Parts for your 2018 Holden Captiva 7-Rack boots

2018 Holden Captiva 7 – Rack Boots

Based on technical documentation, the 2018 Holden Captiva 7 (CG Series II) is fitted with rack-and-pinion steering that uses bellows-style rack boots (also called steering rack gaiters). The Holden/GM Workshop Manual for the CG Series II (Steering – Rack and Pinion – Boot Replacement) outlines inspection and replacement of these boots, and the GM/ACDelco parts catalogue lists steering gear boots for Captiva CG. Those sources confirm rack boots are absolutely relevant to this model.

On the Captiva 7, the rack boots sit on either end of the steering rack, sealing the inner tie rod and rack bar from water, dust, and grit while keeping grease where it belongs. Without them, road splash and fine dust work their way into the rack, chewing out the inner tie rod sockets and rack seals, and ultimately sending the steering gear to an early retirement. So while they’re simple rubber bellows, they punch well above their weight in protecting the steering.

As part of regular servicing, it’s smart to give the rack boots a quick look every 10,000–15,000 km or at each service. What to check:

• Cracks, splits, or perishing in the bellows ribs
• Grease slung out near the inner tie rod, or dampness inside the boot
• Loose, missing, or makeshift clamps (cable ties aren’t ideal)

If a boot is torn, replace it promptly. Dirt inside the rack can turn a cheap boot job into a very pricey steering rack replacement. Replacement on a Captiva 7 is a straight-up job for a competent tech: support the vehicle safely, mark the tie rod end position, remove the outer tie rod end from the knuckle, slide the old boot off, clean the area, then fit the correct-spec boot with proper stainless or ear-type clamps. Avoid twisting the boot and make sure any breather path between sides isn’t blocked. It’s good practice to replace boots in pairs if they’re aged similarly.

After boot replacement, a wheel alignment is recommended, because the outer tie rod end is disturbed during the process. Torque settings should follow the Holden CG Series II specs from the workshop manual. For vehicles with electric power steering, keep the ignition off while the steering linkage is disconnected and avoid turning the wheel to protect the steering angle sensor and the EPS unit.

FAQs

What are the signs the rack boots need replacing on a 2018 Captiva 7?
Look for visible cracks or splits in the rubber, grease flicked around the inner guard, or dampness/contamination inside the boot. You might also notice vague steering or a knock over bumps if the inner tie rod has started to wear after dirt got in.

Do you need a wheel alignment after changing rack boots?
Yes. Because the outer tie rod end is removed or shifted to slip the boot on and off, an alignment is advised to keep the Captiva tracking straight and to avoid uneven tyre wear.

Can universal rack boots be used on a Captiva 7?
Universal boots can work in a pinch, but the best result comes from a boot designed for the Captiva CG rack. Proper fitment ensures correct sealing, clearance at full lock, and reliable clamping.