Question about Chevrolet Astro

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Heat into the cabin. Summer time ia a problem for my car. When I drive on the highway and the engine really works - often when the overdrive hits in - I get a lot of really hot air into the cabin. I have tried to lock the vacuum valve to prevent hot liquid into the heater panel. Valve is closed - put same heat. I also have problem with regulating heat into the coupe. Either cold (all the way down) or hot adjusting just a few mm upwards. 4,3 litre engine

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  • morten_grepp Sep 14, 2010


    This would be nice - but will not prevent heat throug the the normal heater ducts.

    There must be some extra shield inside the dashboard that let this heat come throug.

    I have problem with the heat regulation - and I think that in the end of this wire - I have a problem.

    Thought before I closed the inlet hot water valve - that the problem was the vacuum level dropping when engine is really working hard.

    This problem will be the "to be or not to be" for my old car.

    Best regards

    Morten Grepperud



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If you hadd tried the ultimate of stopping the hot watere circulation into the cabin then the other option is to make a full scale insulation of the inner side of the cabin and the side of the engien room to the dash plate.
You must use about three layers of insulation sheet that can be pasted down and covered by a good carpet.
Use two layers of flexible thermcole sheet along with a sheet of good insulation(asbestos) on the outside as an insulation. Have the inner side also mounted with two layers of insulation material best available to you.
There be no gap or holes fromt he engine room as all wires or pipes must be covered well.
If an Aluminium plate is used to cover the outside of the insulation in the engine rooom is will help a great deal to dispell all heat.
I am sure this must solve the issue along with making your AC more efficient.

Posted on Sep 08, 2010


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