I noticed this evening that as it was getting colder that my idle was getting higher. Is this some type of feature of 300D engine that I didnt know about?

anyways no big deal

check out tonites temps here http://www.theweathernetwork.com/weather/cities/can/pages/CAAB0103.htm

I got's to work in the morning ahhhhhhh

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1979 Mercedes 300D 265 000 miles
1969 Mercedes 230.6 164 000 km

I don't know what -30*C translates to off hand but I can tell you that is friggin cold and I wouldn't want to try it!

I wasn't aware that any of them did that, that is quite convienent as most idle to low when started which causes them to stall unless the driver holds their foot on the accelerator. I hope it doesn't try going over 1k rpms though, I heard that on some models that is where the IP doesn't try to regulate the motor from running away from itself.

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

-30C =

-22 Fahrenheit. WOW, THAT IS NUTS! Good luck tomorrow morning, like you said "AHHHH~"

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1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)

Well now that I know what the temperature is all I need to figure out is what would make a person willing to put up with that crap? This upcoming week will have single digit lows (*F) and I wonder why I still live here!

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

I'd be willing to bet that I'm the only one here who's jelous of those temps, and I mean it! I love cold and snow, that is, as long as the summer is warm. I woudn't want it to be cold all the time, but neither would I want it to be warm all the time. That's why I couldn't stand living in the south. Reno is alright.

Back to the topic, I always thought that MB diesels don't have any automatic idle adjustment. Mslipac, is your idle consistently higher when it's colder?

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

my idle adjust cable gets very stiff I think it shrinkes a bit in cold weather causing my high idle I found out today so I adjusted it some more and is all good now

I tell ya it was cold today had the benz plugged in all night and still took 6 glow cycles and 2 cranks to get her going

temp gauge couldnt reach 175'F in an hour of driving

damn

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1979 Mercedes 300D 265 000 miles
1969 Mercedes 230.6 164 000 km

That is a quite interesting cause of a problem, my solution wouldn't be to readjust it though. Oh no, what I'd do is move to some place warmer.

Wow you must go through glow plugs pretty quick, how can the battery even do that many cycles? You know that the glow plugs keep going like 45-60seconds after the light goes out right? I wonder if you made your own "encapsulation module" (insulation panel under the motor) if it'd start better. This way the only way for air to come in or heat to go out is through the front grill, it would have to help the block heater warm it up.

When it is below freezing out even though my thermostat is good my car doesn't get up to temperature very often because I like soaking that heat up, well that is until I get outside!

__________________
Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

mslipac, you do know that when you turn the idle adjust knob to increase idle speed, you have to press the throttle too, right? If you're not pressing the throttle, it'll feel very stiff.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

DieselAddict - I do all that the knob works fine but it doesnt releave tension of the cable all the way...this is what caused my high idle


and for glowplugs i knew they stay on for a while after light goes out but it's soooooooooo cold that the engine starts up on maybe 3 or 4 cylinders and starts slowly winding down untill she's dead again so usually on 2 or 3 crank I can get enough heat in to my cylinders that they all fire.

as soon as I got my car I changed my battery ( new mercedes batt ) nice white-one and all of my glowplugs

another thing I was wondering I dont know how smart is it to leave car idling for two hours + unattended ! let's say you go to movies or out for dinner and just let her run for that period of time.


thanks

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1979 Mercedes 300D 265 000 miles
1969 Mercedes 230.6 164 000 km

Do what i did. Put a valve between the shut-off vacuum line and the diaphram. When you park it, close the valve, take the key out, and lock the doors. It will still drive if someone breaks in but without the key, the steering wheel will be locked.

It might also be possible to put a homemade locking device on the parking brake pedal to keep it in place.

Originally posted by mslipac
"and for glowplugs i knew they stay on for a while after light goes out but it's soooooooooo cold that the engine starts up on maybe 3 or 4 cylinders and starts slowly winding down untill she's dead again so usually on 2 or 3 crank I can get enough heat in to my cylinders that they all fire."

mslipac
it sounds more like air in the fuel system. If it fires up there should be more heat in the cylinder from combustion than glow plugs.

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Brian

1995 E300 Diesel 124T - 210k

moleskin - this only happens in savere cold tho like -25'c and bellow so no big deal I know my fuel system is in top shape so no worries there...it's the cold that does that to it that's all

today I have made a grill cover out of some insulated cover material but I have placed it inside of the grill so it doesnt look so crapy if it was outside...what a difference it made for me I can get normal operating temp to the motor now that's sad guys I should move to somewhere warmer

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1979 Mercedes 300D 265 000 miles
1969 Mercedes 230.6 164 000 km

82-300td - that's a great idea but once I take the key out that shuts down all of my electrical system including much needed blower fan! and I am not sure if the charging system is routed throught the key as well it wouldnt charge the battery all that time

what I do it put a big old club on the wheel and lock it up



PS do you guys know how much does 300D non turbo engine consume of diesel fuel per hour of idling time



thanks

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1979 Mercedes 300D 265 000 miles
1969 Mercedes 230.6 164 000 km

Maybe a quart (about a liter) at idle, just a stab in the dark. Truly you aren't supposed to idle a motor that long, it is supposed to be an accelerated idle if you have to. I guess it is in case the injectors are dripping down the cylinder walls?!

__________________
Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

BoostnBenz - I idle my engine higher all the time to keep the oil pressure up and keep the engine warm...she cools off fast when idling

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1979 Mercedes 300D 265 000 miles
1969 Mercedes 230.6 164 000 km