Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-08-2003, 10:38 PM
Registered User
 
Join Date: Oct 2003
Posts: 29
Why is my car a clock? or does it have a beating heart...help..a cardiologist needed?

Here is the deal.

when stopped with the engine running (regardless if I am in gear or not), I can hear a tikcing noise...like a clock......which seems to be coming from somewhere behind the center A/C vents or behind the radio...(ya know that area....in the middle)...

When I put my hand on that area...I can feel it pulsating as it ticks...

It is a tick that comes on every 5 seconds ONLY when my A/C or heater is on (and both work A okay....actually the A/C is more like a freezer, and the heater...will get you sweating)....

Very weird thing!!..

My car is a 1996 C220, 74K miles.

I would appreciate any ideas.....no matter how weird they are...they will not be weirder than the problem itself.
Reply With Quote
  #2  
Old 12-08-2003, 11:01 PM
kennysin's Avatar
Registered User
 
Join Date: Jan 2003
Location: Singapore
Posts: 59
I have a similar slow "ticking" that is audible and transmitted through my steering. It is only when the A/C is on, and felt only when idling. It occurs when my thermostat is set on less than maximum cold, and happens on a cold day when the A/C compressor kicks off. I have located it to a ?solenoid switch which regulates the heating. When the thermostat is activated, it switches the A/C compressor and activates this switch which then causes this clicking sound. Being in the tropics, my heating system has been disabled (hot water inflow and outflow blocked-up and excluded), a common practise here.

However, I am not sure if this 126 system is applicable to your model, although the 5-sec interval sounds remarkably similar. I hope this helps.
__________________
1983 w126 280SE - daily drive
1983 w123 200 - sold
Reply With Quote
  #3  
Old 12-08-2003, 11:13 PM
Registered User
 
Join Date: Oct 2003
Posts: 29
I am not sure either....

but thanks for your reply kennysin......hopefully this thread will lead somewhere......and that somewhere being anywhere.
Reply With Quote
  #4  
Old 12-09-2003, 12:06 AM
Registered User
 
Join Date: Oct 2003
Posts: 29
A piece...of what over where????

what r u talking about.......

Are u telling me to forget about it...

Or are u eluding that I tape something ..if this is the case ...then what exactly am I taping.
Reply With Quote
  #5  
Old 12-09-2003, 12:50 AM
Registered User
 
Join Date: Apr 2000
Posts: 236
I'd put a piece of tape over the tick and forget about it.
Reply With Quote
  #6  
Old 12-09-2003, 11:55 AM
Registered User
 
Join Date: Oct 2003
Posts: 29
so where are all these mechanical minds??!

come out , come out ..wherever you are!!??
Reply With Quote
  #7  
Old 12-09-2003, 01:35 PM
Rafi's Avatar
Registered User
 
Join Date: Jan 2003
Location: Garden State
Posts: 474
I read somewhere on the forum that it was the monovalve for the climate control
Reply With Quote
  #8  
Old 12-09-2003, 10:39 PM
Registered User
 
Join Date: Oct 2003
Posts: 29
yeah I read that too ...but I don;t know if this is true for my car.....and if it is true...can anyone provide me with any instructions as to how to reach the monovalve, to fix it or replace it.

Thanks in advance
Reply With Quote
  #9  
Old 12-10-2003, 01:52 AM
moparmike's Avatar
You will rue this day...
 
Join Date: May 2003
Location: NW Arkansas
Posts: 732
Get a shirt that says "Bomb Squad" on the front, and "If you see me running, try to keep up."

















THEN START RUNNING!!!! :p :p
Reply With Quote
  #10  
Old 12-10-2003, 09:15 PM
Registered User
 
Join Date: Oct 2003
Posts: 29
what an idea.........?!!!

come on ....let's be serious for a second here?!

Any legite' ideas out there??
Reply With Quote
  #11  
Old 12-10-2003, 10:05 PM
haasman's Avatar
Registered User
 
Join Date: Jun 2001
Location: San Francisco, CA
Posts: 3,097
The 190e has the same ticking .... I am glad you posted this. I am curious as well as to why and where it is coming from.

Anybody encounter this before?

Haasman
__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
Reply With Quote
  #12  
Old 12-12-2003, 11:38 PM
DR.DIESEL's Avatar
Senior Member
 
Join Date: Mar 2003
Location: Puget Sound, Washington St.
Posts: 522
Yes, the mono valve is a noisy little guy on w202 c-classes.
It is normal. There are no "factory" fixes. However, Some people
have been known to re-mount them with different materials.
Sadly, it is the coolant that transmits the thumping and the heater
core and box amplify the noise.
Dr.D
Reply With Quote
  #13  
Old 12-13-2003, 04:17 AM
Registered User
 
Join Date: Oct 2003
Posts: 29
Dr D....thank you for your reply.....can U advise me of a way any way to be able to minimize that noise since it is normal.

You mentioned some people were able to fix it ...or at least minimize it, how?

and what is the monovalve and where is it ??
Reply With Quote
  #14  
Old 12-13-2003, 09:51 PM
Registered User
 
Join Date: Apr 2000
Posts: 236
Changing brake pads

Gentlemen: I had others install new pads on my '97 C280 Sport at around 100K miles. Now I was given a set of kevlar/metal pads and I would like to install them my self. Would any one be so kind as to tell me if this is a complicated job on the W202 car or is it like the DIY section shown for the 320E, which really looks simple. I have heard that the job is easy but would like some sort of cofirmation. Much thanks, and if a silver C280 passes through your car on the way to Florida in January, it might be me. Thanks for any help. fearlessone2@yahoo.com
Reply With Quote
  #15  
Old 12-13-2003, 09:59 PM
Registered User
 
Join Date: Apr 2000
Posts: 236
Guys: I have a C280 car and do not hear this sound. I thought the question was regarding another chassie. I have not heard any ticking coming from my dash. However, after my son cleaned out my computer, I notice that my question regarding brakes is now shown in the discussion. In any event, sorry about this, but I still would like to have some help regarding replacing brake pads on my W202. Thanks and sorry for the digression of an interesring subject. PF
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:24 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page