Cooling system is acting up on my Toledo.
started by loosing coolant,
I have flow through the system, i can see it trickling back from the small return pipe on top of the header tank which makes me think the waterpump is ok
Also the heater matrix heats up and cools down, on idle it's generally cold but has been known to get warm with the engine. but is always warm above idle speeds. But also fades away at high rpms, like when over taking something...
I thought it might be blocked and the coolant was a manky brown colour, so i flushed it.
flushed clean and clear, however all the pipework was stained with an orangey deposit, like rust if you will.
on re-filling the system it was a painstaking process, and took a while to do.
After all this it started blowing coolant out the header tank overflow, and built up excessive pressure - the top and bottom rad' hoses were firm with internal pressure.
This led me to thinking the thermostat was stuck and therefore removed it (I've ordered a new one to be safe)
after flushing and re-filling it the second time the overflowing has simply gotten worse, i now cannot go 500yds without the coolant level raising in the tank.
Only does it under load though, when it's idling it's fine and everything settles down, the coolant level returns to normal and the pipes remain soft.
Drive it, and it overflows and expands again, but stays that way until you either let it cool naturally or release the pressure by venting the header tank.
a guy from my local motorworld was being nosey and reckoned it'd had radweld in it at some time in it's life. Now i dont know what readweld looks like so could be a load of bunkum.
It has been suggested to me of HGF and gasses leaking into the cooling system, but there is no unusual odour there at all, and no mayy on the dip-stick etc
exhaust gasses from the tail pipe are clean and clear also.....Bizzarre
Help?
started by loosing coolant,
I have flow through the system, i can see it trickling back from the small return pipe on top of the header tank which makes me think the waterpump is ok
Also the heater matrix heats up and cools down, on idle it's generally cold but has been known to get warm with the engine. but is always warm above idle speeds. But also fades away at high rpms, like when over taking something...
I thought it might be blocked and the coolant was a manky brown colour, so i flushed it.
flushed clean and clear, however all the pipework was stained with an orangey deposit, like rust if you will.
on re-filling the system it was a painstaking process, and took a while to do.
After all this it started blowing coolant out the header tank overflow, and built up excessive pressure - the top and bottom rad' hoses were firm with internal pressure.
This led me to thinking the thermostat was stuck and therefore removed it (I've ordered a new one to be safe)
after flushing and re-filling it the second time the overflowing has simply gotten worse, i now cannot go 500yds without the coolant level raising in the tank.
Only does it under load though, when it's idling it's fine and everything settles down, the coolant level returns to normal and the pipes remain soft.
Drive it, and it overflows and expands again, but stays that way until you either let it cool naturally or release the pressure by venting the header tank.
a guy from my local motorworld was being nosey and reckoned it'd had radweld in it at some time in it's life. Now i dont know what readweld looks like so could be a load of bunkum.
It has been suggested to me of HGF and gasses leaking into the cooling system, but there is no unusual odour there at all, and no mayy on the dip-stick etc
exhaust gasses from the tail pipe are clean and clear also.....Bizzarre
Help?
