I've got a Peugeot 2.0L HDI 2003
over the past several months I've had issues with the cooling system, it hasn't overheated until recently but has had other issues.
It first started showing signs of problems when it started losing coolant, I checked all the hoses & anywhere I could think of to find a leak, to no avail (although when I turn on the interior heating I can smell coolant coming through the vents)
The level in the reservoir was forever dropping really low so I would top the coolant up, it also had bubbles coming into it form the small hose at the top of the reservoir. When I open the reservoir it was releasing a large amount of pressure & the level would risae significantly as if there was a blockage in the system. I've ran it like this for some time.
I changed the thermostat & temperature sensor to be on the safe side, then decided after being told it could be the head gasket purchased some Steel Seal (UK head gasket sealer) it's made the coolant very sludgy & dark) ( also did a flush of the system beforehand but don't think half the coolant even came out.
The problem stopped to a point in the sense the coolant level wasn't dropping as much anymore but now it leaks out of the reservoir cap only a small amount & recently it is overheating a little more than normal operating temperature.
I can't afford a large garage bill & just hope I've missed something simple, I forgot to mention that all the pipes are hot so it seems to be going around the system to some degree, I just wonder if it's a blockage or air in the system that won't come out.
Any suggestions would be really appreciated as I say I am on a very low budget