Pictured above is an upper radiator hose on a 2002 Subaru Outback as you can see in the picture it is full of stop leak. The radiator was over 60% restricted after installation of the stop leak by another repair shop to the point where the vehicle overheated where as it never had any overheating problems prior to the stop leak being introduced into the cooling system. The car now needs a radiator, head gaskets, attempt to clean or replace the cylinder heads, most likely a engine block, all cooling system hoses and a heater core. A very unfortunate set of circumstances. As soon as the Technician removed the upper radiator hose we knew it was going to be bad.
I have tried numerous time to suggest that Stop leak is a terrible idea, and will continue to try and post pictures as to why.
Pictured below is the same stop leak crystallized in the cylinder head passages, and engine block passages there is now good way to remove it all is literally in solid chunks through out the cooling system.
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