Not starting

2004 MERCURY MOUNTAINEER
194,000 MILES • 2WD • AUTOMATIC
Avatar
CLEO22
  • MEMBER
  • 1 POST
Car started but was smoking. Replaced valve cover (had cracks), then started, no more smoking, but thermostat housing was leaking. So replaced that, now it will not start and coolant reservoir smells gassy and a slight hum.
Aug 18, 2018 at 2:27 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Hi and thanks for using 2carpros.com

Is the engine trying to start? Thermostat replacement shouldn't have caused a no start issue. Take a look through this link. It discusses reasons why an engine won't start and possible solutions.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Also, since you are getting a fuel smell in the coolant, you may want to check for a head gasket issue. Here is a link that describes how that is checked.

https://www.2carpros.com/articles/head-gasket-blown-test

After you go through these links, let me know if you still need help or have questions.

Take care,
Joe
Aug 20, 2018 at 11:47 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle