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  #11  
Old 03-08-2019, 10:46 AM
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Join Date: Jan 2018
Location: Charleston, SC
Posts: 172
Baby Unicorn Taco is on a distinguished road
Quote:
Originally Posted by talljames View Post
Hi semcoinc, my x5 e53 2005 4.4i heating is not working. I recently had my air con done and now I just have cool air even when I put the wheel on 3 red dots. I was thinking it might be the heater control valve and then I saw your post. So, hitting it on top actually worked? I am wondering if I might do this too.

cheers
Tapping it on top can sometimes unstick the valve. If it was stuck it won't last long though. If you put the heat on and it is blowing cold, then tap on the top of the HCV and the air suddenly blows hot, it is a good sign that it is the HCV that is bad. The tapping is just a temporary fix and will narrow down the issue.
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  #12  
Old 04-02-2020, 12:20 PM
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Join Date: Jan 2020
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The cone of the plunger doesn't appear to be removable
Was anyone able to remove it?
I tried the parts from this tutorial but they don't work well.

There are proper rebuild kits for $30
https://www.ebay.com/itm/173087670820

But I don't know if it's worth it, you can buy a new one for $30 as well
https://www.ebay.com/itm/282323254480

Granted Topaz is a cheap Chinese brand but it had great reviews.
https://www.amazon.ca/dp/B06XX854LZ/..._8-GHEbNJEER3R

The doubt I'm having of going with the rebuild kit is that I would have no choice but to stretch the rubber to get it over the plunger cone. It will stretch the rubber and create micro tears. The other disadvantage is that I only found those kits in Russia, Ukraine and Poland, so that's about 30 day shipping time.

I saw lots of YouTube videos and on most on them, this plunger comes apart. On some, however, it doesn't.
I definitely see that in my case it doesn't come apart.
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  #13  
Old 04-02-2020, 01:16 PM
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In the end I was able to twist off the top. But be careful, there's a thin plastic inside. Very easy to break.
Make sure you use some kind of cloth when grabbing the cope with visegrips to prevent damaging the metal.


This kit includes everything including the cones, but I think it's too expensive
https://www.ebay.com/itm/112177753023

Last edited by Bmwe5320023.0; 04-02-2020 at 01:25 PM.
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