick a thin rod thru the center of the lifter down to the check valve and open it to bleed off pressure / air**. \\ | ||
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| All that would do is fill the pushrods thus the oil reservoir above the check valve (if oil can make it past the restricted disc under the pushrods. \\ | All that would do is fill the pushrods thus the oil reservoir above the check valve (if oil can make it past the restricted disc under the pushrods. \\ | ||
| - | You can see the restriction disc below that buttons up against the bottom of the pushrod cup. \\ | + | **When installing lifters in the motor, it's best to make sure each one is fully pumped up** (full of oil and plungers holding tight, not spongy). \\ |
| - | Also, check the link at the top of the page to view more information on how these lifters operate. \\ | + | This will ensure each lifter WILL pump up and is not faulty (bad thing to learn on a too late notice). \\ |
| - | + | ||
| - | {{:techtalk:ref:svcproc:lifter_disassembly_7_by_hippysmack.jpg?direct&300|}} {{:techtalk:ref:svcproc:lifter_disassembly_11_by_hippysmack.jpg?direct&300|}} ((photos by Hippysmack)) \\ | + | |
| Some say to soak the lifters in a container of oil overnight. \\ | Some say to soak the lifters in a container of oil overnight. \\ | ||
| Others will dunk each lifter in a container of oil working the plunger up and down until it doesn't move down at all (faster and more accurate anyway). \\ | Others will dunk each lifter in a container of oil working the plunger up and down until it doesn't move down at all (faster and more accurate anyway). \\ | ||
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| But there is more information needed and the video doesn't go into a lot of detail. \\ | But there is more information needed and the video doesn't go into a lot of detail. \\ | ||
| [[https://redirect.viglink.com/?format=go&jsonp=vglnk_166408707013813&key=9fa92fd6842c96bfca4170b23bf22b4d&libId=l8gwhwce01000bmq000DLtms9a4fmtjlc&loc=http%3A%2F%2Fxlforum.net%2Fforums%2Fshowthread.php%3Ft%3D2080806%26highlight%3Dlifter%2Bnoise%26page%3D2&v=1&opt=true&out=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DfMoRaHJRrhc&title=Rubbermount_EVO%20No%20Oil%20through%20pushroods%20-%20Page%202%20-%20The%20Sportster%20and%20Buell%20Motorcycle%20Forum%20-%20The%20XLFORUM%C2%AE&txt=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DfMoRaHJRrhc|Click on this link to view the video]]. \\ | [[https://redirect.viglink.com/?format=go&jsonp=vglnk_166408707013813&key=9fa92fd6842c96bfca4170b23bf22b4d&libId=l8gwhwce01000bmq000DLtms9a4fmtjlc&loc=http%3A%2F%2Fxlforum.net%2Fforums%2Fshowthread.php%3Ft%3D2080806%26highlight%3Dlifter%2Bnoise%26page%3D2&v=1&opt=true&out=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DfMoRaHJRrhc&title=Rubbermount_EVO%20No%20Oil%20through%20pushroods%20-%20Page%202%20-%20The%20Sportster%20and%20Buell%20Motorcycle%20Forum%20-%20The%20XLFORUM%C2%AE&txt=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DfMoRaHJRrhc|Click on this link to view the video]]. \\ | ||
| + | |||
| + | **You can't pour oil down the pushrod tubes and fill the lifter's lower pressure chamber**. \\ | ||
| + | That won't do as much good as adding assembly lube to the rocker arms / shafts and bushings before buttoning up. \\ | ||
| + | That gives needed lube to the moving parts whilst waiting for the lifters to pump up fully and send oil up there. \\ | ||
| + | You can pre-fill the lifters that way but that oil may just drain to the cam chest before the motor is fired up. \\ | ||
| + | Oil needs to completely fill the lower chamber and purge any air that is in there (not the reservoir above). \\ | ||
| + | Pouring oil down the pushrod tubes may or may not fill the plunger reservoir due to the restricted disc under the pushrod cup. \\ | ||
| + | But even if you could fill the reservoir, it's above the check valve that needs downward pressure to open and let oil come in from the reservoir. \\ | ||
| + | And installing the lifters will bleed that down anyway. \\ | ||
| + | You can see the restriction disc below that buttons up against the bottom of the pushrod cup. \\ | ||
| + | Also, check the link at the top of the page to view more information on how these lifters operate. \\ | ||
| + | |||
| + | {{:techtalk:ref:svcproc:lifter_disassembly_7_by_hippysmack.jpg?direct&300|}} {{:techtalk:ref:svcproc:lifter_disassembly_11_by_hippysmack.jpg?direct&300|}} ((photos by Hippysmack)) \\ | ||
| **Oil flows slow when not at operating temp** (when you would hear the clacking as mentioned), slower when at room temp, slower in cold weather etc. \\ | **Oil flows slow when not at operating temp** (when you would hear the clacking as mentioned), slower when at room temp, slower in cold weather etc. \\ | ||
