× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 86 F250 overheats with vacuum in radiator
Posted to Technical Discussion Forum on 2/4/2025 4 Replies

And here's probably why you see vacuum in the cooling system.

You're driving the truck on the highway. It gets warm because of the lack of airflow. It pushes some pressure through the restricted/semi plugged overflow system.

You see that your truck is runn... Login to read more.

4 Replies Received (View Replies)