On the supercharged Range Rover Sport V8, the Eaton blower's nose bearing wears out long before the supercharger itself. Dealers quote a complete new supercharger; the real fix is rebuilding the snout — and we do that in your driveway.
The Eaton TVS supercharger on these V8s is driven by the serpentine belt through a nose section — the snout — that contains a coupler and the bearing the input shaft spins on. The rotors inside the blower are nearly indestructible, but the snout bearing runs at crank-pulley speeds for hundreds of thousands of kilometres and eventually wears. As it does, the whine sharpens and gets louder, the internal coupler develops play, and the rotors stop being driven at full speed under load — which you feel as soft, slipping boost.
Left to deteriorate, the bearing starts shedding metal. Those shavings get flung through the intake tract and collect in the intercooler — finding metallic glitter in the charge cooler is the classic confirmation that the snout is dying. That's also the line you don't want to cross: a worn bearing is a contained problem, but circulating metal in the intake system threatens the engine itself.
Here's the part dealers don't lead with: the snout is a serviceable assembly. The dealer fix is a complete new supercharger — hence quotes of $6,000–$9,000 — but the actual failed components are the snout bearing and coupler — serviceable parts, not a reason to scrap a healthy blower. Same blower, same rotors, new nose: full boost and a quiet drive restored.
If your Land Rover is doing any of these, this is the likely cause:
A whining snout bearing is cheap; a disintegrated one is not. Once the bearing starts shedding, metal travels through your intercooler toward the cylinders, and the failure stops being a supercharger problem and starts being an engine risk. The coupler wear also accelerates — slipping boost loads the remaining bearing surfaces harder, so the louder it gets, the faster it gets worse. Caught at the 'louder whine' stage, this is a one-day rebuild. Caught at the 'metal in the intake' stage, it's a teardown and cleanout on top.
The snout section can, yes. It's removed from the front of the blower with the engine in the truck, rebuilt on the bench with a new bearing and coupler, and reinstalled — all on site. The rotors and housing never need to come apart, because they're not what fails.
Dealers replace the supercharger as a complete assembly — that's a $6,000–$9,000 invoice driven by one part number. But the failure on these Eaton TVS units is almost always the snout bearing and coupler, which are rebuildable components. We diagnose what's actually worn, then quote one flat price for the complete fix before any work starts.
All of these blowers whine — the tell is change. A snout on its way out gets progressively louder over weeks, changes pitch, and often adds a rattle at idle or on shutdown. If your passenger can hear it with the windows up and they couldn't last year, it's worth a listen. We can usually confirm it in minutes with a stethoscope on the snout.
Yes. The lost boost comes from the worn coupler slipping between the pulley and the rotors — with a new coupler and bearing, the rotors are driven at full speed again and boost returns to factory levels. We verify it with a logged road test before we leave.
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