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

Asked by Matthew 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

Paul answered 12 years ago

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 people found this helpful.
Mark helpful
875

Larry answered 12 years ago

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

Mark helpful

Matthew answered 12 years ago

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.

Mark helpful
4,005

Anthony answered 12 years ago

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

1 people found this helpful.
Mark helpful
875

Larry answered 12 years ago

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

2 people found this helpful.
Mark helpful
875

Larry answered 12 years ago

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

4 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • Why does my 2007 impreza 2.5i overheat when driving up mountains? 6 Answers

    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 perfor...

    2007 Subaru Impreza 2.5i Hatchback

    -

    Maintenance & Repair

  • 2007 Subaru Impreza 2.5i 13 Answers

    How much would it be to put a normal 2.5L engine in a 2007 Subaru Impreza 2.5i. like and engine swap with the same motor because mine has a rod bearing out

    2007 Subaru Impreza 2.5 i

    -

    Maintenance & Repair

  • 2007 subaru impreza 2.5i MISFIRE 1 Answer

    I have a constant misfire in all my cylinders when i plug my code reader. i have changed distributor,spark plugs,spark plug wires. The basic stuff for misfire now some backstory about it I head peop...

    2007 Subaru Impreza 2.5 i

    -

    Maintenance & Repair

  • 2009 Impreza 2.5i When turning hard over the steering wheel shakes. Why? 1 Answer

    When making a u-turn or just turning with steering wheel locked or near locked right or left the steering wheel shakes. Why? What's the fix?

    Subaru Impreza

    -

    Maintenance & Repair

  • 2006 Impreza 2.5i 1 Answer

    Will JDM EJ20 n/a work with my 2.5i heads with the active valves? Reason why is I had a rod Thur the block

    2006 Subaru Impreza 2.5i

    -

    Maintenance & Repair

Impreza

Looking for a Used Impreza in your area?

CarGurus has 642 nationwide Impreza listings starting at $3,999.

Postal Code:

Shortcuts

Search Subaru Impreza Questions

CarGurus Experts

  • #1
    TheSubaruGuruBoston
    Reputation
    3,510
  • #2
    Nick Eidemiller
    Reputation
    910
  • #3
    Guybrarian
    Reputation
    830
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Subaru Impreza WRX
4 Great Deals out of 22 listings starting at $7,995
Used Subaru Legacy
13 Great Deals out of 216 listings starting at $3,200
Used Subaru Outback
34 Great Deals out of 1,120 listings starting at $2,995
Used Honda Civic
204 Great Deals out of 4,033 listings starting at $1,999
Used Subaru Forester
39 Great Deals out of 1,322 listings starting at $3,995
Used Mazda MAZDA3
67 Great Deals out of 1,325 listings starting at $2,900
Used Toyota Corolla
140 Great Deals out of 2,270 listings starting at $3,495
Used Toyota Camry
49 Great Deals out of 1,110 listings starting at $2,500
Used Subaru Impreza WRX STI
20 listings starting at $13,950
Used Honda CR-V
182 Great Deals out of 4,992 listings starting at $440
Used Honda Accord
50 Great Deals out of 965 listings starting at $2,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.