car overheats after long drive temp guage goes up and down hot no ac opened overflow bottle car running bubbles were coming up

Asked by Apr 12, 2017 at 08:20 PM about the 2000 Subaru Legacy GT Wagon

Question type: General

2 Answers

73,025

May need a new thermostat. Make sure the fans are working also. If some work had bed done that you had to drain the coolant down, then it may be that the cooling system needs to be purged from air pockets.

1 of 1 people found this helpful.
5,270

Subaru t-stats are extremely durable. Due diligence indicates checking for radiator and heater hose blockages, but historically the highest probability is that you've an inner head gasket breach, resulting in the infamous "percolation" of combustion gases superheating the coolant; pockets of this gas slip past the thermosensor, causing the bouncing needle. Quick determination can be made by "sniffing" the bubbles for HC content. If positive chase a "new" used motor, as blocks are usually too-stressed by the superheated coolant to last long after a HG replacement job. Sorry.

Your Answer

Add photo

Related Questions

Search Subaru Legacy Questions

Subaru Legacy Experts

#1 Anthony_60
Anthony_60
Reputation 1,270
#2 Nick Eidemiller
Nick Eidemiller
Reputation 720
#3 dandyoun
dandyoun
Reputation 700
View All

Related Models For Sale

Used Subaru Impreza
46 Great Deals out of 885 listings starting at $2,490
Used Subaru Outback
49 Great Deals out of 513 listings starting at $2,798
Used Subaru Forester
63 Great Deals out of 887 listings starting at $2,495
Used Honda Accord
66 Great Deals out of 1,131 listings starting at $748
Used Toyota Camry
43 Great Deals out of 1,604 listings starting at $1,700
Used Honda Civic
296 Great Deals out of 4,184 listings starting at $1,291
Used Audi A4
50 Great Deals out of 726 listings starting at $1,895
Used Nissan Altima
65 Great Deals out of 1,273 listings starting at $2,750
Used BMW 3 Series
146 Great Deals out of 1,906 listings starting at $2,300

Used Cars For Sale

2017 Subaru Legacy For Sale
131 listings starting at $22,995
2016 Subaru Legacy For Sale
29 listings starting at $22,495
2015 Subaru Legacy For Sale
4 Great Deals out of 53 listings starting at $14,992
2014 Subaru Legacy For Sale
3 Great Deals out of 48 listings starting at $11,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.