My toyota van was overheating. Replaced thermostat and worked fine for about 2 weeks then stated over heating again, any ideas??

Asked by Jul 11, 2019 at 10:26 AM about the 2005 Toyota Sienna

Question type: Maintenance & Repair

4 Answers

10,245

waterpump could be worn, seen it where there are no fins left~ having overheated, if flow is bad, could operate in "limp mode" that is to say short trips, had this problem with my 73 celica going to LA, the motor had been previously cooked and was unaware of the calcification of just water instead of coolant can produce~ stops for "water" along the grapevine kept that thing alive, but once having been cooked, cannot un-cook the damage done to gaskets, etc~ sea foam is a product for "washing" the engine, but FLOW is necessary to keep 'er kleen~ so ya, the waterpump is my first guess~

14,095

don't make assumptions , each problem has to be diagnosed ,first do the fans come on when it gets hot ? if it over heats right away it may be the head gasket , is the exhaust white ? Is there goop under the oil fill cap ? If the coolant is full and it over heats occasionally or the temp. gauge varies it may be the thermostat . I recently replaced one that was only 5 months old , you can put it in a pan of water and bring it to a boil to see , but then you might as well replace it if you take it out but you'll know what the problem is . If you've checked all that it may be the radiator or the water pump , things should be tested before you replace them .

1 people found this helpful.

Thanks for the input. Yes the cooling fans come on when it heats up, it takes a while before it over heats and goes up slowly, the exhaust looks good, I have not checked the oil fill cap but will do. It over heats all the time know.

The oil fill cap looks good, there is some black residue on the engine under the cap, but not a lot. The coolant was low so added some but still started to overheat. Water pump bad maybe?

Your Answer:

Sienna

Looking for a Used Sienna in your area?

CarGurus has 928 nationwide Sienna listings starting at $4,765.

Postal Code:

Toyota Sienna Experts

  • #1
    Mik00000
    Reputation
    1,790
  • #2
    dandyoun
    Reputation
    1,250
  • #3
    TLX_4765
    Reputation
    1,110
View All

Find great deals from top-rated dealersTM

Search

Related Models For Sale

Used Honda Odyssey
31 Great Deals out of 1,380 listings starting at $2,450
Used Toyota Highlander
28 Great Deals out of 1,619 listings starting at $5,499
Used Toyota Camry
51 Great Deals out of 1,478 listings starting at $3,495
Used Honda Pilot
30 Great Deals out of 1,180 listings starting at $2,500
Used Dodge Grand Caravan
135 Great Deals out of 7,803 listings starting at $1,995
Used Toyota RAV4
87 Great Deals out of 4,651 listings starting at $2,977
Used Toyota 4Runner
21 Great Deals out of 759 listings starting at $5,995
Used Kia Sedona
9 Great Deals out of 749 listings starting at $4,900
Used Chrysler Pacifica
14 Great Deals out of 1,089 listings starting at $7,422
Used Toyota Sequoia
163 listings starting at $4,999
Used Toyota Corolla
123 Great Deals out of 6,574 listings starting at $2,575
Used Honda CR-V
113 Great Deals out of 6,817 listings starting at $3,600
Used Toyota Tacoma
33 Great Deals out of 1,414 listings starting at $7,900
Used Chevrolet Tahoe
20 Great Deals out of 1,082 listings starting at $4,900
Used Acura MDX
27 Great Deals out of 891 listings starting at $4,900

Used Cars for Sale

2020 Toyota Sienna For Sale
176 listings starting at $37,430
2019 Toyota Sienna For Sale
126 listings starting at $32,500
2018 Toyota Sienna For Sale
4 Great Deals out of 133 listings starting at $26,488
2017 Toyota Sienna For Sale
4 Great Deals out of 87 listings starting at $22,900
2016 Toyota Sienna For Sale
23 listings starting at $22,400

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.