DIY: 2005 Volvo XC90 Thermostat + ECT without removing PS Pump

Post by **abscate** » 09 Dec 2023, 03:05

This is such a great write up of a real time saving procedure.

Trying to find answer to the gasket question above, the v70 diagram shows the gasket 17 but no part number given .....

ford92925 · Post by **ford92925** » 10 Dec 2023, 08:15

Volvo does not sell Tstat alone (some forums say it may be Gates TH35991 which may require modification before install), instead you have to buy the whole tstat assembly which includes: lower housing, upper housing, tstat itself, and ECT sensor....

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Post by **xHeart** » 11 Dec 2023, 08:40

abscate wrote: 09 Dec 2023, 03:05 This is such a great write up of a real time saving procedure.

Trying to find answer to the gasket question above, the v70 diagram shows the gasket 17 but no part number given ..... :shock:

The thermostat assembly part #31293700 can be removed for servicing, reassembled with Permatex Water Pump & Thermostat Housing Gasket Maker. You are good to many years. Thinly coated screw threads are best before assembling.