Why does my 2007 impreza 2.5i overheat when driving up mountains?

Asked by Jan 30, 2012 at 09:33 PM about the 2007 Subaru Impreza 2.5i Hatchback

Question type: Maintenance & Repair

A year ago (roughly 10k miles ago),
My car always overheats when climbing up hills at freeway speeds (65-70mph). Usually with 2 other passengers and lightweight amount of cargo.
The dealership performed tests on the entire cooling system and found no external leaks but found combustion in coolant and blown head gaskets. They ended up replacing head gaskets, thermostat, engine seal, and reassembled heads.

Yesterday is the first time I drive up the same mountainous region going to tahoe since the repair (about a year ago) and behold my engine temp begins overheating. I had 2 passengers this time as well and it happened immediately after the incline began. I turn around and drive back home not wanting to risk damaging anymore internal parts, with everything back to normal now.

I do not have any other problems or symptoms with engine overheating except when I drive up the mountain and the engine thermostat seems to rise 3/4 the way up and no further at which I immediately pull over and cool engine down. Coolant starts pouring out of reservoir.

Can anyone tell me why it is doing this? I have a little over 81,000 miles on the car.

6 Answers

45

I would definately go get the motor checked again, as last time you had the dealer do a checkup , your head gaskets were blown, which is never a good sign.

1 out of 1 people think this is helpful.
325

dude your timing belt is goin on your tensioner, gotta get that replaced, if the tensioner isnt tight your thermostat will stay closed and will over heat the car, it sounds really stupid but it happened to me

Headgasket was replaced- went out as a result of the overheating TIming belt was replaced when my headgasket was replaced. T-stat works fine. I drive my car under load under all conditions and the car only overheats as soon as I hit 2000+ elevation. It might be an air bubble, which I bled the cooling system again. Hopefully it won't happen again.

1,835

I'd put in a new thermostat, or take it out before climbing the hills, and see if it gets hot.

325

quick question, have you ever replaced your head gasket? be cause a blown gasket can over heat your car on up hill climbs... and their a known problem on subarus

1 out of 1 people think this is helpful.
325

http://www.rs25.com/forums/f190/t100250-head-gasket-problems- explained.html

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • PO420 Catalyst Below Threshold 3 answers

    PO420 Catalyst Below Threshold Code only This code appeared and I did a few things like cleaning the manifold and engine, then shut off the code to see how long til it re appears(did this a few tim...

    2007 Subaru Impreza

    -

    Maintenance & Repair

  • How can I get some more hp out of my impreza 4 answers

    I have a 2011 Subaru Impreza non-turboed. I want to get some more horsepower out of it when I drive up to the mountains. There is no cold air intake that fits my car without having to make my own p...

    2011 Subaru Impreza 2.5i Premium Hatchback

    -

    Car Customization

  • What motors will go into a 2005 Impreza? 19 answers

    I need to replace the motor in my 2005 Subaru Impreza RS. I was told I can use a motor from 2001 to 2007 Impreza, Forester or Outback. This doesn't sound right to me, but I want to make sure. It ...

    2005 Subaru Impreza 2.5 RS

    -

    Shopping & Pricing

  • Is putting a wrx cold air intake onto a 08 Impreza 2.5i with a wrx aftermarket exhaust worth it 5 answers

    2008 Subaru Impreza 2.5i

    -

    Car Customization

  • Do 2015 CVT Subaru Imprezas have an oil consumption issue? 39 answers

    I am considering buying a 2015 Subaru Impreza and wondering if it might suffer from excessive oil consumption. I have asked Subaru about this and they say that oil consumption has been an issue with s...

    2015 Subaru Impreza 2.0i Limited

    -

    General

Impreza

Looking for a Used Impreza in your area?

CarGurus has 8,109 nationwide Impreza listings starting at $1,795.

ZIP:

Search Subaru Impreza Questions

Subaru Impreza Experts

#1 FordNut
FordNut
Reputation 480
#2 TheSubaruGuruBoston
TheSubaruGuruBoston
Reputation 440
#2 Nick Eidemiller
Nick Eidemiller
Reputation 440
View All

Related Models For Sale

Used Subaru Impreza WRX
54 Great Deals out of 1,275 listings starting at $1,999
Used Subaru Impreza WRX STi
37 Great Deals out of 648 listings starting at $8,500
Used Subaru Outback
406 Great Deals out of 30,666 listings starting at $1,200
Used Subaru Legacy
247 Great Deals out of 16,993 listings starting at $1,300
Used Subaru Forester
403 Great Deals out of 21,389 listings starting at $1,290
Used Honda Civic
1,172 Great Deals out of 67,654 listings starting at $1,500
Used Mazda MAZDA3
467 Great Deals out of 27,909 listings starting at $1,250
Used Mitsubishi Lancer Evolution
14 Great Deals out of 695 listings starting at $11,990
Used Honda Accord
1,262 Great Deals out of 78,832 listings starting at $969
Used Toyota Corolla
1,414 Great Deals out of 69,992 listings starting at $988
Used BMW 3 Series
1,824 Great Deals out of 41,344 listings starting at $1,250

Used Cars For Sale

2017 Subaru Impreza For Sale
2,455 listings starting at $18,615
2016 Subaru Impreza For Sale
11 Great Deals out of 1,361 listings starting at $15,995
2015 Subaru Impreza For Sale
30 Great Deals out of 522 listings starting at $12,999
2014 Subaru Impreza For Sale
28 Great Deals out of 712 listings starting at $11,000
2013 Subaru Impreza For Sale
48 Great Deals out of 897 listings starting at $8,360