forthbridge
Active Member
That is a superb schematic, when your L322 isn't driving you potty could you do one for the P38?
Getting back to your problem, that's really interesting, I've got to agree with you - first of all the top bleed hose to the expansion tank should not be under water ( coolant) otherwise it wont work as a bleed, hence the reason to keep the level in the tank set. If the transmission cooler is knackered and not allowing a flow when its thermostat tells it to this could cause a little localised boiling (?) which maybe would not manifest itself until the engine was cold due to pressurised coolant sealing this self induced air lock when hot. When cold the over pressure to blow coolant out of the ET can't come from the top ET hose as this should be venting in the air at the top of the Tank. So as you've only got one hose on the ET that is permanently submerged I'm with you this has got to be where the trapped pressurised air is which blows your coolant out of the Cold engine.
I hope the replacement sorts this out.
Getting back to your problem, that's really interesting, I've got to agree with you - first of all the top bleed hose to the expansion tank should not be under water ( coolant) otherwise it wont work as a bleed, hence the reason to keep the level in the tank set. If the transmission cooler is knackered and not allowing a flow when its thermostat tells it to this could cause a little localised boiling (?) which maybe would not manifest itself until the engine was cold due to pressurised coolant sealing this self induced air lock when hot. When cold the over pressure to blow coolant out of the ET can't come from the top ET hose as this should be venting in the air at the top of the Tank. So as you've only got one hose on the ET that is permanently submerged I'm with you this has got to be where the trapped pressurised air is which blows your coolant out of the Cold engine.
I hope the replacement sorts this out.