jeepmud13 Posted August 13, 2007 Share Posted August 13, 2007 my jeep is running cold. i did the t-stat and the waterpump and my jeep keeps running cold. i got all the air out of the system. the thing is after i run it i can here air coming outta the overflow bottle. will that mess with the closed system? its an 88' 4.0 thanks Link to comment Share on other sites More sharing options...
Eagle Posted August 13, 2007 Share Posted August 13, 2007 If it's an '88 and you haven't converted the cooling system, you don't have an "overflow" bottle. That plastic bottle on the firewall is part of the pressurized system. It's an expansion tank -- it should be half-full when cold, and just about full when hot and under pressure. If it's leaking air, your system won't hold pressure. You can get a replacement bottle (with cap) from Quadratec for about $20. Link to comment Share on other sites More sharing options...
jeepmud13 Posted August 13, 2007 Author Share Posted August 13, 2007 so will that affect my temp? Link to comment Share on other sites More sharing options...
Eagle Posted August 13, 2007 Share Posted August 13, 2007 If anything, it would make it run warm. However ... ... if you don't have a sealed system, you may have air in the system. Ait migrates to the highest points -- which happens to be where the temp sender is. You may be running hot and not know it because your sensor isn't getting any coolant flowing past it. Link to comment Share on other sites More sharing options...
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