S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

Thermo time switch

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 10-23-2005, 02:52 AM
  #1  
Member
Thread Starter
 
bcmbcmbcm's Avatar
 
Join Date: Mar 2004
Location: Orange County, CA
Posts: 109
Likes: 0
Received 1 Like on 1 Post
380 SEL 1982
Thermo time switch

Can anyone explain what the thermo time switch does and where is it located on a 380 SEL?

Thanks!
Old 10-29-2005, 10:56 PM
  #2  
Almost a Member!
 
w123_w126's Avatar
 
Join Date: Jan 2004
Location: Florida
Posts: 64
Likes: 0
Received 0 Likes on 0 Posts
85 500 SEL
It controls the cold start valve, shutting it off at 42 degrees F.
It’s located on the upper part of the intake manifold.
Attached Thumbnails Thermo time switch-thermo-time-switch-2.jpg  
Old 10-30-2005, 11:23 AM
  #3  
Member
Thread Starter
 
bcmbcmbcm's Avatar
 
Join Date: Mar 2004
Location: Orange County, CA
Posts: 109
Likes: 0
Received 1 Like on 1 Post
380 SEL 1982
Thanks! What does the cold start valve do?

What does the cold start valve do? What are some symptoms if either is failing?
Old 10-30-2005, 02:04 PM
  #4  
Almost a Member!
 
w123_w126's Avatar
 
Join Date: Jan 2004
Location: Florida
Posts: 64
Likes: 0
Received 0 Likes on 0 Posts
85 500 SEL
The CSV introduces additional fuel to a cold engine to aid starting and warm the engine faster. Hard starts in cold weather with a cold engine and flooding in a warm engine are two common symptoms of failure.
Old 05-03-2006, 04:13 PM
  #5  
Member
Thread Starter
 
bcmbcmbcm's Avatar
 
Join Date: Mar 2004
Location: Orange County, CA
Posts: 109
Likes: 0
Received 1 Like on 1 Post
380 SEL 1982
what if the engine runs WORSE when warm?

I have figured out that my engine runs like a champ when ice cold, but when
I reach 40 degrees I get a little off idle hesitation. I have changed my thermotime
switch. Does this mean that the CSV is at fault? Is it simply 'on' (more fuel=more power) or
'off' or are there variable levels of operation?

Also, can I bypass the CSV so I get max fuel all the time?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Thermo time switch



All times are GMT -4. The time now is 03:58 AM.