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#1
11-22-2005, 06:14 AM
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Old Diesel warmup time
What would be, from your experience, the best way to start and idle your Diesel engine to warm-up before leaving?
This is my first winter with my 300TD '79 Estate (617.912 engine) and it seems that now I have to press the acceleration pedal before turning the key to start when the engine is cold. I remember that VW recommended a time from 2-3 minutes of warmup idling for their diesel engines before leaving but I need to know what's best for a Mercedes Diesel which acts and feels pretty much different from it's VW counterparts. 
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#2
11-22-2005, 06:26 AM
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I usually go by the temperature.
The colder the temperature, the lower the warmup time and visa-versa.Although I am not always exact I find my 'rule of thumb' is to let it warm up for five minutes when it is 0 C and roughly an additional minute for every degree colder.
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#3
11-22-2005, 06:38 AM
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I really don't run mine in the cold or snow but when it is chilly outside I usually let it idle for as long as possible. If the block heater is needed and it is your main winter ride I would let it idle for at least 3-5 minutes.
__________________
'85 300SD (formerly california emissions) '08 Chevy Tahoe '93 Ducati 900 SS '79 Kawasaki KZ 650 '86 Kawasaki KX 250 '88 Kawasaki KDX200 '71 Hodaka Ace 100 '72 Triumph T100R
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#4
11-22-2005, 08:21 AM
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i usually
glow, start, fasten belt, go. if it is really cold i wait 30 seconds or a minute. then no full throttle right away.
tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#5
11-22-2005, 08:35 AM
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That's how I wrecked my previous car - a VW Golf II TD. After 3-5 months it developed all sort of odd problems like refusing to start easy when hot (damaged piston ring), bad injectors (it sounded like a T34 after every long 500Km+ road) and so on.
The Mercedes only stumbles and clatters like hell when cold. I only go faster when I start it in a supermarket parking and I have space to run it around for a few minutes before going for the main road. It has a pretty steep exit and I don't dare to attack it with a cold engine anyway. The problem with starting right away is that no one is willing to wait for you to warmup your engine in traffic, especially during rush hours. Sometimes you have to rev it within as little as 2 minutes from starting.
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#6
11-22-2005, 08:42 AM
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Whn I lived up North I warmed up until I saw the temp needle begin to move. After while you get a feel for how long it will take for varying temperatures.
Remember, heating the engine doesn't warm up the transmission. The best way to warm up a car is to drive moderately until the temperature get's up to near normal. Danny
__________________
1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination
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