4.6L gasoline V8 (Modular, 2-valve and 3-valve)
Ford 4.6L Modular V8 Engine Repair & Replacement
The 4.6L Modular V8 was used across Ford trucks, SUVs and cars for many years. The 2-valve versions are known for spark plugs that can blow out of the cylinder head. We diagnose and repair 4.6L engines, including thread repair and replacement when needed.
Common applications
- Ford F-150 (1997–2010)
- Ford Expedition and E-Series vans
- Crown Victoria, Mustang and Explorer (select years)
Known problems and symptoms
Spark plug ejected from head
A known 2-valve issue; the thread can often be repaired with an insert.
Misfires
Coil-on-plug failures and intake gasket leaks.
How we diagnose it
- Misfire data
- Plug thread inspection
- Compression test
Repair and replacement options
- Spark plug thread repair
- Coil and intake repairs
- Engine replacement
Ford 4.6L Modular V8 repair topics
Ford 4.6L engine diagnostics
Testing-first diagnosis for Ford 4.6L running, noise and warning-light problems.
4.6L misfire & spark plug blow-out repair
Misfires and ejected spark plugs on the 4.6L 2-valve.
Ford 4.6L engine repair, rebuild or replacement
How we decide between repairing, rebuilding or replacing a Ford 4.6L with major internal damage.
Request a quote
Frequently asked questions
Can a blown-out spark plug be fixed without a new head?
Often, yes — a thread insert repair is common. We inspect the damage first.