Valve Jobs

What this service addresses

Valve sealing helps separate the combustion chamber from the intake and exhaust passages. Wear or damage at that contact area can contribute to compression problems, but a running symptom does not prove that the seats alone are at fault. Copper State Machine Shop includes valve jobs in its cylinder head services. For a DIY build, discuss the whole head’s condition before deciding on valve work alone.

Before deciding on the work

• Valve faces and seat condition need to be considered as a pair rather than selecting work from symptoms alone.
• Guide wear and valve movement can influence seating; the scope must account for related component condition.
• Burnt or damaged valves, prior head work and the engine application can affect the parts and work needed.

What to bring or include

• The cylinder head with its valves and associated parts, identified so components are not mixed.
• Engine details and any compression or leak-down observations you already have.
• Replacement valves or head parts already purchased, plus notes on previous head repairs.

Planning the job

1. 01

   Describe the engine symptoms and whether the head is already removed.

2. 02

   Discuss valve, seat and related wear so the proposed job addresses more than one contact surface in isolation.

3. 03

   Agree on the valve-work scope and whether resurfacing or a wider head rebuild should be included in the request.

Valve Jobs: common questions

Related services

• Cylinder Head Rebuilding
• Cylinder Head Resurfacing
• Cylinder Honing