Re: [MBZ] 85 300D monovalve

[Jim Cathey via Mercedes]

You sure you didn't blow the wiring to yours?  With the ACC set to OFF,
there should be 12V on the plug to the monovalve.  It should be strong
enough to light a lamp, etc.

-- Jim
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Re: [MBZ] 85 300D monovalve

[Michael Esh via Mercedes]

Hi Andrew, 
I finally installed the solenoid you sent me. Unfortunately it is non 
functional. After installing and seeing no change in in my heating issue,  I 
took it back out and tried to activate using 12 volts from my battery to the 
connector posts on the solenoid and there was no response. It should pop the 
valve up and down upon application of electricity. There was zero action.  I 
ended up getting another one locally and will be testing it later today. 
I will gladly to pay for shipping and the trouble you went through to send me 
the items. Just let me know the amount and where to send. 
Thanks again for your effort,
Mike

Michael E. Esh


> On Feb 1, 2018, at 7:34 PM, Andrew Strasfogel  wrote:
> 
> Mine may not perform any better, but it sure as hell looks beautiful compared 
> to the one you got.  I had the same symptoms with my defective monovalve: 
> heat at low speeds followed by increasing degrees of frigidity, depending on 
> the ambient temperature.
> 
>> On Feb 1, 2018 6:05 PM, "Michael Esh"  wrote:
>> I just replaced the damaged mono valve on the car. The one I just took out 
>> has a blue/green crusty substance all over the screen and any metal part. 
>> This is new in the last week. This stuff was not there a week ago. What 
>> would cause this?  The only change was putting a valve in with poorly 
>> soldered solenoid. I pulled it apart last week and ruined the connections.
>> The latest symptoms are good heat at below 2000 RPM’s but then heat would 
>> cut out completely at any thing over 2000. Fan would stay on just heat out 
>> the vents.
>> I’ll test out the new monovave assembly I received from Andrew tomorrow 
>> morning.
>> 
>> Mike
>> 
>> 
>> 
>> 
>> Michael E. Esh
>> 
>> 
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Re: [MBZ] 85 300D monovalve

[fmiser via Mercedes]

> Michael wrote:

> The latest symptoms are good heat at belowq 2000 RPM’s but then
> heat would cut out completely at any thing over 2000.

Classic symptoms of damaged diaphragm in the monovalve.

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Re: [MBZ] 85 300D monovalve

[Jim Cathey via Mercedes]

That's pretty heinous.  Could there have been galvanic action driven by the
botched wiring to the solenoid?

-- Jim
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Re: [MBZ] 85 300D monovalve

[Michael Esh via Mercedes]

I wondered about the fluid as well.  I’ll have it tested tomorrow. It is the 
right color but I don’t remember if I have ever changed it in this car.  The 
odd thing is that I did not see this build up 2 weeks earlier when I had the 
part out to check for holes in the diaphragm.

Michael E. Esh


> On Feb 1, 2018, at 10:33 PM, Curley McLain via Mercedes 
>  wrote:
> 
> Cooper sulfate.  Corrosion from copper or brass.  Do you have good Go5 in the 
> radiator at the proper ratio?
> 
>> Michael Esh via Mercedes 
>> February 1, 2018 at 5:04 PM
>> I just replaced the damaged mono valve on the car. The one I just took out 
>> has a blue/green crusty substance all over the screen and any metal part. 
>> This is new in the last week. This stuff was not there a week ago. What 
>> would cause this? The only change was putting a valve in with poorly 
>> soldered solenoid. I pulled it apart last week and ruined the connections.
>> The latest symptoms are good heat at below 2000 RPM’s but then heat would 
>> cut out completely at any thing over 2000. Fan would stay on just heat out 
>> the vents.
>> I’ll test out the new monovave assembly I received from Andrew tomorrow 
>> morning.
>> 
>> Mike
>> 
>> 
>> Michael E. Esh
> 
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Re: [MBZ] 85 300D monovalve

[Curley McLain via Mercedes]

Cooper sulfate.  Corrosion from copper or brass.  Do you have good Go5 
in the radiator at the proper ratio?



Michael Esh via Mercedes 
February 1, 2018 at 5:04 PM
I just replaced the damaged mono valve on the car. The one I just took 
out has a blue/green crusty substance all over the screen and any 
metal part. This is new in the last week. This stuff was not there a 
week ago. What would cause this? The only change was putting a valve 
in with poorly soldered solenoid. I pulled it apart last week and 
ruined the connections.
The latest symptoms are good heat at below 2000 RPM’s but then heat 
would cut out completely at any thing over 2000. Fan would stay on 
just heat out the vents.
I’ll test out the new monovave assembly I received from Andrew 
tomorrow morning.


Mike


Michael E. Esh


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