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 01-22-2013, 10:38 AM
Registered User
 
Join Date: Feb 2008
Posts: 59
1985 300D Difficulty Starting (COLD Weather)

I have 341,000 on my 85 300D. It got to about 28 F here for the past 2 mornings. I almost could not get the car started and am afraid of low compression. I have listed below what I did/have done. Another important question is should I be expected to use the block heater when the temperature gets this cold and this many miles on a turbodiesel engine?

1. Valves adjusted 8,000 miles ago.
2. New battery 2 weeks ago
3. Pre-glow through 3 cycles (until the relay clicks off before trying to start).
4. Hold the accelerator completely to the floorboard while cranking.

Any suggestions greatly appreciated!

Richard
Reply With Quote
  #2  
Old 01-22-2013, 10:51 AM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,020
Have you actually checked the glow plugs to see if they are all working?

It probably would not hurt to use the block heater at temperatures. I have not plugged my 91 300D in, it started this morning at 8F without incident.

Its entirely likely that you have one or more glow plugs dead/not working.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

82 300SD 145k
82 300SD 265k
87 420SEL 230k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
Reply With Quote
  #3  
Old 01-22-2013, 12:38 PM
Registered User
 
Join Date: Jul 2007
Location: Southern NH
Posts: 183
Quote:
Originally Posted by xke190sl View Post
4. Hold the accelerator completely to the floorboard while cranking.
Have you tried cranking without touching the pedal? I know it's contrary to the procedure in the manual, but I find my car starts at low temps better if I leave the pedal alone, at least until it starts running--then it helps to up the RPMs just slightly until it smoothes out.

But JamesDean is right about the glow plugs. I put a new set of Bosch Duraterms in this past fall and the difference is huge.
Mercedes Diesel Glow Plug Repair
__________________
05 E320 CDI - 140K miles
82 300D - 200K miles (sold)
Reply With Quote
  #4  
Old 01-22-2013, 06:03 PM
Graham's Avatar
Registered User
 
Join Date: Nov 2004
Location: Ontario, Canada
Posts: 3,409
Quote:
Originally Posted by xke190sl View Post
I have 341,000 on my 85 300D. It got to about 28 F here for the past 2 mornings. I almost could not get the car started and am afraid of low compression. I have listed below what I did/have done. Another important question is should I be expected to use the block heater when the temperature gets this cold and this many miles on a turbodiesel engine?

1. Valves adjusted 8,000 miles ago.
2. New battery 2 weeks ago
3. Pre-glow through 3 cycles (until the relay clicks off before trying to start).
4. Hold the accelerator completely to the floorboard while cranking.

Any suggestions greatly appreciated!

Richard
I live in Canada, and often have to start car in much lower temperatures than that.

If car is in a garage, as mine usually is, it will start without block heater at 28F. If outdoors it seems engine gets colder and battery output is lower. then block heater is needed.

Essentials:
- Good compression
- Properly adjusted valves (I once had shop do them and they had them all wrong)
- Properly working glow plugs. May need to ream out pre-chambers
- Good fuel.
__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5
Reply With Quote
  #5  
Old 01-22-2013, 06:17 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
If you wait until the relay clicks off, the glow plugs will not be energized when you turn the key to the start position. You should move the key to 'start' before the relay kicks off so that the plugs are on while the engine is turning over.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #6  
Old 01-22-2013, 09:07 PM
Zacharias's Avatar
Not so amused
 
Join Date: Apr 2010
Location: West Quebec
Posts: 4,025
Quote:
Originally Posted by xke190sl View Post
I have 341,000 on my 85 300D.

1. Valves adjusted 8,000 miles ago.
2. New battery 2 weeks ago
3. Pre-glow through 3 cycles (until the relay clicks off before trying to start).
4. Hold the accelerator completely to the floorboard while cranking.
You don't mention the age of the glow plugs. If you are glowing multiple times and it barely starts, I think you either have weak glow from old GPs, or at least two not working at all. As long as the #1 plug is working, the glow light will show on the dash. That doesn't mean you have adequate heat.

My experience has been that here in cold eastern Canada, valve adjustment issues often show up before the temp you describe. As Graham pointed out, around here 28 F (-2 C) is hardly even a cold day at this time of year. The motor would have to have very low compression figures to refuse to start at that temp. (I know -- I drove a high-miler 300sd with a pooched motor through one winter.)

Tonight in my area we are going down to -31 C (-24 F) and the windchill factor will be -42 F.
__________________


Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
Reply With Quote
  #7  
Old 01-23-2013, 08:28 AM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
As mentioned, good glow plugs are a must.

Synthetic oil too.
__________________
83 SD

84 CD
Reply With Quote
  #8  
Old 01-23-2013, 01:25 PM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
And a good starter!
__________________
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 01:21 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