Coolant leaks after mechanic work was done?

Tiny
CORESONIC2
  • MEMBER
  • 2017 CHEVROLET SONIC
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
At the end of July I had my car listed above in to have the timing belt (tensioner and related parts), water pump, and serpentine belt replaced. A few weeks ago I noticed a coolant leak that I didn't have before. It seems to be coming out of a connector on top of the thermostat housing.
Thursday, October 2nd, 2025 AT 1:27 PM

2 Replies

Tiny
CORESONIC2
  • MEMBER
  • 2 POSTS
Pic for reference
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Thursday, October 2nd, 2025 AT 1:28 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Sorry for the repeat, the site had an issue but it is fixed now, this problem is because the part is made out of plastic not the mechanics fault, just bad timing. The coolant sensor will need to be removed and installed into the new thermostat housing. Let us know how it goes.
Was this
answer
helpful?
Yes
No
Tuesday, October 7th, 2025 AT 11:14 AM

Please login or register to post a reply.

Related Leak Content

Cooling System Pressure Test For Leaks
VIDEO
Cooling System Pressure Test For Leaks
Instructional repair video
Coolant Leak Symptoms
GUIDE
Coolant Leak Symptoms
Engine coolant is essential for regulating your vehicle’s temperature. A coolant leak can lead to serious engine damage if not addressed quickly. Below, we outline the...