Cylinder Head
Cylinder Head Reconditioning
Restore sealing, gas flow and valve operation. We recondition cylinder heads for rebuilds — strip, clean, crack inspection, pressure testing, valve and seat work, and precision surfacing.
What this covers
- Complete strip and cleaning of oil and coolant passages
- Crack detection and pressure testing
- Valve guide and valve seat reconditioning
- Deck surfacing for a true head-gasket face
- Valve refacing where the head assembly is supplied together
Overview
A true, sealed head is where performance starts
The cylinder head manages combustion sealing, valve sealing and gas flow. A warped deck, worn valve guides, or pitted seats cost compression and performance even in an otherwise fresh engine.
Head reconditioning restores the casting and its valve train interfaces: cleaned and crack-tested, the deck is surfaced true, guides and seats are reconditioned, and the head is made ready for reassembly with new sealing surfaces.
Reconditioned to measurement
Reconditioned to measurement. Not guesswork.
Decisions on cylinder head reconditioning are made from recorded measurements against specification — never from how a part “looks”.
Symptoms
When is this work needed?
These are the problems and symptoms that typically point to the component needing reconditioning work.
- Repeated head-gasket failure
- Compression loss traced to valve sealing
- Coolant loss without an external leak
- Combustion gases in the cooling system
- Worn valve guides causing oil consumption or valve noise
- A visibly warped or damaged deck face
Inspection
Inspected and measured before machining
5 checks and measurements inform the decision to machine — nothing is cut until the component has been assessed.
- Deck flatness and surface condition
- Valve guide bore wear
- Valve seat condition, width and concentricity
- Crack detection and coolant-pressure testing
- Oil and coolant passage condition after cleaning
Measurement & quality
Valve seats measured, not just cut
Seat width, angle and concentricity to the guide are what decide whether a valve seals on every cycle.
Verified after machining
- Seat run-out checked against the guide bore
- Deck flatness recorded before and after surfacing
- Guide-to-seat concentricity confirmed
PRT process
How we carry out the work
- 01
Receive & strip
Valve train, plugs and fittings are removed and the head is prepared for cleaning.
- 02
Clean & pressure test
The head is cleaned, inspected and tested for cracks and coolant-tightness.
- 03
Measure
Deck flatness, guide wear and seat condition are measured.
- 04
Recondition
Guides and seats are reconditioned and the deck is surfaced true.
- 05
Final check
Sealing surfaces and valve seats are verified before return.
Machinery & stations
Performed at the right station, with the right tooling
Detailed equipment make, model and specification sheets are pending from PRT. The functional stations involved in this service are:
- Valve guide & seat machining station
- Head surfacing set-up
- Pressure testing equipment
- Precision measuring & gauging area
Gallery
From the PRT shop floor
Authentic PRT photography will appear here as it is captured and approved. No stock imagery.
Cylinder Head Reconditioning work in progress at the PRT facility.
Real photography of the operation will appear here when PRT approves imagery.
Before-and-after records of PRT jobs are published as real projects.
Related services
Work that belongs with this one
Cylinder Block Reconditioning
Strip, inspect, measure and machine the engine's foundation. We recondition cylinder blocks for rebuilds — cleaning, crack detection, boring and honing, deck surfacing and, where needed, line boring of the main bearing housings.
View serviceEngine Assembly
A controlled, clean, torque-accurate build. We assemble reconditioned engines from measured components — so the finished unit leaves the shop built to specification and ready to run.
View serviceFAQ
Common questions
Straight answers to the questions we expect about this service.
Can a warped head be saved by machining?
If the casting is within its serviceable limits after surfacing, machining restores flatness. If removing the distortion would take the deck below minimum thickness, replacement is the safe answer.
Do you supply the head fully assembled?
Head assembly can be included where the customer supplies valves and related hardware. Guide, seat and surfacing decisions are confirmed during inspection.
Why is a pressure test important?
It verifies the casting is coolant-tight after machining — so a reconditioned head does not fail on first warm-up from an undetected crack or porous area.
Get a Quote
Discuss a cylinder head reconditioning job
Tell us the engine or component, its condition and what the rebuild needs to achieve. We will confirm the scope from an actual assessment.