---
kind: "section"
citation: "30 C.F.R. § 36.24"
title: "30"
number: "36.24"
heading: "Engine joints."
url: "https://uscodex.org/cfr/30/36.24"
---

# §36.24. Engine joints.

- (a) **Cylinder head.** The joint between the cylinder head and block of the engine shall be fitted with a metal or metal-clad gasket satisfactory to MSHA held securely in position by through bolts or other suitable means to prevent a change in alignment. This joint shall provide an adequate flame barrier with the gasket in place.
- (b) **Valve guides.** Valve guides shall be long enough to form an adequate flame barrier along the valve stem.
- (c) **Gaskets.** All metal or metal-clad gaskets shall maintain their tightness during repeated explosions within the engine and its intake and exhaust systems to prevent the propagation of flame.

## Notes

### Authority

Authority: 30 U.S.C. 957, 961.

### Source

Source: Schedule 31, 26 FR 645, Jan. 24, 1961, unless otherwise noted.