Expansion Tank replacement on 98 C70 coupe
This topic is in the MVS Volvo Repair Database »
How to Replace Coolant Expansion Tank on Volvo 850/S70/V70/C70
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cn90
- Posts: 8251
- Joined: 31 March 2010
- Year and Model: 2004 V70 2.5T
- Location: Omaha NE
- Has thanked: 4 times
- Been thanked: 466 times
For those of you who have replaced the Coolant Reservoir, at what year/mileage did your Coolant Reservoir go to heaven?
Mine is now 14y/120K miles and although there is no leak yet, I'd like to do PM.
Mine is now 14y/120K miles and although there is no leak yet, I'd like to do PM.
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+
2005 XC90 2.5T 110K+
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cn90
- Posts: 8251
- Joined: 31 March 2010
- Year and Model: 2004 V70 2.5T
- Location: Omaha NE
- Has thanked: 4 times
- Been thanked: 466 times
Some minor little tips to add to this DIY. I have 1998 V70 which has exact same setup as this DIY.
1- For the last few years, I have noticed that I lost 1 cup of coolant per month. I attributed that to evaporation!
Now I know it was coming from the hairline cracks at the bottom of reservoir.
So I strongly recommend people replace their reservoir every 10y/100K miles. It is only $40 at Waltrip Volvo website. And it is genuine Volvo. When it comes to cooling system in any cars, do not gamble with unknown brands!
2- I got all my parts from Waltrip Volvo:
* Reservoir + Cap
* 2 hoses to reservoir
* Tstat and 2 bolts (it is another topic)
* Radiator petcock
3- I need to flush the antifreeze anyway, so I drained from radiator petcock (6-mm Allen key).
Put in new petcock.
Note the small O-ring at the very tip of the petcock, that is what seals the coolant!
4- Note: Hose near firewall ---> 7-mm hex to remove clamp.
5- I used Advance Autoparts Coolant (made by Prestone).
6- Note: the Coolant Level Sensor fits in the blind recess at the bottom of the reservoir.
The sensor does not touch the coolant. It senses the level via the magnetic floater inside the reservoir.
7- Once done, fill with 50-50 coolant mix.
- Go for a test drive around the blocks (don't go too far!) with spare 50-50 coolant in the trunk!
- If you drain from the radiator like I did.....you will need another 0.3 Gallon or so! Just wait until the car cools down to add coolant.
--------
See the pics:
1- For the last few years, I have noticed that I lost 1 cup of coolant per month. I attributed that to evaporation!
Now I know it was coming from the hairline cracks at the bottom of reservoir.
So I strongly recommend people replace their reservoir every 10y/100K miles. It is only $40 at Waltrip Volvo website. And it is genuine Volvo. When it comes to cooling system in any cars, do not gamble with unknown brands!
2- I got all my parts from Waltrip Volvo:
* Reservoir + Cap
* 2 hoses to reservoir
* Tstat and 2 bolts (it is another topic)
* Radiator petcock
3- I need to flush the antifreeze anyway, so I drained from radiator petcock (6-mm Allen key).
Put in new petcock.
Note the small O-ring at the very tip of the petcock, that is what seals the coolant!
4- Note: Hose near firewall ---> 7-mm hex to remove clamp.
5- I used Advance Autoparts Coolant (made by Prestone).
6- Note: the Coolant Level Sensor fits in the blind recess at the bottom of the reservoir.
The sensor does not touch the coolant. It senses the level via the magnetic floater inside the reservoir.
7- Once done, fill with 50-50 coolant mix.
- Go for a test drive around the blocks (don't go too far!) with spare 50-50 coolant in the trunk!
- If you drain from the radiator like I did.....you will need another 0.3 Gallon or so! Just wait until the car cools down to add coolant.
--------
See the pics:
- VolvoReservoir01.JPG (120.5 KiB) Viewed 2155 times
- VolvoReservoir02.JPG (83.48 KiB) Viewed 2155 times
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+
2005 XC90 2.5T 110K+
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