What kind of bolts do Hondas use?
Hondas use a range of metric automotive bolts rather than a single type, with sizes and grades varying by model and component. For most maintenance tasks, you’ll encounter common metric fasteners such as M6, M8, and M10, with high-tensile bolts used for critical engine and drivetrain parts. Always consult the specific Honda service manual or OEM hardware for exact specifications.
Overview of bolt standards in Honda vehicles
Below are the main bolt families you’re likely to encounter across Honda vehicles, organized by system. Each list describes typical categories and what to expect when servicing that area.
Engine bolts
Engine-related fasteners hold the powertrain together and endure high stress and heat. Typical categories include:
- Cylinder head bolts: high-tensile, metric bolts used for the head-to-block connection; sizes vary by engine design (often around M8–M10 range).
- Valve cover bolts: standard-length, typically M6 or M8; sometimes with longer studs near the corners.
- Timing cover bolts: standard steel bolts, usually M6 or M8; often used with gaskets or seals.
- Oil pan bolts: usually M6 or M8, stainless or plated steel depending on model.
- Connecting rod and main bearing cap bolts: high-strength, metric bolts; torque specs are engine-specific.
- Intake and exhaust manifold bolts: commonly M6 or M8; usually steel and may require anti-seize on exhaust side.
Note: Some Honda engines use torque-to-yield head bolts that are designed to be replaced rather than re-used. Always verify with the service manual for your exact engine.
Body and chassis bolts
Body and chassis fasteners secure exterior panels, interior components, and structural parts. Expect a mix of standard metric bolts across these areas:
- Door and hood hinges: medium-to-high-tensile metric bolts, sizes commonly around M6–M8 (model-dependent).
- Fender, bumper, and splash panel bolts: vary, typically M6–M8; some may use longer fasteners or captive nuts.
- Seat mounting bolts: often M8 or M10 high-tensile bolts, sometimes with captive nuts in rails.
- Engine mount and transmission mount bolts: high-tensile bolts, sizes commonly in the M8–M12 range depending on the mount.
- Trim and interior panel fasteners: range from small bolts (M4–M6) to specialized fasteners; OEM hardware is advised for fit and safety.
Using OEM-spec fasteners ensures proper strength, alignment, and corrosion resistance for body components.
Wheel and suspension fasteners
Wheel attachments and suspension components use fasteners designed to handle dynamic loads and road conditions. Typical examples include:
- Wheel fasteners: most Hondas use lug nuts with studs (not wheel bolts) on metric threads; common thread size is around M12x1.5, with a 60-degree conical seat in many models. Always use the torque spec from the manual or wheel manufacturer.
- Strut and knuckle bolts: high-tensile metric bolts, commonly in the M10–M12 range depending on the assembly.
- Control arm and link bolts: high-strength bolts, sizes often M8–M12 depending on the component and generation.
- Sway bar links and stabilizer bolts: typically M8–M12; ensure correct end fittings and torque.
- Steering rack and tie-rod fasteners: high-strength bolts, sizes vary by model; always torque to spec.
For suspension work, use the OEM torque specs and consider thread locker or anti-seize per the manufacturer’s guidance, particularly in exposed or heat-exposed areas.
Practical tips for working with Honda bolts
To ensure safety and reliability when replacing bolts on a Honda, keep these guidelines in mind. Always refer to the official service manual for the exact fastener type, size, and torque specifications for your model and engine.
- Use OEM or equivalent high-quality fasteners designed for automotive use; substandard bolts can fail under load.
- Respect torque sequences and torque-to-yield requirements where applicable; some head bolts must be replaced rather than reused.
- Clean bolt holes and threads and apply the recommended lubricants or anti-seize/anti-corrosion compounds as specified by the manual.
- Check for correct thread pitch and length; mismatched bolts can cause misalignment or leakage.
- After reassembly, re-torque critical bolts if specified by the service procedure or after a break-in period.
Accurate fastener replacement protects performance, safety, and longevity of the vehicle.
Summary
Hondas employ a variety of metric bolts across engines, bodies, and suspension systems, with high-tensile hardware used for critical components. Exact sizes, grades, and thread pitches depend on the model and year, so always consult the specific Honda service manual or OEM hardware when servicing any part of the vehicle. Using the correct fasteners and torque specifications helps maintain reliability and safety.
Do Hondas use SAE or metric?
That's because all Honda vehicles use metric lug nuts, not the imperial/SAE sizes found on many American and European cars. So metric sockets, torque wrenches and lug nuts are required for DIY wheel work on Hondas.
What type of bolts do Hondas use?
Yes, almost all Honda bolts are metric. For example, the most common metric thread sizes of Honda bolts are M12x1. 5mm and M14x1. 5mm.
What grade are Honda bolts?
A bolt's tensile strength is also referred to as its "grade," and is something you should be very concerned with when replacing hardware on your Honda. Most Honda hardware is comparable to metric grade 10.9 or higher. Steps To Knowing Your Bolts: When determining bolt sizes, look to the numbers.
What bolt pattern does Honda use?
The most common Honda bolt patterns are 5x114.3mm for most standard cars like the Civic, Accord, and HR-V, and 5x120mm for larger vehicles and performance models like the Type-R, Odyssey, Pilot, and Ridgeline. Always check your specific vehicle model, year, and trim level to confirm the correct bolt pattern before purchasing wheels.
Common Honda bolt patterns
- 5x114.3mm: This is the most common pattern found on many standard Honda passenger cars.
- Examples: Honda Civic (non-Type R), Accord, HR-V.
- 5x120mm: This pattern is typically used on larger SUVs, trucks, and certain performance models.
- Examples: Honda Pilot, Odyssey, Ridgeline, and Civic Type-R.
- Older models: Some older Honda models may use different patterns, such as a 4x100mm bolt pattern, especially from the 1990s.
Important considerations
- Verify your specific vehicle: Because the bolt pattern can vary by model and even trim, it's crucial to verify your vehicle's specific requirements before purchasing new wheels.
- Check other specifications: In addition to the bolt pattern, make sure the wheel's center bore, offset, and load rating are also compatible with your vehicle for a safe fit.
