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How to Replace Coolant Temperature Sensor 99-02 Volvo V70

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  1. step : Draining the Coolant (0:41)
    • Have a drain pan ready
    • Twist off the coolant bottle cap
    • Loosen the drain bolt with a 13mm socket and extension
    • Let a half-gallon of coolant drain
    • Twist on the coolant bottle cap
    • Tighten the drain bolt
  2. step : Removing the Engine Cover (1:31)
    • Remove the two T30 Torx screws from the engine cover
    • Undo the engine cover clips
    • Pull off the engine cover
  3. step : Removing the Thermostat (1:54)
    • Remove the two T40 bolts from he thermostat housing
    • Pull the thermostat housing aside
    • Pull out the thermostat
  4. step : Removing the Engine Coolant Temperature Sensor (2:15)
    • Unclip the engine coolant temperature (ECT) sensor wire from its bracket
    • Disconnect the ECT sensor wiring harness
    • Remove the ECT sensor with a 3/4 inch wrench
    • Pull off the ECT sensor
  5. step : Installing the New ECT Sensor (2:38)
    • Thread the new ECT into place
    • Tighten the ECT sensor with a 3/4 inch wrench
    • Connect the ECT sensor wiring harness
    • Clip the ECT sensor wire onto its bracket
  6. step : Reinstalling the Thermostat (3:01)
    • Put the thermostat into place
    • Put the thermostat housing into place
    • Insert the two T40 bolts into the thermostat housing
  7. step : Reinstalling the Engine Cover (3:17)
    • Clip the engine cover into place
    • Insert the two T30 bolts into the engine cover
  8. step : Refilling the Coolant (3:21)
    • Twist off the coolant bottle cap
    • Add coolant to the bottle with a funnel
    • Twist on the coolant bottle cap

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace an ECT sensor or commonly known as an engine coolant temperature sensor on a 2002 Volvo V70 non-turbo. It's undamentally the same for 2001 to 2007 V70's and the non-turbo S60's of the same model years. For this repair, you'll need a Torx 30 and 40 socket, a socket wrench, 13mm socket, 3/4 inch open-ended wrench and a drain bucket to catch the coolant and a funnel to help put it back in.

Locate and remove the coolant reservoir bottle cap. Underneath the driver's front side of the radiator, you'll find a plastic hollow bolt which is the coolant drain. Go ahead and use a 13mm socket and socket extension to drain the coolant. After about a half a gallon has come out, go ahead and reinstall the coolant bottle cap to make the coolant stop coming out. Then go ahead, with your 13mm socket and extension, and hand tighten it, not too tight. It is plastic on plastic.

On the right side of the engine, furthest, most to the passenger side, on the top of the valve cover, you're going to find two Torx 30 screws. Go ahead and remove those and I'll fast forward as I do that. Then to get the cover up out of the way, you're going to have two little clips on either side of it, press them out and pull the cover off.

With that cover out of the way, you'll locate the two Torx 40 bolts that hold the thermostat housing on, remove those. With the thermostat housing now free, pull it out of the way and pull your thermostat up and out.

Remove the clip that holds the ECT sensor's wire in place. Disconnect the ECT sensor from the main harness and then from the clip. Use a 3/4 inch wrench to remove the ECT sensor. That is directly below the thermostat housing. Install your ECT sensor with the copper gasket and then tighten it up with your 3/4 inch wrench and I'll fast forward as I do that. Plug the ECT sensor back into the harness and then clip the harness onto its bracket.

Install the thermostat and then the thermostat housing and upper hose. Go ahead and reinstall the Torx 40 bolts. I'll go ahead and fast forward as I tighten those up.

Install the plastic cover and tighten up your two Torx 30 bolts.

Use a funnel with a screen to catch any debris that's going to go into your coolant reservoir. Go ahead and refill your coolant, and I will fast forward as I finish that up.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    General Tools

  • Drain Pan
  • Funnel

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 13mm Socket

  • Star Drivers & Sockets

  • T40 Bit
  • T30 Driver

  • Wrenches - SAE

  • 3/4 Inch Wrench

1999 - 2000  Volvo  S70
2000 - 2004  Volvo  V40
1999 - 2002  Volvo  V70
2000 - 2004  Volvo  S40
2001 - 2002  Volvo  S60
1998 - 2001  Volvo  C70

98-02 Volvo C70, S60, S70, S40, V40, V70 Multifit Coolant Temp Sensor

Volvo C70 S40 S60 S70 V40 V70 Coolant Temperature Sensor DIY Solutions HVA03533

This part replaces:

  • Standard Motor Products TX113
  • OE # 91254631
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