RC Car Maintenance After Every Run

What should you check first after every run?

• Wipe dust, mud or grass off the chassis and around the electronics before it dries and packs in.
• Spin each wheel by hand, feeling for grit, roughness or a notchy catch in the bearings.
• Look over the shock shafts for oil residue or a wet film, a sign of a weeping seal.
• Run a finger along visible screws, turnbuckles and body clips, feeling for anything that has backed out.
• Check the tires for chunks missing from the tread or separation from the wheel.

How do you know if your bearings need attention?

A gritty or notchy feel when you spin a wheel by hand almost always means dirt or water got past the seals. Rinsing the bearing out with a bearing-safe solvent and re-oiling it lightly can restore smooth spin for a rubber-sealed bearing meant to run fast; avoid packing it with thick grease, which adds drag instead of removing it. If a bearing still feels rough after cleaning, replace it rather than keep running it, since a bound or seized bearing loads the motor and drives up temperature. See the RC motor temperature guide for how that shows up. A kit like 15pcs Rubber Sealed RC Ball Bearings at $9.99 covers the common sizes to have on hand.

When should you change shock oil, and what weight?

Running through water, mud or deep dust can let oil emulsify or leak past a worn shock seal, and once that happens the shock stops damping consistently even if it still moves. Refreshing the oil restores predictable damping. A lighter weight oil (a lower WT/cst number) gives a softer, quicker-reacting shock; a heavier weight gives firmer, slower damping. A bottle like Team Losi Racing Silicone Shock Oil, 60WT at $9.99 is a common middle-to-firm weight for general use.

Why do RC car screws keep backing out, and what should you do about it?

Vibration from gear mesh and rough terrain slowly walks screws loose over time, especially body clips, shock caps and suspension pins. Keeping a spare kit on hand, like a 520pcs Universal RC Screw Kit at $9.99 covering common Traxxas, Redcat, ARRMA, Axial and RC4WD hardware, means a loose screw is a 30-second fix instead of a canceled run. A compact driver set such as the HobbyPark 6 in 1 RC Hex Driver Set at $24.97 covers the common hex sizes plus a nut driver and Phillips bit for the same job.

How should you store your LiPo battery between runs?

Do not leave a LiPo pack sitting at a full 4.2 volts per cell for more than a day or two; long-term storage at full charge shortens pack life. Storage voltage is roughly 3.8 volts per cell, and most smart chargers have a storage mode that charges or discharges to that level automatically. Always charge in a fireproof LiPo bag, like Zeee Fireproof Explosionproof Lipo Bag at $13.49, on a non-flammable surface, never unattended, and never charge a pack that has visibly puffed up.

What's a realistic post-run routine that doesn't take forever?

• Wipe the chassis down while it's still fresh, before dirt dries and packs in.
• Spin every wheel by hand and listen and feel for gritty bearings.
• Check shock shafts and visible screws while the car is already upside down or on a stand.
• Put the battery on its charger's storage mode instead of leaving it at whatever charge it ended the run on.
• Note anything that felt off, a slightly loose screw, a shock that felt stiffer than usual, so you can check it again before the next run.