2008 grand vitara had radoator hose collapsed

I would start by replacing the radiator cap. A bad cap can stop the flow of coolant from the coolant reservoir back into the engine when the engine cools down. This will cause a vacuum and collapse the hoses.

The other possibility is the lower hose is starting to get weak. This compounded with a radiator cap that is not functioning correctly will cause the the hose to collapse when the engine cools off.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

I would start by replacing the radiator cap. A bad cap can stop the flow of coolant from the coolant reservoir back into the engine when the engine cools down. This will cause a vacuum and collapse the hoses.

The other possibility is the lower hose is starting to get weak. This compounded with a radiator cap that is not functioning correctly will cause the the hose to collapse when the engine cools off.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

By collapsing you mean sucking together . . If so this indicates a vacuum being generated in the radiator by the water pump especially under rpm,s. This indicates that the thermostat may not be in the right way or you have the incorrect thermostat. I know of bottom radiator hoses sucking in from blocked radiator cores ( they can come with wire coil to prevent this) but it is difficult to see how this could be the same for the top hose which in effect is a delivery hose to the radiator.

replace radiator cap

For radiator replacement procedure.I suggest you to click the link below and follow the detailed procedure :-----
How to replace Radiator? http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-audi-and-vw.html
----------HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

------------
HOW TO REPLACE A LOWER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html

-------------
How to replace Radiator on Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-acura-car.html

------------
How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

--------

HOW TO PRESSURE TEST A RADIATOR AND CAP

http://schematicsdiagram.blogspot.com/2011/07/how-to-pressure-test-radiator-and-cap.html

----------------

HOW TO REPLACE A RADIATOR

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator.html

------------------
HOW TO REPLACE A RADIATOR SUPPORT http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator-support.html
-----------This details will help.Thanks.

does the upper and lower hoses seem to be the same temp when car begins to overheat? ore the radiator cooling fans coming on before the car overheats? did you pressure test the cooling system and radiator cap? also may want to remove the lower hose and flush the radiator. is the check engine light on and does it run bad?

the hoses are in need of springs inside on that model they come with these from the factory to keep them from collapsing also the thermostat is delaying in opening up to creat a vacuum so watch your temp sensor in the future for over heating

Heres a couple of things you can check. Start your car and remove the radiator cap,(before it gets hot mind you) when it reaches norm operating temp, look inside radiator to see if water is circulating. If its not moving, its a bad water pump. Also, youre hoses should never collapse, if they collapse when they get hot maybe you need new hoses? Finally, if those dont work, flush out your radiator. Open the bottom cockpit and use a garden hose and let it flush out the system while the car is running, about 10 mins should do the trick. If the radiator looks clean inside then it doesnt need flushed.

The cooling water doesn't seem to making it through the radiator. Look for plugged radiator, blocked upper or lower hose, or ineffective water pump. Remove the inlet and outlet hose after draining coolant from the radiator. Hold your hand over the lower hose outlet while someone fills the radiator with cold water. When full, leave the cap off, then remove your hand from the outlet. If the core is unobstructed, the water will rush through it in a few seconds. Check the upper hose inlet--there should be no obstruction. Inspect the interior of each hose looking for collapse or other blockage. If ok, that leaves the water pump--remove it from the engine and check that the impeller turns solidly with the driving pulley. Any looseness there is grounds for replacement. Hope some of this helps!

Hi:

If you have a leak near the lower radiator connection that just started, it is either a failed hose, or possibly a radiator core leak that is dripping down to that area.
If you havent changed your radiator hoses for awhile, and they feel soft, it isn't a bad idea to change them both. If you drain your radiator to change the hoses, this would be a good time to inspect the radiator, and perhaps you will find the source of the leak.