The 5.7's factory water pump commonly starts leaking from its weep hole between 60 and 100 thousand kilometres — and it sits deep in the front of the engine, which is why quotes shock people. We replace it with an OEM pump at your home.
Inside every water pump is a spinning shaft sealed against pressurized coolant by a mechanical seal — and on the 3UR-FE 5.7 in the LX570 and Land Cruiser 200, that seal is the known weak point. The factory pump commonly starts to give up between 60,000 and 100,000 kilometres: the seal wears, coolant begins escaping past it, and the pump's weep hole — a built-in tattletale designed for exactly this — starts dripping. The first evidence is usually a dried green or pink crust below the pump snout and a stain tracking down the front of the block.
A weeping pump is a pump announcing its retirement. The same worn seal lets coolant reach the shaft bearing, and once the bearing starts to go, the failure accelerates: the weep becomes a drip, the drip becomes a stream, and a bearing that lets go entirely can wobble the pulley and take the drive belt with it. On a three-tonne truck, losing coolant circulation shows up first as temperatures creeping on hills and hot days — and a 5.7 doesn't tolerate being run hot.
The pump sits deep at the front of the engine behind the fan, shroud and drive belt, which is why the labour — not the part — dominates every quote for this job. It's also why, if the cam towers or timing cover are due for resealing on your truck, asking about bundling is smart: the front-of-engine teardown overlaps.
If your Lexus / Toyota is doing any of these, this is the likely cause:
Water pump failures are progressive and one-directional: the weep hole dripping today is the seal's formal notice. From there the bearing degrades, the leak rate climbs, and the end state is a pump that dumps coolant or seizes the belt — typically on the hottest day of the year, under load. An overheated 5.7 risks head gaskets and warped components that turn a half-day pump job into an engine-level repair. Replacing a weeping pump on your schedule beats replacing a failed one on the road's schedule, every time.
Yes — it's front-of-engine work, done from above after the fan and shroud come off. The job needs patience and a proper fill-and-bleed at the end, not a shop bay. Half a day at your home and the truck is back in service the same day.
Because of where it lives: deep at the front of the engine behind the fan assembly, shroud and belt, so the labour hours dwarf the part. Dealers bill those hours at dealership rates on a flagship vehicle. We quote one flat price for the complete job — pump, thermostat, coolant, pressure test — before any work starts.
For a short while, with vigilance — but understand what the weep is: coolant escaping past a worn shaft seal that also protects the pump bearing. It never improves, and the failure curve steepens near the end. On a truck this heavy, where overheating risks the engine itself, we'd book it sooner rather than later and skip the roadside version of this repair.
The thermostat — always, since the system is open and the part is cheap. The drive belt if it's coolant-soaked or aged. And if your 5.7 has the era's known cam tower or timing cover seepage, this teardown overlaps that one substantially, so bundling is worth a conversation before we book the visit.
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