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techtalk:ref:engmech01q [2019/02/18 05:54] hippysmack [Roller end manuf. defect repair] |
techtalk:ref:engmech01q [2024/01/14 18:24] hippysmack |
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====== Tappet Flats ====== | ====== Tappet Flats ====== | ||
**This is in consideration of induced noise from the use of high lift cams**. \\ | **This is in consideration of induced noise from the use of high lift cams**. \\ | ||
- | The factory lifter is up to the job from the point of view of the hydraulics. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1510606&page=2)) \\ | + | The factory lifter is up to the job from the point of view of the hydraulics. ((aswracing of the XLFORUM https://www.xlforum.net/forum/vendors/hammer-performance/139198-well-been-doing-some-thinking-excess-valvetrain-noise/page2?t=1510606&page=2)) \\ |
However, the factory lifter's weaknesses are lack of available travel and less durable axle bearings. \\ | However, the factory lifter's weaknesses are lack of available travel and less durable axle bearings. \\ | ||
It's possible to machine the flat longer on a stock lifter. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=341901)) \\ | It's possible to machine the flat longer on a stock lifter. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=341901)) \\ | ||
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The longer flats also allow higher lifts. | The longer flats also allow higher lifts. | ||
- | ===== Roller end manuf. defect repair ===== | ||
- | It seems aftermarket lifters have a tendency to be wide at the roller end (at the opposite pins holding the roller). \\ | ||
- | Measure them before installing to be sure they won't scratch the lifter bore when turned home. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?p=5283285&highlight=lifter+pins#post5283285)) \\ | ||
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- | |{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_3_by_hippysmack.jpg?direct&300|}}| | ||
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- | Upon measuring, the main body on this particular set of Fueling lifters were .903" on the main body with the roller end being .9035". \\ | ||
- | They were all chucked in a lathe, and light sanded with medium grit sanding tape which brought them down to .903" all around the base. | ||
- | |{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_4_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_5_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_6_by_hippysmack.jpg?direct&300|}}| | ||
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- | 91-Up lifters are not in replaceable lifter blocks. So wear in the bore is critical. \\ | ||
- | The FSM says since this model has no tappet bushing, the only way to fix 'out of service bores' are bigger tappets or a new case. \\ | ||
- | A hone for the bore was made with the balls removed from a ball hone and 400 grit sandpaper attached to the shaft end with Gorilla glue. \\ | ||
- | |{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_7_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_9_by_hippysmack.jpg?direct&300|}}| | ||
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- | |{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_10_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_11_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:sizing_a_fueling_lifter_base_12_by_hippysmack.jpg?direct&300|}}| | ||
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- | |I have my prototype hone drying....400 grit Gorilla glued to the ball hone shaft. | ||
===== Other Useful Links ===== | ===== Other Useful Links ===== | ||
This is a very good XLFORUM discussion thread on [[http://xlforum.net/forums/showthread.php?t=1933342&highlight=disassembling+lifters|lifters and high lift cams]]. \\ | This is a very good XLFORUM discussion thread on [[http://xlforum.net/forums/showthread.php?t=1933342&highlight=disassembling+lifters|lifters and high lift cams]]. \\ |