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Lincoln Ls Engine Exhaust Valves

Lincoln Ls Engine exhaust valves

Starting at low prices, AutoBuffy stocks multiple engine exhaust valves from top OE-quality brands for the Lincoln Ls. The exhaust valve opens at the end of each combustion cycle to release burned gases from the cylinder. A worn or burnt exhaust valve causes compression loss, misfires, and eventually serious engine damage if left unaddressed.

Signs your Lincoln Ls needs new exhaust valves

  • Rough idle or persistent misfire on one or more cylinders that does not resolve with new spark plugs or coils
  • Noticeable loss of power under acceleration, especially when the engine is under load
  • Popping or backfiring through the exhaust, indicating unburned gases escaping past a leaking valve
  • Failed compression or leak-down test showing low compression in one or more cylinders
  • Excessive oil consumption with bluish exhaust smoke, often from a valve that is no longer seating cleanly
  • Ticking or tapping noise from the cylinder head that worsens as engine temperature rises

Which exhaust valve should you buy for your Lincoln Ls?

Exhaust valves run hotter and face more chemical stress than intake valves, so material and coating matter more than price alone. The right choice depends on whether your Lincoln Ls is used for daily driving, high-performance applications, or whether the engine has been modified for increased power output. Always verify the exact valve dimensions — head diameter, stem diameter, and overall length — for your specific engine before ordering.

OEM-spec steel replacement
Best for
Daily drivers needing a straight factory restore
What you get
Correct dimensions, hardness, and finish to match original specs; straightforward drop-in fit
Stainless steel (one-piece)
Best for
Higher mileage engines and moderate performance use
What you get
Improved heat and corrosion resistance over standard steel; longer service life in stock or lightly modified engines
Sodium-filled hollow-stem valve
Best for
Turbocharged, supercharged, or high-rpm engines
What you get
Sodium core transfers heat away from the valve head more efficiently, reducing the risk of burning under high thermal load
Inconel or high-alloy performance valve
Best for
Forced-induction builds, track use, or heavily modified engines
What you get
Extreme heat and oxidation resistance; designed for combustion temps that would quickly degrade standard or stainless valves

Replacing exhaust valves on a Lincoln Ls

Advanced⏱ 4–8 hours (plus machine shop time if applicable)Valve spring compressorValve stem seal installerCylinder head gasket setTorque wrenchLapping tool and lapping compound

Exhaust valve replacement begins with removing the cylinder head, which requires draining coolant, disconnecting the exhaust manifold, and disassembling the valvetrain. Once on a bench, a valve spring compressor is used to release each keeper, allowing the old valve to be removed and the new one installed with fresh seals. The head should be inspected — and ideally resurfaced — at a machine shop before reinstallation, and all fasteners must be tightened in the correct sequence to manufacturer-specified torque ranges.

Frequently asked questions

How much does it cost to replace exhaust valves on a Lincoln Ls?
Exhaust valves for the Lincoln Ls start at low prices for the parts alone. Because the job requires removing the cylinder head and disassembling the valvetrain, professional labor costs are substantial — often several hours of shop time. Budget for a valve job at the machine shop and new gaskets on top of the valve price.
Can I replace just one exhaust valve on a Lincoln Ls, or should I do them all?
Because the cylinder head must come off regardless, most mechanics recommend replacing all exhaust valves on that head at the same time. The labor cost is the same whether you do one or all, and valves on a high-mileage engine tend to be similarly worn throughout. Replacing them together prevents a repeat teardown shortly after.
What causes an exhaust valve to burn or fail on a Lincoln Ls?
Burnt exhaust valves are most often caused by a valve that is not seating fully — preventing it from transferring heat to the head — due to worn valve seats, incorrect valve lash, or a weak valve spring. Detonation, lean fuel mixtures, overheating, and poor-quality coolant management are other common contributors to premature exhaust valve failure.
Do exhaust valves need to be lapped or machined when installed on a Lincoln Ls?
Yes, in most cases. New exhaust valves should be lapped to their seats to ensure a gas-tight seal, and the valve seats themselves should be inspected for wear or recession. If the head is already off, having a machine shop perform a complete valve job — including seat grinding and resurfacing — is strongly recommended for reliable long-term sealing.
How long do exhaust valves last on a Lincoln Ls?
Exhaust valves in a well-maintained engine can last the life of the vehicle — often well over 100,000 miles. Premature failure is almost always caused by a related issue: incorrect valve lash, a failing valve seal, coolant loss, persistent detonation, or neglected oil changes. Addressing the root cause is essential when replacing valves, or the new parts will fail early.
Is replacing exhaust valves on a Lincoln Ls a DIY job?
Exhaust valve replacement requires removing the cylinder head, compressing valve springs with a specialized tool, and typically having machine shop work performed on the head. It is an advanced job that demands engine teardown experience, proper tooling, and a torque-accurate reassembly. Most home mechanics with engine rebuild experience can complete it, but it is not a beginner task.

More parts for your Lincoln Ls

Engine Coolant Thermostat Housing AssemblyHeadlight Wiring HarnessEngine Timing Chain TensionerControl Arm KitBrake Fluid Pressure SensorHVAC Heater RelayMass Air Flow SensorIgnition Coil

Engine exhaust valves for other Lincoln models

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