Coolant Leak in 2005 S80 at the Radiator - biodegradable V Cars?
Similar Symptoms - very slow coolant loss/leak. Local Volvo dealer advised that there are numerous plastic parts (we are going Green - right?) including both sides of the main radiator. S80s do run hot it seems - I see on the internet stories about cracks in plastic tanks, houses, main radiators. I was high opinion on Volvo Cars, but NOT anymore. I am shopping for extended warranty plan , German or Japanese car and bicycle - go Green!
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Coolant have colour just for this same thing so that you can see where it is leaking. I use green colour coolant which is most common and when I need to find a very minor leak (major ones are visible as green crystalline deposits) normally I use UV light. Under UV light the coolant shows florescence.
Other things to check in such cases are: Radiator cap and Coolant valve which often get choked and do not open resulting in over heating of engine.
One of the gaskets has blown at a point where the a water jacket is blowning into the cylinders but not mixing with an oil jacket on the heads. Try to use some Bars Leak and see if you can get it to seal and if not, their are also aluminum shavings mixed with sealer for some of the worse problems. If it seals you will then know that it will need a gasket replacement at some point
Do a compression test and look for symptoms of head gasket problems. If the leak is internal, then the most common cause
is a worn head gasket. Water (or coolant) leaks internally through the head gasket reaching the cylinders where it gets vaporized. Symptoms
are coolant fluid level going down (with no external leaks), bad performance, loss of
compression, overheating, white smoke from
exhaust because of vaporized coolant, traces of fuel in coolant reservoir etc.
If there is no head gasket problem and there is no overheating, then the leak is external. Check pump, radiator and coolant lines.
Check compression. If the leak is internal, then the most common cause is the head gasket. Water (or coolant) leaks internally through the worn head gasket reaching the cylinders where it gets vaporized. Symptoms are coolant fluid level going down, bad performance, loss of compression, overheating, white smoke because of vaporized coolant from exhaust, traces of fuel in coolant reservoir etc.
If head gasket is Ok and there is no overheating, then the leak is external. Check pump, radiator and coolant lines.
First I would check to see if the cars radiator is full. This will eleveate one big problem. Second I would look under the car to see if the coolant tank is cracked and losing coolant because of this damage. Third if tank is damaged , and I believe this is what you will find, you will need to replace your coolant tank. If you call around to your local salvage yards you will be able to pick one up for a lot less than dealer price. I hope this has been helpful to you. GOOD LUCK.
I think it seats on the top frt corner of the engine(follow top radiator hose).
shouldn't be hard to do , you will need torx heads for bolts. Coolant will leak out in small amount , top it up after repair.
Your problem is something like either a hose clip loose /biting into a hose and split it/a metal hose rusted and has a pin hole or a welsh plug (core plug) leaking. or a water plate gasket IE W/Pump/Manifold etc
Because it drips of the centre of engine dosenot mean it coming from the bottom of engine...