Manual cylinder head volume measuring
This manual describes how to measure volume of a combustion chamber.
- Remove cylinder head from cylinder and make sure that piston and combustion chamber is clean.
- Check correct piston height. In this example the piston height is -0.5 mm. This means that top of the piston is 0.5 mm below the cylinder deck, when piston is at top dead centre.
- Mount cylinder head on cylinder and tighten bolts.
- Move piston at top dead centre (TDC).
- Fill pipet with liquid to 0 ml level.
- When liquid is in pipet, it has a curve at the top. Liquid level is determined by reading bottom level of the curve.
- Fill combustion chamber with liquid till top of the spark plug hole.
- It forms a meniscus or curvature.
- If meniscus is concave, or pointing downward, then bottom of meniscus is below top of the spark plug hole. This is not correct, adjust fluid level with more liquid.
- Here you can see that liquid is below top of the spark plug hole. This is not correct.
- Here you can see that liquid is leaking over the top of the spark plug hole. This is not correct. Use a pipet to draw some liquid out.
- The correct level of liquid is when there is a convex meniscus, or upward pointing meniscus. Liquid is a little bit curved over the top of the spark plug hole.
- Here you can see that liquid is a little bit over the top of the spark plug hole. This is correct.
Click here for the Pricelist download page.
- Now you can read volume on the pipet graduation. Measured volume is 11.40 ml = 11.40 cc with a piston height -0.5 mm.
Measured volume of 11.40 cc is not the volume of combustion chamber.
- Measured volume is volume of combustion chamber including volume of the spark plug hole.
- Volume given for all VHM inserts is volume of combustion chamber including volume of the spark plug hole.