From the manufacturer
17122490 LS7 Lifters Set of 16 GM Original Equipment Engine Hydraulic Valve Regulator Fit LS1 LS2 LS3 LS6 LS7 LQ4 LQ9 LY5 LY6 LM7 4.8 5.3 5.7 6.0 5233745 5234670 JB2079 HL123 JB2270 HL112
Mechanical elevator and hydraulic elevator are compared
- 1 It's quieter.
- 2 low maintenance.
- 3 can adjust the thermal expansion of the engine.
- 4 as a built-in shock absorber can reduce pressure
- On the valve train.
- 5 be able to design a "bleeding rate"
- In order to adapt to different engine speed range.
Why choose hydraulic lift
Maintenance and low cost are the first consideration.
Mechanical cam design requires running clearance or
Valve clearance, while hydraulic tappet is the opposite.
When the rocker arm assembly is properly tightened
When positioning, the push rod must occupy all the clearance
Falling into the hydraulic lifter, resulting in the push rod
In most cases, the seat can be moved down 0.020 inch to 0.060 inch
Adjust the preload
LS series as V8 engine
When closing the clearance between piston and valve, the preload should be
Step by step, 1 / 4 turn at a time, allowing the lift
Bleed between adjustments. This can be avoided
The valve may be bent.
The hydraulic tappet elevator must be checked frequently
Many things will affect the lift, after the cam, hydraulic tappet and push rod are in place, install
For your rocker arm assembly, tighten all valve train bolts
In the right order. Choose a cylinder you want to go to
Check it out. Turn the engine in the normal direction by hand
Rotate until both valves are closed. you are here
Compression cycle of the cylinder. (in this position, the valve
The spring is at least the minimum pressure they have to do the job
It's a little easier.) Wait a few minutes for the lift Bleeding
Why the correct viscosity and proper glue breaking
Important matters of hydraulic roller cam running-in:
1 Many noisy lift complaints
Actually, the wrong viscosity was used. Thicker, taller
Viscosity oil (such as 20W-50) will not have enough oil to flow into the tappet
Too little viscosity, such as 5W-30, will make the elevator
It is easy to "bleed". But there is a common misunderstanding
The results show that high-performance engines require 20W-50, and the results show 10W-40
Provide the correct viscosity for the hydraulic tappet.
2 The best protection for hydraulic roller lifts is to use a complete formula
Run-in oil. Another reason is that the elevators are noisy and poor
Appears as debris caught by the elevator. The number of door breaks has increased tenfold
Particles will be generated during the running-in process, most of which will disappear
Via the lift. Proper oil running-in will not severely wear parts, resulting in
Excess crumbs. Change the oil and filter after running-in
Get wear particles out of the engine within 500 miles
They can cause lasting damage.
3 These same recommendations apply to ramjet engines
Steel swing arm. High friction at the pivot point
A lot of heat, so proper lubrication is essential for their running-in.
