NGK Spark Plug - 7252

NGK FR5-1 (7252) - Standard Spark Plug / Sparkplug - Extended Projection Always Check this produc...

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Ngk Fr5-1 7252 Spark Plug Copper Core Fr51 New Ngk-Fr5-1

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Product Information

Full details

The NGK 7252 (FR5-1) is a high-quality nickel-alloy spark plug designed for automotive enthusiasts and everyday drivers who require reliable ignition performance for their vehicle's engine. It offers consistent combustion and efficient interference suppression, though it is crucial to verify vehicle compatibility using your owner's manual or manufacturer parts catalog before installation to ensure the correct reach and heat range.

All features

Model Part Number	NGK-FR5-1
Brand	NGK

Extended Product Information

FAQs

Does this spark plug come pre-gapped?

While these plugs typically arrive with a 0.9mm gap, you should always verify the gap against your vehicle's specific requirements before installation.

What tools do I need for installation?

You will need a 16mm spark plug socket, a ratchet extension, and ideally a torque wrench.

Is this a copper or iridium plug?

The NGK 7252 (FR5-1) uses a nickel alloy middle electrode.

How often should I replace these plugs?

Replacement intervals vary by vehicle; consult your owner's manual for recommended service intervals, typically every 30,000 to 50,000 miles for standard nickel plugs.

Can I use these in a modified high-performance engine?

These are standard replacement plugs. If your engine has been modified (e.g., turbocharging or high-compression), you should consult with a tuner regarding the required heat range and electrode material.

Are these plugs resistant to electrical interference?

Yes, they include a 5 kOhm resistor to suppress electromagnetic interference.

Troubleshooting

Engine misfire after installation

Double-check that the spark plug wire or ignition coil is fully seated on the SAE connector and confirm the gap is set to the manufacturer's specification.

Difficulty threading the plug

Remove the plug immediately and check for thread damage in the cylinder head; always start threading by hand to ensure proper alignment.

Rough idle

Verify that you have installed the correct heat range for your specific engine, as an incorrect heat range can lead to carbon fouling or pre-ignition.

Pros and Cons

Pros

Proven reliability from a leading brand
Effective noise suppression for vehicle electronics
Durable nickel electrode resists wear
Easy to install with standard spanner tools

Cons

Not intended for high-performance forced induction builds
Requires manual gap verification
Compatibility is vehicle-specific

Setup, Compatibility & Care

Before installation, always cross-reference your vehicle's engine code and year with the NGK part compatibility database, as using the incorrect spark plug can lead to engine damage. When installing, use a 16mm spark plug socket and ensure the threads are clean and free of debris. It is recommended to hand-tighten the plug initially to avoid cross-threading. If your vehicle manual specifies a torque setting, use a torque wrench to reach the exact value to ensure the gasket seat is compressed correctly. Always check the electrode gap (factory set at 0.9mm) before installation to ensure it has not been altered during transit.