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Changed thermostat and new radiator cap, worked ok for about 5 weeks ok. Temp gauge was moving toward H. Got home let it cool and removed cap and antifreeze was gone from radiator top. it took about half cup to 1 cup to fill radiator.
Found the coolant reservoir full of antifreeze. Some fluid under reservoir. So I’m thinking it overfilled?
So this scenario keeps on repeating and I find air on the top of radiator.
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Could be radiator cap not letting the coolant to be pulled back in radiator from overflow after it cools. I have also seen the hose that transfers the coolant from radiator to overflow to be loose or leak, and when it goes to pull the coolant back it also sucks air. So when cool check the hose to the overflow is good and also if it goes through the lid of the overflow, check hose in the overflow, if those good, then maybe the cap could be the problem. Sorry did not realize you changed the radiator cap.
Make sure the cooling system has been properly bled. Trapped air in the cooling system can cause this to occur.
[quote=”Tri9SS” post=170857]Could be radiator cap not letting the coolant to be pulled back in radiator from overflow after it cools. I have also seen the hose that transfers the coolant from radiator to overflow to be loose or leak, and when it goes to pull the coolant back it also sucks air. So when cool check the hose to the overflow is good and also if it goes through the lid of the overflow, check hose in the overflow, if those good, then maybe the cap could be the problem. Sorry did not realize you changed the radiator cap.[/quote]
Thank you. That small hose looked swollen but was intact. I made sure the clips on the hose ends were secured with new clips.
I blew air into the reservoir hose and it was solid.[quote=”cap269″ post=170883]Make sure the cooling system has been properly bled. Trapped air in the cooling system can cause this to occur.
https://www.youtube.com/watch?v=zUpXgAJ1gjU%5B/quote%5DThank you. I bled it from the bleeder valve first then I did like the vid. I saw some bubbles come out to the top. Car got hot enough that I think it is ok.
I checked again first the bleeder valve and fluid was there but still air on rad.
Today I did the reservoir tubage so I’m crossing my fingers that I fixed it.[quote=”CatRock” post=170854]Changed thermostat and new radiator cap, worked ok for about 5 weeks ok. Temp gauge was moving toward H. Got home let it cool and removed cap and antifreeze was gone from radiator top. it took about half cup to 1 cup to fill radiator.
Found the coolant reservoir full of antifreeze. Some fluid under reservoir. So I’m thinking it overfilled?
So this scenario keeps on repeating and I find air on the top of radiator.[/quote]
you can rent a ratator pressure pump from a lot of auto part stores… you connect it to the cap and pump us some presssure in the system… and see if you see any leaks coming out…. also you said it looks like one of your hoses is starting to bulkle…. that is like the first sign before it cranks and will burst… it should be replaced ASP if you see signs of any hoses going bad…. because you dont want to over heat and warp your head… and pay like $1500 for it to be repaired and take your hole engine apart to do it… also dont forget to burp your system after replacing any hoses or draining the system to get any air bubbles outWith the engine cold, grab the bottom rad hose (the “outlet” hose) and squeeze it firmly. If you can collapse it, the internal stiffener has rotted away, allowing the hose to pinch shut, at least partially, when coolant is flowing during operation. (The bottom hose connects to the suction side of the water pump, and this suction flow can collapse a weakened hose.) It might be contributing to your issue.
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