Why does my Vortec valve lifter make a ticking sound?
This ticking sound is caused by the valve lifters, which are filled with oil during engine operation. When your engine sits, the oil can seep out of the lifters. When this happens, the lifter will tick at start-up until it refills with engine oil. Ticking lifters are not dangerous.
What makes a lifter tick on an overhead cam engine?
A lifter tick is caused when the push rod or camshaft doesn’t make continuous contact with the lifters. This can be because the lifter has become worn out, as is the case usually with hydraulic lifters, or the valve has come out of adjustment. Which can be the case with overhead cam engines or engines with sold lifters.
What should I do about my Vortec valve lifter?
GM’s Technical Service Bulletin #10-06-01-007B describes valve lifter diagnosis and replacement procedures for authorized dealerships. AC Delco is GM’s parts supplier. The AC Delco oil filter contains a anti-drain back valve that helps stop the oil from draining out of the valve lifters when the motor sits.
What do lifters do in a cam in block engine?
As found in a cam-in-block engine, lifters are responsible for transmitting the movement of the camshaft lobes to the pushrods. The pushrods actuate the rocker arms, which open the valves.
This ticking sound is caused by the valve lifters, which are filled with oil during engine operation. When your engine sits, the oil can seep out of the lifters. When this happens, the lifter will tick at start-up until it refills with engine oil. Ticking lifters are not dangerous.
Why does my Vortec valve lifter float when shut off?
Impact on the Engine Ticking lifters are not dangerous. The lifter is designed with a drain/fill hole that allows the lifter to float or fall based on oil pressure. An old trick is to run a thicker engine oil, which remains in the lifter longer after the engine is shut off.
What should I do if my valve lifter is making noise?
Flush out the old oil. Unscrew the cap under the car and place a container or bowl under the cap. Rinse your valve lifter with an engine flushing agent like Liqui Moly Engine Flush after the leaking of oil has stopped. Pour the new oil according to your engine specifications. This is probably the best solution to avoid noise from lifters.
As found in a cam-in-block engine, lifters are responsible for transmitting the movement of the camshaft lobes to the pushrods. The pushrods actuate the rocker arms, which open the valves.