dont really understand how it works but i guess i did lol
Disco 2 ac not cooling
- Thread starter mad85
- Start date
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im thinking about adding valves to open / close during summer/winter to avoid having to remove the dashboad. adding valves to the existing factory setup is very hard but i was thinking about using the blanked off hoses originally used for the egr cooler. Any reason why that wont work? I see that i can use the feed from the oil cooler and add a shutoff valve there and then use the return to the expansion tank
something like this i think would work nicely:
something like this i think would work nicely:
Last edited:
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The coolant always flows through the heater matrix, electrically operated flaps control how much air flows through them.
You don't need to take out the dash to remove/replace the motors (at least on the p38, i suspect the disco is similar)
You don't need to take out the dash to remove/replace the motors (at least on the p38, i suspect the disco is similar)
i would need some guidance on what i can check however @sierrafery said that there is no way i can access motors or the flaps without total dash removal 
discool
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As you have said earlier you had the A/C checked was ok by a specialist, but if you have climate control was that also checked to be functioning as it should.i would need some guidance on what i can check however @sierrafery said that there is no way i can access motors or the flaps without total dash removal
as i have "fixed" the issue by isolating the heater matrix im quite sure "something" is not right under the dashboard. i know from the self-diagnostics that the servos are working fine and i also know this because it does change the temperature when i set the temperature up. i suspect that the flaps are not closing fully or are bent, either way its a dashboard out job
sierrafery
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I double checked the coolant flow diagram and i am convinced now that you can simply stop the flow toward the matrix from the top hose with a simple mechanical valve without affecting the engine's cooling nor the fuel cooler's function, cut the pipe in the area pointed with red and insert something like in the pic with proper IDs to fit that hose
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sierrafery
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No it won't, the fuel cooler gets flow direcly from the bottom of the radiator, the return from the matrix goes into a T piece at the end of the cooler where it meets the outlet flow of the cooler when the thermostat in that piece is open cos when it's cold outside there is no flow through that cooler anyway untill the thermostat opens at 82*C and then it acts as a fuel heater not as a cooler, actually when it's hot the fuel will be better cooled without back flow from the matrix, i studied well how it works, believe me or not, your choice if you want to overcomplicate a simple thing with more valves and piping
yes, you re absolutely correct, i didnt notice the T at the fuel cooler (or heater!). coolant coming from the heater matrix does not actually go in the fuel thing
