DIY: Infiniti G37 6MT Clutch Pedal Spring Replacement

DIY: Infiniti G37 6MT Clutch Pedal Spring Replacement

Stop stalling and lurching your manual transmission. Swapping the factory clutch assist spring takes 20 minutes and instantly fixes the unpredictable engagement point.

The Short Answer (TL;DR)

Replacing the heavy factory clutch assist spring in the Infiniti G37 6MT takes about 20 to 30 minutes using basic hand tools and cable ties. Swapping to a lighter spring smooths out the engagement zone, eliminates pedal lurch, and improves low-speed drivability. Since you are working under the dash, upgrading the entire pedal assembly is also an option.

The DIY Process Overview

To perform this job, you need needle-nose pliers, channel locks, heavy-duty cable ties, a flathead screwdriver, and some white lithium grease. Start by compressing the factory spring assembly using heavy-duty cable ties to remove tension. Carefully pry off the bottom 'C' clip using a flat screwdriver, ensuring it does not shoot behind the firewall.

With the tension relieved, slide the bottom pin out. You do not need to remove the top pin entirely; simply swing the assembly down to free the lower section. Swap the heavy factory yellow spring for the lighter aftermarket unit. Compress the new assembly to roughly 62mm using fresh cable ties.

Reinstall the assembly, ensuring the 1/8-inch indentations face the right side, closest to the pedal arm. Lubricate the bottom pin before insertion. Because space is tight, use channel lock pliers to press the bottom pin through the housing rather than struggling with needle-nose pliers. Snap the 'C' clip back on, cut the cable ties, and check pedal operation.

Why You Should Upgrade While You're In There

If the lighter spring still does not provide the exact pedal feel you want, the factory fulcrum geometry is the true limiting factor. Upgrading the entire pedal structure permanently resolves the G37's notoriously vague engagement zone. Furthermore, matching improved clutch feel with proper engine tuning transforms the VQ37VHR's drivability.

Recommended Upgrade: RJM Performance Adjustable Clutch Pedal Assembly and an ECU Tune.

Frequently Asked Questions

Is it hard to align the bottom pin during reassembly?

Yes, lining up the bottom pin can be difficult due to tight clearances. Using channel locks allows you to apply direct, even pressure to force the pin through the housing once it is started. Do not forget to lubricate the pin beforehand.

Does the lighter spring make the clutch pedal harder to press?

A lighter assist spring slightly increases the effort required to depress the pedal, but it changes the feel from a non-linear lurch to a smooth, progressive sweep. This provides the mechanical feedback necessary to find the bite point consistently and eliminates knee fatigue in heavy traffic.

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