Coolant diappearing and reappearing lower than usual.

Asked by Jan 17, 2017 at 03:24 PM about the 2003 Chevrolet S-10 3 Dr STD Extended Cab SB

Question type: Maintenance & Repair

I fill up my coolant and notice it goes away in two days. It will then come
back but its not as full. IS there a leak somewhere? If not, how do I know
when to fill the coolant since it comes back.

I've had to refill my coolant 3 times this month. I do not drive far distances.
Only 15 min to work everyday.

2 Answers


You check the level with cold engine. When the engine is hot is normal to be under the level, but you will still see it. Do not open the coolant tank after the engine was on, thus hot, the coolant may spill over your hand and burn you. After the engine is hot, wait to cool and check the antifreeze level. Complete if necessary. That's it. If you have to add more in time, than it's a leak. Does your car exhaust smoke look whitish or smell sweet? If so, it's a problem with the headgasket. If not, try to find a leak if you refill with a lot of antifreeze (more tha 300ml - half a litter/1.5 months). Antifreeze leaks are not that hard to find, check the hoses on the radiator, or on the heater, or the engine and look for white/look-like-mineral deposits.

2 of 2 people found this helpful.

Check the coolant level the following morning after the engine has all cooled down. Coolant expands when it get hot so there is more coolant in the reservoir when the engine is at operating temperature. When the coolant level is low, then the engine has cooled down and it sucked in the coolant from the reservoir. Check and add as necessary when cold.

1 of 1 people found this helpful.

Your Answer

Chevrolet S-10 Experts

  • #1
    Andrew Olsen
  • #2
    John Saffrahn
  • #3
View All

Related Models For Sale

Used Chevrolet Colorado
31 Great Deals out of 2,781 listings starting at $3,980
Used Chevrolet Silverado 1500
157 Great Deals out of 12,242 listings starting at $1,895
Used Ford Ranger
48 Great Deals out of 333 listings starting at $3,495
Used GMC Sonoma
6 listings starting at $6,950
Used Toyota Tacoma
32 Great Deals out of 1,351 listings starting at $6,900
Used Ford F-150
514 Great Deals out of 9,927 listings starting at $3,490
Used Dodge Dakota
4 Great Deals out of 116 listings starting at $1,995
Used Chevrolet Blazer
17 listings starting at $3,295
Used Nissan Frontier
23 Great Deals out of 671 listings starting at $5,950
Used GMC Sierra 1500
173 Great Deals out of 12,024 listings starting at $1,775
Used GMC Canyon
27 Great Deals out of 2,241 listings starting at $3,494
Used Dodge Ram 1500
49 Great Deals out of 482 listings starting at $2,495
Used Chevrolet Camaro
1,067 listings starting at $12,995

Used Cars For Sale

2003 Chevrolet S-10 For Sale
3 listings starting at $7,995

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.