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Original Message
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RE: 428 adj. rocker frustration! |
By Travis Miller - 03/10/2001 10:52:54 PM; IP 152.163.195.194 |
Hydraulics need to be adjusted with the engine running. In order to keep from making an oily mess, cut the top open of an old valve cover. Bend the flap up and toward the exhaust side of the head making an area where the oil will be thrown up against and can run back down in the head. Install with a gasket to for a leak free seal. One other item you will need is a length of heater hose so you can listen to each rocker arm and pick out the ones that are clicking.
Loosen a rocker until you can hear it clicking. Slowly tighten it back down until it just stops clicking. For performance applications tighten the adjusting nut no more than 1/4 turn after the clicking stops. This will allow a few more RPM's before valve float occurs.
Valve float occurs when the engine is revved higher than the valve springs can close the valves. The instant this happens, the hydraulic lifter pumps totally full of oil shoving its top piece against its retainer. With the lifter pumped up, the valves are kept from closing all the way causing the engine to run poorly until the lifter bleeds back down.
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