Product Features:

1.Application-Used to measure installed valve spring height conveniently and accurately for most V8s. With 1.600'' - 2.100'' range.

2.Easy to use-Install our 4929 Height Mic just like you would a valve spring, then expand the tool until it has seated the valve, locks and retainer.

3.Precise design-This simulated seat pressure allows ultra precise readings.It can measures 1.600 inch-2.200 inch installed height.The tool is then read like a micrometer and is accurate to .001".

4.High quality-Made of high quality carbon steel with black finish, great strength and light weight

5.Satisfaction guarantee-If you're not 100% satisfied with this 4929 Valve Spring Height Micrometer , simply return it for a full refund in 30 days, guarantee with 12 months’ warranty.

Product Description:

Using Instruction

Before installing the spring on the cylinder heads, check the installed spring height：

1. Install 1 intake and 1 exhaust valve.

2. Get the correct retainer for the spring and correct locks for the retainer.
Pull the retainer tightly against the valve locks while holding the valve assembly steady.

3. Place 4929 height micrometer or a snap gauge and a pair of calipers on the valve
between the spring seat and the outside step of the retainer and turn the height micrometer counterclockwise to establish valve spring height.

After you have measured all the valves, find the shortest height.
This will become the spring’s installed height on your heads.

4. Add shims until proper height is obtained on the remaining valves.

5. Take the height micrometer and retainer to valve spring tester and check valve spring load at that height.

Important note!!!!

Since the retainer is installed in the spring when checking the spring loads,
make certain that the thickness of the retainer is not included when calculating the installed height and is accounted for when compressing the spring.

The spring load checker will show to be higher with the spring installed at the correct height.