why is my car filling up the reservoir tank?

Asked by Mar 23, 2015 at 04:10 PM about the 1997 Subaru Legacy 4 Dr Outback AWD Wagon

Question type: Maintenance & Repair

It used to over heat only in the mornings after having driven it for about ten minutes and I would take off the radiator cap and fill up the radiator and the reservoir tank would be filled up completely, after that it would be fine for the rest of the day until the nest morning.
It seems that it overfills the reservoir tank and looses coolant though there.

4 Answers

61,445

Bad thermostat,or water pump.

Ok thank you. I thought it could be that but read that it could be a blown head casket it that likely? It did over fill the reservoir once after having it driven for about more than an hour but I just did the same thing of removing the radiator gap and refilling it and it was fine the rest of the trip

7,085

The blown head gasket is still a possibility, cylinder pressure could be pushing coolant up into the reservoir

20

You need a new radiator cap, and hose going to the overflow. The valve is stuck, and won't reverse pressure, or there is a clog in the hose that dislodges one way but sticks going the other way. by removing the radiator cap, the pressure was able to equalize which is why it was fine for the rest of the trip. I recommend flushing the coolant system afterwards to clear any debris that might be in there.

Your Answer

Add photo

Related Questions

Legacy

Looking for a Used Legacy in your area?

CarGurus has 16,085 nationwide Legacy listings starting at $1,300.

ZIP:

Search Subaru Legacy Questions

Subaru Legacy Experts

#1 Anthony_60
Anthony_60
Reputation 1,190
#2 Nick Eidemiller
Nick Eidemiller
Reputation 680
#3 dandyoun
dandyoun
Reputation 600
View All

Related Models For Sale

Used Subaru Impreza
176 Great Deals out of 13,341 listings starting at $1,817
Used Subaru Forester
254 Great Deals out of 22,783 listings starting at $1,499
Used Honda Accord
812 Great Deals out of 81,611 listings starting at $899
Used Toyota Camry
1,096 Great Deals out of 96,274 listings starting at $1,250
Used Honda Civic
668 Great Deals out of 77,418 listings starting at $1,000
Used BMW 3 Series
1,384 Great Deals out of 37,799 listings starting at $1,500
Used Audi A4
261 Great Deals out of 11,462 listings starting at $800
Used Nissan Altima
1,079 Great Deals out of 82,567 listings starting at $670
Used Honda CR-V
810 Great Deals out of 59,368 listings starting at $1,200

Used Cars For Sale

2017 Subaru Legacy For Sale
10,614 listings starting at $20,552
2016 Subaru Legacy For Sale
43 Great Deals out of 904 listings starting at $16,900
2015 Subaru Legacy For Sale
23 Great Deals out of 721 listings starting at $10,950
2014 Subaru Legacy For Sale
55 Great Deals out of 1,085 listings starting at $7,400