Any leakage indicates a problem. How much is too much? When you see a puddle on the ground, or your exhaust is white. Those are pressing issues.
If it ever gets low enough to get the temp gauge to move, you waited way too long.
If keeping the system 90% full requires adding coolant every day, you got a pretty annoying problem. I've run cars in this mode...
Every week, you got maintenance. My Honda's.
Every month, count your blessings. My old vw's.
Never.. your car is perfect. My metro surprisingly enough.
It's all relative to how often you want to open the hood. I don't mind once a week.
Whatever you do, don't add any of that radiator stop leak stuff. It works wonderfully, but has the nasty tendancy to coat the inside of your engine and plug small passages. This reduces the cooling efficiency and could compound your problem.
The gritty liquid stuff will ruin your engine over time but the dry metal shavings work quite well.
If there really is no leak then it is likely a head gasket allowing coolant to leak into the cylinder and go out the exhaust as steam.
Pressure test the system to determine where leak is originating
You have a coolant leak.You have a coolant leak.
pressurize the system. that'll make the leak leak faster and you should be able to find it easier.
You have a coolant leak somewhere. Fill and check underneath for any obvious leakage.
Yes, this is normally caused by a blown head gasket cracked or warped head or both. The intake manifold gaskets go bad and leak coolant also. The original Chevrolet stock intake gaskets were not so good.
Because some opening formed which is allowing coolant to leak out.
Replace the plugs or toss some bars leak in it. keep in mind however that when the plugs start to leak they nearly always need replacing.
Coolant should not be leaking from your transmission the only fluid in your transmission is transmission fluid. A faulty transmission seal can allow transmission fluid to leak out.
There SHOULD only be oil inside the valve covers. If they leak coolant you have a serious problem.
Any coolant leak can cause an overheat.Any coolant leak can cause an overheat.
If you do not visibly see a coolant leak, have the cooling system pressure tested. If the leak is not obvious it could be internal.