Lifters
(→Replacing lifters: Add image) |
(→Hydraulic lifter: Add image) |
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The hydraulic lifter was a mainstay for over 40 years in domestic automobile engines. Its design allowed a basically maintenance free valve train. They were quiet and reliable. | The hydraulic lifter was a mainstay for over 40 years in domestic automobile engines. Its design allowed a basically maintenance free valve train. They were quiet and reliable. | ||
[[File:Lifter cutaway preload.jpg|border|400px|right]] | [[File:Lifter cutaway preload.jpg|border|400px|right]] | ||
| − | + | [[File:Pontiac service manual lifter diagram.jpg]] | |
====Fast bleed down lifter==== | ====Fast bleed down lifter==== | ||
An example of a fast bleed down hydraulic lifter is the [http://www.rhoadslifters.com/ Rhodes] lifter. The Rhodes lifter accomplishes the fast bleed down by putting a groove on the plunger by EDM (electron discharge machining) or laser. This groove allows the oil to bleed out of the chamber at a faster, yet controlled rate. This allows the lifter to vary the lift and duration of the cam at lower RPM, typically from idle to ~3000 RPM or so, depending on the valve spring pressure and oil viscosity. | An example of a fast bleed down hydraulic lifter is the [http://www.rhoadslifters.com/ Rhodes] lifter. The Rhodes lifter accomplishes the fast bleed down by putting a groove on the plunger by EDM (electron discharge machining) or laser. This groove allows the oil to bleed out of the chamber at a faster, yet controlled rate. This allows the lifter to vary the lift and duration of the cam at lower RPM, typically from idle to ~3000 RPM or so, depending on the valve spring pressure and oil viscosity. | ||
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