Adjusting hydraulic lifters
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==Can I replace a damaged lifter with a new lifter?== | ==Can I replace a damaged lifter with a new lifter?== | ||
| − | [[File:Lifter clips 002.jpg|thumb|350px|left|Three styles of lifter cup retainers. The [http://www.truarc.com/pdfs/Truarc%20Catalog.pdf internal C-clip type] is stronger and should be used especially with solid lifters or when "zero lashing" lifters]][[File:Lifter expolded view.jpg|thumb|200px|right|Arrow points to check ball retainer]] | + | [[File:Lifter clips 002.jpg|thumb|350px|left|Three styles of lifter cup retainers. The [http://www.truarc.com/pdfs/Truarc%20Catalog.pdf internal C-clip type] is stronger and should be used especially with solid lifters or when "zero lashing" lifters.]][[File:Lifter expolded view.jpg|thumb|200px|right|Arrow points to check ball retainer]] |
Before you replace a lifter (which should only be done as a LAST resort), disassemble the lifter in question by pressing down on the pushrod cup and removing the snap ring. Invert and tap the lifter on a hard surface to remove the internal components. You will see a cup, spring and check ball assembly snapped onto the bottom of the center "piston" or "plunger" of the lifter. Often all that has happened is the cup assembly isn't fully seated onto the piston, or a speck of dirt has lodges between the check ball and seat. | Before you replace a lifter (which should only be done as a LAST resort), disassemble the lifter in question by pressing down on the pushrod cup and removing the snap ring. Invert and tap the lifter on a hard surface to remove the internal components. You will see a cup, spring and check ball assembly snapped onto the bottom of the center "piston" or "plunger" of the lifter. Often all that has happened is the cup assembly isn't fully seated onto the piston, or a speck of dirt has lodges between the check ball and seat. | ||
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{{warning}}<blockquote>According to Crane's Director of Valvetrain Research and Development, Mark Campbell, valve lifts of more than 0.530 inch at the valve with a 1.5:1 rocker can allow the lifter to fall deep enough into the lifter bore (because of the lobe's small base circle) that the steel retainer can lose its grip on the lifter body. This allows the lifter to spin in the bore and destroy the camshaft.</blockquote> | {{warning}}<blockquote>According to Crane's Director of Valvetrain Research and Development, Mark Campbell, valve lifts of more than 0.530 inch at the valve with a 1.5:1 rocker can allow the lifter to fall deep enough into the lifter bore (because of the lobe's small base circle) that the steel retainer can lose its grip on the lifter body. This allows the lifter to spin in the bore and destroy the camshaft.</blockquote> | ||
| − | Crane sells a long travel lifter, [http://www.summitracing.com/parts/CRN-10535-16/ p/n 10535-16a] that will work for reduced base circle/high lift cams. | + | Crane sells a long travel lifter, [http://www.summitracing.com/parts/CRN-10535-16/ p/n 10535-16a] that will work for reduced base circle/high lift cams. |
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==Before beginning you will need to know:== | ==Before beginning you will need to know:== | ||
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