Head Gasket Replacement
ProfessionalHead gasket replacement involves removing the cylinder head from the engine block to replace the failed gasket that seals the combustion chambers, oil passages, and coolant passages. A blown head gasket allows coolant and oil to mix or leak into the cylinders, causing overheating, white exhaust smoke, milky oil, and severe engine damage if not repaired.
Estimated time: 8-16 hours
Cost Breakdown
DIY (Parts Only)
$200 - $600
Professional Shop
$1200 - $3000
Prices vary by location, vehicle make/model, and shop rates.
Tools Needed
- Socket wrench set
- Torque wrench (ft-lb accurate)
- Engine hoist or lift
- Head bolt set
- Gasket scraper and surface cleaner
- Straightedge and feeler gauge
Step-by-Step Instructions
Drain the cooling system and engine oil. Disconnect the battery and label all wiring, hoses, and vacuum lines connected to the cylinder head.
Remove the intake manifold, exhaust manifold, valve cover, timing belt or chain components, and any other accessories attached to the head.
Loosen the cylinder head bolts in the reverse of the tightening sequence. Remove the head bolts and carefully lift the cylinder head off the engine block.
Remove the old head gasket and thoroughly clean both the head and block mating surfaces using a scraper and surface cleaner. Remove all debris from the bolt holes.
Check the cylinder head for warpage using a straightedge and feeler gauge. If it exceeds the maximum specification, the head must be machined flat at a machine shop.
Install the new head gasket (ensure correct orientation) and carefully set the cylinder head in place. Install new head bolts (torque-to-yield bolts cannot be reused).
Torque the head bolts in the manufacturer's specified sequence and stages. Reassemble all components in reverse order.
Refill oil and coolant, then start the engine and carefully monitor for leaks, overheating, and proper operation. Recheck head bolt torque after the engine has heat-cycled if specified.
Tips & Warnings
- This is one of the most complex engine repairs. Professional service is strongly recommended unless you have significant mechanical experience.
- Always use new head bolts if they are the torque-to-yield type — they stretch permanently during installation and cannot be reused.
- Have the cylinder head checked and resurfaced at a machine shop even if it appears flat — this ensures a proper seal.
- Diagnose the cause of the head gasket failure (usually overheating) and address it before reassembly to prevent recurrence.
Related OBD-II Codes
Related Recalls
1 Active Recall — 2026 Ford F-150
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
Ford Motor Company (Ford) is recalling certain 2021-2026 F-150, 2022-2026 F-250 SD, F-350 SD, F-450 SD, F-550 SD, Maverick, 2024-2026 Ranger, 2023-2026 F-600 SD, 2022-2027 Lincoln Navigator, Expedition, and 2026 E-Transit vehicles. When towing a trailer, the integrated trailer module (ITRM) may lose communication with the vehicle, possibly causing a loss of brake and turn signal lights, or a loss of brake function. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, " Lamps, Reflective Devices, and Associated Equipment."
Remedy: The integrated trailer module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters are expected to be mailed March 17, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26C10. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning March 17, 2026.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Recommended Parts & Tools
head gasket replacement
Need Help With This Repair?
Chat with our AI mechanic to get step-by-step guidance specific to your vehicle's year, make, and model.
Start AI ChatAffiliate Disclosure: This page contains affiliate links. If you purchase products through these links, we may earn a small commission at no additional cost to you. This helps us maintain this free resource. We only recommend products we believe will help you diagnose and repair your vehicle. Prices shown are estimates and may vary.