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  #1  
Old 09-13-2013, 08:35 AM
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81 240 won't start when engines cold

Ok 81 240 hard to start when engine is cold. It's not even cold outside.


New glow plugs.
New starter

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  #2  
Old 09-13-2013, 09:00 AM
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start with a valve adjustment. then a compression test. DO NOT USE ETHER!!!
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  #3  
Old 09-13-2013, 09:58 AM
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Check the strip fuse in the GP Relay. Pull the cover and you will see it.

Was it starting ok and now a no start condition?


Mercedes Diesel Glow Plug Repair


Charlie
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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

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  #4  
Old 09-13-2013, 10:21 AM
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Are the glow plugs getting 12 volts with the key in the start position? Do you have series or parallel plugs?
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  #5  
Old 09-13-2013, 10:25 AM
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A busted 80 amp glow plug fuse was enough to strand me on a cool day. I walked to Canadian Tire and McGuyvered in an fuse.

Valve adjustments are critical on these cars. My 78 300D had none for 12 years before I got it. Having one done, it was like I got a new engine
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  #6  
Old 09-13-2013, 11:11 AM
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I'm getting power to all glow plugs. Just started this over night. Valves do need adjusting. I'm having trouble finding a .004 feeler my only goes to .008 and all at parts store go to .006
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  #7  
Old 09-13-2013, 11:12 AM
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Series pencil plugs
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  #8  
Old 09-13-2013, 11:12 AM
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When this condition occurs on indirect injection engines. Usually the first prime suspect is the glow plug system. Some indirect diesel engines do not like to start with even one glow plug bad.

I even had one oddball indirect injection diesel engine that still was fairly tight. It would not even light off hot without a little glow plug action first.
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  #9  
Old 09-13-2013, 11:15 AM
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Quote:
Originally Posted by Billydean View Post
Series pencil plugs
Something very odd there. Series are always loop plugs and pencil always parallel. That could the problem.
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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
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  #10  
Old 09-13-2013, 12:12 PM
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Huh. They each have there on wire going to them. Not looped together
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  #11  
Old 09-13-2013, 12:36 PM
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They're parallel then.
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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
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  #12  
Old 09-13-2013, 02:44 PM
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When you replaced the glow plugs, did you ream out the carbon?

Did you use Bosch plugs? Not autolite

When was the last time you replaced the fuel and air filters?

Ever clean the fuel tank?

Does it have the newer style primer pump?

I lost my .004 feeler gauge, when I do a valve adjustment....I use the .006 one.....I figured .002 over isn't enough to cause any issues....if the valve is tight using that gauge or to lose.....that can cause more of an issue......I would use the .006 and check your valves...
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  #13  
Old 09-13-2013, 03:20 PM
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I used the cheap auto lite plugs. I did ream the holes out
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  #14  
Old 09-13-2013, 03:32 PM
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If it just happened overnight, I doubt it's tight valves. More likely malfunctioning glow plugs or lack of fuel.
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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
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  #15  
Old 09-13-2013, 03:54 PM
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Get the feeler gauge set from Sears, it has the sizes you need.



Mercedes Diesel Valve Adjustment Procedure





Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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