Lifters
(→Replacing lifters: clean up; add text) |
(Add images, text.) |
||
| Line 77: | Line 77: | ||
Once the clip is out, the pushrod cup and metering disc can be removed, followed by the inner plunger assembly. The plunger can be stubborn, tapping the open end against a cloth-covered wood block will usually bring the plunger to the top of the body allowing it to be coaxed out the rest of the way. | Once the clip is out, the pushrod cup and metering disc can be removed, followed by the inner plunger assembly. The plunger can be stubborn, tapping the open end against a cloth-covered wood block will usually bring the plunger to the top of the body allowing it to be coaxed out the rest of the way. | ||
| − | [[File: | + | [[File:Check details.jpg|thumb|300px|left|Check ball, spring and retainer cup in order]] |
| − | On the bottom of the plunger you will see a cup and a stiff spring. Remove the spring and set it aside. Inside the cup | + | On the bottom of the plunger you will see a cup and a stiff spring. Remove the spring and set it aside. Inside the cup is a small spring and check ball (left). Some designs use a small disc instead of a ball, however check "ball" will be used herein. The cup is a press-fit onto the plunger, it snaps off and back on. With a lifter that has collapsed or is noisy, often all that has happened is the cup assembly isn't fully seated into the recess on the bottom of the plunger, or a speck of dirt has lodged between the check ball and seat. |
Remove the cup using a pick and see that the tiny spring isn't bent, kinked or missing, and that the check ball is there and is smooth and shiny, and that the seat on the plunger that the ball seals doesn't have any ridges, burrs, or imperfections that would prevent the ball from seating properly. <br style="clear:both"/> | Remove the cup using a pick and see that the tiny spring isn't bent, kinked or missing, and that the check ball is there and is smooth and shiny, and that the seat on the plunger that the ball seals doesn't have any ridges, burrs, or imperfections that would prevent the ball from seating properly. <br style="clear:both"/> | ||
===Lifter reassembly=== | ===Lifter reassembly=== | ||
| − | The plunger gets the cup containing the tiny spring and check ball (no lint!) snapped back into place. Be sure it's seated squarely on the bottom of the plunger. It doesn't take a lot of force, just be sure it's on all the way and sits square on the plunger. | + | [[File:Lifter drawing.jpg|thumb|400px|right|Lifter components in order of reassembly]]The plunger gets the cup containing the tiny spring and check ball (no lint!) snapped back into place. Be sure it's seated squarely on the bottom of the plunger. It doesn't take a lot of force, just be sure it's on all the way and sits square on the plunger. |
Lightly lube the plunger using motor oil, put the stiff spring over the check ball cup on the bottom of the plunger, then insert the plunger assembly into the lifter body (again, no lint). Work the plunger up and down a few times (it'll take a minute to bleed the air from it) to verify it works smoothly and doesn't hang up or have any grittiness. | Lightly lube the plunger using motor oil, put the stiff spring over the check ball cup on the bottom of the plunger, then insert the plunger assembly into the lifter body (again, no lint). Work the plunger up and down a few times (it'll take a minute to bleed the air from it) to verify it works smoothly and doesn't hang up or have any grittiness. | ||
| Line 89: | Line 89: | ||
Next replace the metering disc and then the pushrod cup. Using a wooden dowel or a pushrod, depress the pushrod cup and reinstall the retainer clip. Again- be careful to not launch the clip into orbit. | Next replace the metering disc and then the pushrod cup. Using a wooden dowel or a pushrod, depress the pushrod cup and reinstall the retainer clip. Again- be careful to not launch the clip into orbit. | ||
| − | At this point the lifter can be depressed and should return smoothly to being fully extended. | + | At this point the lifter can be depressed and should return smoothly to being fully extended. <br style="clear:both"/> |
{{Note1}}If trying to repair a bad lifter and the lifter's inner bore is OK but the plunger is found to be unrepairable, replace the plunger assembly from another identical lifter and reuse the lifter body, then replace the lifter back on the same lobe it came from. | {{Note1}}If trying to repair a bad lifter and the lifter's inner bore is OK but the plunger is found to be unrepairable, replace the plunger assembly from another identical lifter and reuse the lifter body, then replace the lifter back on the same lobe it came from. | ||
Your Privacy Choices