1996 Pontiac Grand Prix Airlock?

1996 PONTIAC GRAND PRIX
177,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
OPTIMUS110608
  • MEMBER
  • 1 POST
Replaced thermostat, as it was stuck open and car wouldnt warm up. Now it wants to overheat, and then cool back off repeatedly, is this airlock? or am I missing something? What is the correct way to fill the cooling system on this engine, its the 3.1l
Jan 23, 2009 at 4:39 PM
Avatar
MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
You have some air in system more than likely.

Remove radiator cap, pour coolant (50/50) into radiator until full. There should be an air bleed valve near thermostat, open and bleed until coolant comes out. Fill coolant in radiator. when engine gets warm coolant will start to move through radiator.

If engine overheats, then thermostat is not opening, and is installed wrong, or incorrect part.
Jan 29, 2009 at 3:07 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