There's a new heater matrix going in mine in a couple of days.Olav said:Apart from the smell I cannot find where the coolant goes. Has anyone got experience with a leaking heater core and does anyone know where the coolant leaks on or into if the leak would be in the core? Or any other suggestions are greatly apreciated.
For me, I have slow coolant loss from the header tank and a smell of coolant, after about 10+ mins of running. If I have the HEVAC on "LO" (- where the flaps block air going through the matrix), then there is no smell. But if, after having it on "LO" for a while, then increase the temp settings, then there is a horrible smell of coolant. The matrix is leaking coolant vapour into the HEVAC box, then when the temp flaps are opened, all that coolant vapour is injected into the cabin. Nice. I've now lost soo much coolant (due to top-ups every few days,) that my "coolant" is now water - it's not green any more.....
Does anyone know if ethylene-glycol can be ingested from the vapour? If so my liver is screwed. Should this happen, is the body capable of removing the ethylene glycol crystals over time, or do they just stay there forever?
I don't think you'll find any trace of your coolant loss. The stored heat in the heater matrix will just evaporate it off into the HEVAC box - especially if it is a super-slow pin-hole leak.
The part number is STC3261, it's about 200 quid to buy ,and a pain in the rear to change.