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-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-19-2008, 11:07 AM
Registered User
 
Join Date: Jul 2008
Posts: 25
Block heater test?

Hi, is there a way to test a block heater to make sure it works before cold weather starts?
Reply With Quote
  #2  
Old 10-19-2008, 11:09 AM
Goatman's Avatar
2x Grand Champion
 
Join Date: Oct 2008
Location: Fort Myers, FL
Posts: 172
I always prefer the tounge on the connectors approach.....


Or you could check the voltage coming in or going out...
Reply With Quote
  #3  
Old 10-19-2008, 11:50 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
Block Heater test

Edited with BC's assistance:
1. Plug in for 3-5 hours...Is the Valve cover Toasty Warm...It works just Fine.

2.More difficult...With DMM set to "Continuity Test" apply leads to poles of engine block heater plug.[Then you can do #1 to double check]

3. If you stand Very Quietly and lean over the engine,You'll hear the Coolant
kinda gurgling.

thanks BC
__________________
'84 300SD sold
124.128

Last edited by compress ignite; 12-26-2009 at 10:01 PM.
Reply With Quote
  #4  
Old 10-19-2008, 12:05 PM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,394
Or simply feel the water jacket after the heater has been on for a few hours.
__________________

"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
Reply With Quote
  #5  
Old 10-19-2008, 12:10 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by compress ignite View Post
1. Plug in for 3-5 hours,get in MB, insert key, turn to "Run" ...Is engine at
operating temperature? If so it works.
The block heater will not raise the engine temperature to anything close to operating temperature. In fact, it will barely raise it off the peg.........rendering this method a bit useless.

One other possibility is to simply watch the electric meter. At 400W, you'll definitely see a difference in the speed of that wheel if the heater is drawing current. Quick and positive...........
Reply With Quote
  #6  
Old 10-19-2008, 12:30 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
Use an ohmmeter across the blades of the plug, should show some resistance/connection between the flat blades, and open/infininate from either blade to the round pin.

Or plug it in, when you unplug it you should hear or see a faint spark (in the dark is easier).
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #7  
Old 10-19-2008, 01:48 PM
Registered User
 
Join Date: Jul 2004
Posts: 78
Power meter to test block heater

I bought a power meter from La Crosse Technology (not very expensive) and use it to test whether block heater is ok. I plug it into the wall socket, extension cord from it to car, and block heater plug into extension. It will show watts being used if heater is working, 0 otherwise.
Reply With Quote
  #8  
Old 10-19-2008, 02:09 PM
Registered User
 
Join Date: Jul 2001
Posts: 897
Sheesh. Plug it in for 2-3 hours. Put hand on top of valve cover. If warm, block heater is working.

Rgds,
Chris W.
'95 E300D with block heater
Reply With Quote
  #9  
Old 10-19-2008, 02:20 PM
Jadavis's Avatar
Registered User
 
Join Date: Oct 2005
Location: Tennessee
Posts: 995
I have a power meter called a Kill-A-Watt. $30-$40, records power, current, and can do a running total of power over time since last reset.

http://www.p3international.com/products/special/P4400/P4400-CE.html

Another way to tell, sometimes I can hear mine making a sizzling sound.

At the beginning of the season the heater WILL raise your coolant temperature enough to be able to see it using the car's temperature gage. It was in the low 40's last night here, my heater was plugged in all night, and my needle came up to the first line above the bottom when I turned the key. Once it really starts to get cold it may not move when the key is turned on.

-Jim
__________________
1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.
Reply With Quote
  #10  
Old 10-19-2008, 09:50 PM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
BC is correct

Mr. Carlton,

4hrs total time with block heater plugged in 5PM to 9PM
Ambient 65F @ 75 percent humidity
110F measured with thermometer (small Chef's type) wedged between
crossover and valve cover.
43C As measured by 124.128's dash Temperature gauge.

(Bonus information for me:W124's dash gauge is accurate (at least at 110/43)
__________________
'84 300SD sold
124.128
Reply With Quote
  #11  
Old 10-19-2008, 09:55 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by compress ignite View Post
Mr. Carlton,

4hrs total time with block heater plugged in 5PM to 9PM
Ambient 65F @ 75 percent humidity
110F measured with thermometer (small Chef's type) wedged between
crossover and valve cover.
43C As measured by 124.128's dash Temperature gauge.

(Bonus information for me:W124's dash gauge is accurate (at least at 110/43)
As expected........just enough to allow the engine to start like it's summertime. It won't get that warm if the ambient is 0F. however.
Reply With Quote
  #12  
Old 10-19-2008, 10:14 PM
Registered User
 
Join Date: Mar 2006
Posts: 545
Canadian method

Plug it in when it's quiet around. You should hear a faint "singing" just like an electric kettle......
Reply With Quote
  #13  
Old 10-20-2008, 12:47 AM
Registered User
 
Join Date: Apr 2005
Posts: 88
Block Heater

My 79' 300SD doesnt have a block heater. How hard is it to install??
__________________
Mark

1979 300SD southern survivor (Old Yeller) 151K
1967 Cougar XR7 CA car (Precious) 88K
1967 Pontiac LeMans TX car (08' resto project) 72K
1995 F350 Powerstroke Dually from TX 139K
1996 Honda Accord (the winter beater) 134K
1994 Fleetwood Wilderness 30' fifth wheel
Reply With Quote
  #14  
Old 10-20-2008, 03:59 PM
Registered User
 
Join Date: Sep 2006
Location: MA
Posts: 522
Quote:
Originally Posted by compress ignite View Post
1. Plug in for 3-5 hours,get in MB, insert key, turn to "Run" ...Is engine at
operating temperature? If so it works.
2.More difficult...With DMM set to "Continuity Test" apply leads to poles of female block heater plug.[Then you can do #1 to double check]
Ohmmeter across the MALE block heater plug (review your birds and bees Compress!) Should read about 28 ohms.

Voltmeter/Ohmmeters are $2.99 on sale at Harbor Freight. Everyone should have one
__________________
Mark in MA
11 MB GL350 Bluetec 135k
05 MB E320CDI 351k Granite Grey Metallic
05 MB E320CDI 234k Black
05 MB E320CDI 176k Tectite Grey
99 Dodge 2500 Cummins 5sp 144k
83 MB 300SD 351k
62 Jeep CJ-6 120k
Reply With Quote
  #15  
Old 10-20-2008, 04:07 PM
ForcedInduction
Guest
 
Posts: n/a
Quote:
Originally Posted by compress ignite View Post
Is engine at
operating temperature? If so it works.
It won't be if its cold outside. The block heater is only around 400watts.
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 03:15 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page