That is a good tip to remove the Thermostat without removing the intake manifold.
I replaced the oil filter housing at the same time as the Thermostat because the anti drain valve broke so the manifold had to come out anyway.
Here is the list of items that I’ve compiled for high mileage maintenance.
Based on your comments you are being proactive with the maintenance
Let me know what other items you’ve done that I should add to the list
Thanks
AWD marked with AWD – FWD 3.2’s can ignore AWD items
High Mileage Maintenance items for 3.2
1. Serpentine belt, tensioner, idler – replaced mine at 113,000 miles/10 years
2. Brake fluid flushed (every 3 years) Volvo recommendation?
3. Coolant replaced (failure is oil or ATF heat exchanger internal leaks)
4. AWD Rear differential oil change (every 50,000 miles) – I added a magnetic drain plug (LR2 and S80 V8 seem to be more susceptible to pinion bearing failure due to lack of maintenance)
5. ATF fluid flushed – search for Gibbons method (note: I used the modified Gibbons method)
6. Power steering fluid and reservoir replaced due to noisy heavy steering
7. Spark Plugs – replaced mine twice (every 50,000 miles, Volvo recommends 75,000 miles)
8. AWD BOT Gear oil for power Transfer unit (for mine I drilled a drain hole)
9. Battery – every 4 to 8 years (Low voltage while starting causes electrical gremlins on LR2)
10. O-Rings for Vacuum pump (~10 years or sooner if the leak is large)
11. AWD Haldex fluid and filter – I used genuine Volvo parts for this (it was cheaper than Land Rover)
12. AWD Replace CV joint grease in drive shaft joint near catalytic converter
Typical repairs for high mileage 3.2
A) Thermostat – replaced mine at 10 years (also replaced two coolant hoses)
B) Fuel pressure sending unit
C) PCV valve – replaced mine at 113,000 miles
D) Engine mounts
E) AC Compressor clutch pack
F) Ignition coils (Some evidence that a failed Thermostat leads to overheating and premature Coil failure)
G) Radiator Fan
H) Wheel Bearings
I) Anti-Drain back valve in oil canister housing failure
Less common repairs
I. Starter motor – typically fails at 100,000 miles or 10 years (not common on XC70)
II. Blower Resistor (not common on XC70)
III. Front Brake calipers refurbished (only if your aggressive with the brakes)
IV. Loose bolt on alternator pulley
V. Overdrive clutch pulley Alternator
VI. Overdrive clutch pulley READ drive
2010 S80 3.2 items completed
Maintenance 3,5,7,10
Typical repairs A, I D (Parts ordered)
Less Common Repairs – none so far
Take care
Paul