• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Thermostat


Forrest

Forrest

Active Member
Joined
Aug 13, 2008
Messages
29
City
Wisconsin
Vehicle Year
2000
Transmission
Automatic
Why does the 4.0l have to have a breather hole in the thermostat?
 
does anyone know

Most thermostats do not have breather holes.
 
I noticed the same thing when i did mine, its most likely to help purge the system after a flush and keep any air from staying in the manifold.
 
You must log in or register to reply here.

Sponsored Ad


Sponsored Ad

TRS Events

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Latest posts

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Ranger Adventure Video

TRS Merchandise

Follow TRS On Instagram

Latest Album Photos

IMG_0790.jpeg
20250606_193025.jpg
20250717_161404.jpg
2f30d2e5-a0b6-4419-bb34-5c120604fb82.jpg
IMG_0673.jpeg
IMG_0675.jpeg
IMG_0671.jpeg
85 ranger
85 Ford Ranger
PXL_20250409_152004355.jpg
IMG_9440.jpeg
IMG_4799.jpeg

TRS Sponsors


Sponsored Ad


Sponsored Ad


Amazon Deals

Sponsored Ad

Back
Top