What's in the GMB Range
GMB is best known for engine cooling and driveline components, and the range Tinkr stocks reflects that. Parts that quietly keep your engine at the right temperature and your wheels turning smoothly, rather than flashy performance upgrades.
GMB Water Pumps
A GMB water pump circulates coolant through the engine block and radiator, and it's one of those parts that causes serious damage if it fails quietly rather than obviously. Overheating from a failed water pump can warp a cylinder head in minutes, so replacing on schedule, or at the first sign of coolant leaks or a whining bearing, is cheap insurance against a much bigger repair bill. Because the water pump is often driven off the timing belt on older engines, most workshops replace it as a matter of course during a timing belt kit job, even if it isn't showing symptoms yet. It's a lot cheaper to swap a water pump alongside a belt you've already got the engine open for than to go back in a year later for a separate job.
GMB Hub Bearing Units
GMB hub bearing units combine the wheel bearing and hub into one sealed assembly, which is how most modern vehicles are built rather than a separate bearing and hub. A failing hub unit usually announces itself with a rumbling or humming noise that changes with speed, and gets worse in corners as load shifts across the bearing. Front and rear hub units are almost never interchangeable, and many vehicles use a different design side to side depending on whether that wheel is driven, so it's worth confirming the exact position before ordering rather than assuming one part fits both ends.
GMB Fan Clutches
A GMB fan clutch controls how hard the engine cooling fan spins. It engages more when the engine's hot and freewheels when it isn't, which saves fuel and cuts down on noise. A stuck-on fan clutch roars constantly at idle. One that's failed off lets the engine run hot, especially at low speed or when towing.
GMB CV Joints & Driveshaft Parts
Rounding out the range, GMB CV joints and driveshaft components transfer power from the transmission to the wheels while allowing for suspension movement and steering angle. A clicking noise on tight turns is the classic sign a CV joint needs attention before the rubber boot splits and grease, then eventually the joint itself, fails completely. Front-wheel-drive and all-wheel-drive vehicles rely on these joints on every drive, so a worn one isn't a cosmetic issue. Left long enough, it can fail outright and leave a vehicle undriveable, which is a far more expensive tow-truck problem than the part itself would have cost.
Why GMB Car Parts Are Worth Choosing
GMB has been manufacturing for the automotive industry, including direct supply to vehicle manufacturers, since the 1960s, so parts sold under the GMB name aren't a budget aftermarket punt. For workshops and DIY buyers alike, GMB car parts sit in a genuinely useful middle ground: priced sensibly, built to the same spec as the equipment already on the car, without the premium some brands charge purely for badge recognition.
Why Buy GMB Parts from Tinkr
Whatever's failing under the bonnet, buying GMB parts from Tinkr means genuine stock matched to your exact vehicle, not a generic part number and a hope. We carry 150,000+ parts, ship NZ-wide in 1 to 3 business days (same-day dispatch before 2pm), and back it with 0800 support from a real NZ team. Afterpay is available if you're tackling a bigger job, like a water pump and timing kit together, and Club Tinkr members pick up ongoing perks on repeat orders.
GMB range at a glance
- Water pump: circulates coolant through the engine and radiator. Warning signs: coolant leaks, overheating, a whining bearing.
- Hub bearing unit: supports the wheel and allows smooth rotation. Warning signs: rumbling or humming noise, worse in corners.
- Fan clutch: controls engine cooling fan engagement. Warning signs: constant roaring at idle, or the engine running hot.
- CV joint / driveshaft: transfers power to the wheels through suspension travel. Warning sign: clicking noise on tight turns.
Frequently Asked Questions
What kind of parts does GMB make? GMB parts cover engine cooling and driveline components: water pumps, hub bearing units, fan clutches, and CV joints and driveshaft parts. Tinkr stocks the range across most makes and models NZ drivers are running.
Are GMB car parts as good as the original manufacturer's parts? Yes. GMB car parts are built to OE-equivalent tolerances, and GMB has supplied parts directly to vehicle manufacturers for decades. Tinkr stocks GMB as genuine stock matched to your exact vehicle, so choosing it over a dealer part isn't a quality compromise, just a cheaper one.
How do I know if my water pump is failing? Common signs include a puddle of coolant under the vehicle, an engine running hotter than usual, or a high-pitched whine from the front of the engine as the bearing wears. Left unchecked, a failed water pump can lead to overheating and much more expensive engine damage, so if any of that sounds familiar, Tinkr's GMB water pumps ship fast enough to get you sorted before it becomes a tow-truck problem.
What does a fan clutch actually do? A fan clutch engages the engine cooling fan when the engine needs more airflow, and disengages it when it doesn't, saving fuel and cutting down on noise. One that's stuck permanently on roars loudly at idle, while one that's failed off lets the engine run hotter than it should, and Tinkr stocks GMB fan clutches matched to your specific vehicle for either fault.
How do I know if a CV joint needs replacing? A clicking or popping noise when turning at low speed, especially in reverse, is the classic symptom of a worn CV joint. Left too long, the rubber boot can split, letting grease escape and dirt in, which speeds up the failure, and Tinkr stocks the GMB CV joints and driveshaft parts to fix it before that happens.
Do GMB parts fit my specific vehicle? Every GMB part listed on Tinkr is matched to specific vehicle years, makes and models, so what's shown against your rego is the correct fitment. If you're ever unsure, our 0800 team can confirm before you order.
