hello I am new to the forum. I noticed that the sleeves swell a lot but the car apparently works well. every exit I have to add water (from min to max) where does it end? there are no losses ... camaro 87 305tpi thanks

 

When you say "sleeves", do you mean the hoses? Particularly the large ones connecting to the radiator?

If they "swell", that is not good. They do that because they are getting old and soft. Sooner of later, they will burst. Replace them.

If you have to add coolant, then it's going away, somewhere. It may seem like there are no leaks - you may not see them - but there is at least one, somewhere. Most likely, it's the water pump shaft seal; the coolant comes out behind the pulley, and is thrown out in a fine mist and disappears. Look at the lower radiator hose, from below (laying on the ground looking up at it): if there is a trail on the underside where coolant has been running down the bottom of it, then you need a water pump, in addition to the hoses. Do it all at the same time.

 

I mean the pipes😂not known any trace of coolant on the ground or on the pipes ... I know that a water pipe also enters the suction, what would it be? thank you

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When you say "A water pipe also enters the suction" are you referring to the coolant hoses that connect to the throttle body to warm it ? If so it's there to help emissions by warming the air through the TB and it may be helpful in preventing throttle body icing . Now as to finding out where the coolant is going , a "cooling system pressure test" done right will absolutely show where the coolant is being lost , but like Sofa said if your hoses are squishy you've got some "Deferred Maintenance" issues to deal with anyway and a good visual inspection while replacing the squishy hoses just may reveal the leak . Once all external leaks have been ruled out , then the pressure test comes into play , and hopefully it don't get to that , internal leaks generally being more expensive than external .

I know you say you don't see it leaking onto the ground , but either by being slung around by the water pump pulley or maybe being burned off on the hot exhaust , coolant can do a pretty amazing disappearing act under such circumstances ...

 

then I replace the hoses then try again. even for long journeys the car does not heat and works well, the starter is good, the liquids are not contaminated so this gives me hope that there is no problem with the engine, a hypothesis I had already thought of! thanks to orange and sofa

 

Updating ...i replaced termostat and coolant hoses. When the engine is hot the coolant hoses are hard. It is normal? The car is fine and the temperature is about 200-210 marching

 

Yes, all of that sounds normal. Glad you got it working right.

 

after a trip when the engine cools down I check the level and I have to add a glass to the recovery tank. the car is fine, I see no leaks, but the hard pipes and the level that drops make me think of a problem with a cylinder head .... what do you say?

 

If you had a water leaking problem with your head the white steamy stuff coming out the exhaust pipes would be obvious. How's the carpet in the passenger footwell look? Dry or wet?
Wet means your heater core is likely leaking

 

the floor is dry.I put the system under cold pressure and I see no leak. when hot, the pipes are very hard, there is a lot of pressure, and this I do not know if it is normal, and no leaks. when the engine cools the level in the recovery tank, a glass is reduced.

 

Pressure is normal. There should be about 16 psi in the cooling system when it's fully hot. The radiator hoses will feel quite hard.

Leave the level where it is (don't refill it) and see if it keeps going down every time you run it. It should expel enough coolant to a point that when it expands, it no longer expels any more, and the level should then stay the same for a long time.

 

ok I try and let you know in the next few days.thanks

 

Water pump could be leaking through the weep hole as well.

 

the water pump is dry, there is no trace of leakage

 

When the water pump leaks, the coolant goes onto the back of the pulley, and gets distributed all over everything as a fine mist. Very hard to "see".

Sometimes, they do leak enough, that a drip will run down the bottom of the lower radiator hose. If you get up under the car and look up, you can see a trail where it has run down.

 

the rubber hose from the radiator and the plastic jug are problem areas as well. May have a crack or leak there.

 

the radiator and pipes are new, the water pump is not but there is no trace of coolant

 

I'm talking about the little hose from radiator cap area to the plastic overflow jug. common for those to be a source of a leak