Pagoda SL Group
W113 Pagoda SL Group => Body, interior, paint, chrome, and cosmetic items => Topic started by: StevenF on July 30, 2018, 19:57:52
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I needs some advice. When driving on the highway, I feel a hot breeze coming from under the steering column which blows approximate at my calves. To explain it better, it is not "heat" because our cars "run" hot, but a constant flow of air. I will be installing insulation under the carpets in the very near future, but this "hot blowing" needs to be addressed. Is there a grommet lower down the firewall that would allow air to come through when highway driving? Is there a valve that needs to be closed?
I do not have a manual on the proper way to set the heater and I am not sure what all the levers do--but they seem rather easy to figure out---any advice with regards to heater operation would also be helpful. Currently I have the top left lever shifted all the way to the left and all others are set in the middle.
Regards
Steven
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With the levers set as you described there should be no hot air coming into the cabin and the heater valve should be closed. Take a look at the photo here (scroll down):
https://www.sl113.org/wiki/Electrical/HeaterControlValve
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Alfred,
Thank you for the information.
The latest update : I took my car on the parkway and reached underneath to feel where the air is coming in---
Low and behold, there are 2 openings/holes on the steering column. When I put my finger in the hole the air stopped coming through.
I did the same for the second opening and the air stopped coming through.
Does anyone know what those 2 openings are for? I plan on taking a small piece of metal tape (like the tape for a dryer vent) to cover the holes .
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Post some pictures. It would help us to identify the holes easier.
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There is a bushing insulating the steering column from the engine bay where the steering shaft enters the firewall plate. If this bushing is missing it would explain the hot air.
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Not only that, but your car is probably a whole lot noisier than it should be also. Holes that large (but even tiny holes) will let a ton of engine noise into the cabin. One approach is to put a work light in the cabin, at night in the garage, and then looking under the hood at the firewall to track down any holes / openings that let noise through. Close them. You will be surprised at the difference in interior noise.