• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

how long does it take to open thermostat?

  • Thread starter Thread starter woob
  • Start date Start date Jul 12, 2009

woob

Member
Mar 23, 2006
34
0
6
Tahlequah, OK
Jul 12, 2009
#1
  • Jul 12, 2009
  • #1
I'm almost done with my t5 and black interior swap. I had to drain the rad fluid so I could get to the trans cooler lines.

I popped the cap off, and filled the rad and overflow up, started car up and let it run for 5-7 minutes at idle, The temp gauge was almost up to the first notch, but didn't seem to be going anywhere. There seems to be a small amount running through upper radiator hose, and it was getting a little hot -- also noticed some small bubbles while looking in the rad, so there must be some opening of t-stat -- I shut the car down because I was unsure if my gauge was working right, and I didn't want to damage the engine.

What period of time should I run the car to allow the thermostat to open fully so that I can get some coolant running?
 
You must log in or register to reply here.

Similar threads

M
Engine 1988 Foxbody - Overheating Summer
  • MDrisc
  • Oct 26, 2025
  • Fox 5.0 Mustang Tech
Replies
10
Views
531
Fox 5.0 Mustang Tech Nov 28, 2025
Mustang5L5
B
Electrical Why does my fox body keep frying eecs
  • brandyn200
  • Jun 20, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
224
Fox 5.0 Mustang Tech Jun 25, 2026
AeroCoupe
Resolved Got Too Hot!!!
  • PonyGTrider
  • Apr 27, 2025
  • Fox 5.0 Mustang Tech
Replies
7
Views
583
Fox 5.0 Mustang Tech May 6, 2025
PonyGTrider
Drivetrain 83’ Glx convertible C5 Trans help!
  • JacksonJared2113
  • Dec 25, 2025
  • Fox 5.0 Mustang Tech
Replies
2
Views
379
Fox 5.0 Mustang Tech Dec 26, 2025
JacksonJared2113
S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
809
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?