Parts for your 2018 Holden Colorado-Thrust bearing

2018 Holden Colorado thrust-bearing — what it is and when it matters

Technical documentation for the RG-series Holden Colorado shows that 2018 manual-transmission models use a concentric slave cylinder with an integrated clutch release (thrust) bearing, making a thrust-bearing directly relevant to those vehicles (Holden/GM RG Colorado Service Manual: Clutch Controls — Concentric Slave Cylinder, aftermarket catalogues from EXEDY and LUK list kits for 2012–2020 Colorado that include the CSC/release bearing). Automatic models don’t have a clutch release bearing, though the engine does have crankshaft thrust bearings within the main bearing set, those aren’t routine service items (GM Global Service Information — Engine Mechanical, Main Bearings/Thrust Faces).

On a 2018 Holden Colorado with a manual ’box, the thrust-bearing (release bearing) sits around the gearbox input shaft as part of the concentric slave cylinder. Its job is simple but critical: when the clutch pedal is pressed, hydraulic pressure pushes the bearing against the pressure plate’s diaphragm spring, cleanly disengaging the clutch so gears slip in without a graunch. Because it runs under load whenever the pedal’s down, that bearing needs to spin smoothly and quietly.

In the workshop, it’s treated as a replace-when-accessed item. Any time the gearbox is out for a clutch, it’s good practice to fit a new CSC/release bearing, along with a clutch kit and a skim of the flywheel if needed. It’s a sealed, pre-lubed assembly — no greasing — and if it’s weeping fluid at the bellhousing or feels gritty, it’s due. Typical warning signs include a chirp, squeal, or rumble that changes with pedal pressure, a notchy pedal, hard gear selection, or clutch fluid loss. Because the CSC shares the brake fluid reservoir on many setups, the correct spec brake fluid per the owner’s manual (commonly DOT 4) should be used, the level kept up, and the system bled with care to avoid aeration.

When the gearbox is out, savvy techs also check the pilot (spigot) bearing in the crank, the rear main seal, and clutch fork/pivot wear if fitted. Bolts that are torque-to-yield should be renewed and torqued to spec. A pressure or vacuum bleed makes light work of pedal feel after refit. For owners who tow or see dusty, hot conditions, a preventative clutch kit plus CSC at 150–200,000 km — or earlier if symptoms show — saves another gearbox drop later. Done right, the Colorado’s clutch action stays light, quiet, and drama-free for years.

• Key tips: replace CSC with every clutch, use the specified brake fluid, bleed carefully, and inspect related hardware while the box is out.

Popular questions about 2018 Holden Colorado thrust-bearing

Does a 2018 Holden Colorado have a thrust-bearing?
Yes — on manual models it’s the clutch release bearing integrated into the concentric slave cylinder. Automatics don’t have a clutch release bearing, though the engine’s crankshaft uses thrust bearings that are not serviced during routine maintenance.

What are the symptoms of a worn thrust-bearing on a Colorado?
Owners often notice a chirp, squeal, or rumble that changes as the clutch pedal is pressed, plus a rough pedal feel or hard gear engagement. Fluid drips from the bellhousing can point to a failing concentric slave cylinder/bearing assembly.

Should the thrust-bearing be replaced with the clutch?
Absolutely. Because the gearbox has to come out to access it, replacing the CSC/release bearing whenever a clutch is done is smart money. Most clutch kits for the Colorado include the CSC, and the job should also cover a pilot bearing check and flywheel inspection.