Answer
Jan 23, 2026 - 03:42 PM
That is a tricky question to answer without knowing which engine you have, because the 2007 XC90 came with three very different powerplants, and the cooling system layout is completely different for each one.
Here is a breakdown of where to look based on your specific engine:
1. The 3.2L Inline-6 (Most Common)
If you have the 3.2L, stop looking at the front of the engine (passenger side). Volvo designed this engine with the accessory drive on the rear (driver/transmission side). The water pump is gear-driven and mounted above the transmission. If you see coolant dripping down the back of the engine block or near the transmission bellhousing, that is likely your connection point failure.
2. The 4.4L V8
On the Yamaha-built V8, the water pump is centrally located, but it is buried tight. A common leak point here isn't actually the engine block connection itself, but the thermostat housing and the plastic nipples on the expansion tank, which get brittle with age and crack.
3. The 2.5T (5-Cylinder Turbo)
This is the traditional layout. The water pump is driven by the timing belt on the front (passenger side). However, don't forget to check the turbocharger coolant lines. The banjo bolts connecting the coolant lines to the turbo are notorious for leaking and dripping down onto the block, looking like a gasket failure.
The Solution
Since the hose routing and pump locations vary so wildly between these models, this repair manual is essential. It provides the specific cooling system diagrams for all three engine variants (B6324S, B8444S, and B5254T2), allowing you to trace every hose, pipe, and seal to find the source of the drip.
Better safe than sorry. 👍
