Warming Up Engine??
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Super Member
Joined: Apr 2003
Posts: 507
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Warming Up Engine??
hi,
i was wondering if it's necessary to warm up the engine during:
1. start in the morning
2. after parked for few hours
if so, what gauge that I should refer to in order to confirm that the engine is ready..
PS: I've been just looking at the temp display and wait until it gets to 80F...
thanks
PS: btw, I have a 01 C320..
i was wondering if it's necessary to warm up the engine during:
1. start in the morning
2. after parked for few hours
if so, what gauge that I should refer to in order to confirm that the engine is ready..
PS: I've been just looking at the temp display and wait until it gets to 80F...
thanks
PS: btw, I have a 01 C320..
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,854
Likes: 197
From: Huntington Beach, Ca.
'17 Jaguar XF
"I've been just looking at the temp display and wait until it gets to 80F." That's the one you should be looking at, there is no other that I know of. Don't sit and let the engine 'warm up'. Drive the car to let the engine warm up. Just don't do any quick starts or depress the gas pedal too far.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,854
Likes: 197
From: Huntington Beach, Ca.
'17 Jaguar XF
"so i guess it's safe to drive around as soon as I start the engine and not wait and sit there till it's warm??"
Yes, not only safe but better for your engine.
"what did you refer to as 'quick starts'?"
Stomping on the gas pedal from a stop.
Yes, not only safe but better for your engine.
"what did you refer to as 'quick starts'?"
Stomping on the gas pedal from a stop.
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Member
Joined: May 2002
Posts: 235
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2002 ML55, 2006 C6 Z06
For all engines, it is generally accepted that you should not put heavy loads until the engine is up to normal operating temps. So you should not be doing full acceleration runs until the temps are up to be safe.
What will happen? You have all kinds of different metals inside your engines and they expand at different rates, if you do full blasts on a cold engine tolerances may not be "optimum" and you may effect engine longevity. If the engine is a very cold state then oil viscocity maybe effected, i.e. lack of proper bearing lubrication.
As for how soon you can drive after you start up, as soon as the engine develops full Oil Pressure (within a couple of seconds depending on oil viscosity and oil temp). But, light to moderate load until everything is heated up to optimum temps.
What happens if you don't follow the above? You may notice no difference on a fairly new engine ( less than 3 years) but as the engine ages oil consumption may steadily increase as will noise (internal rattle and vibration).
What will happen? You have all kinds of different metals inside your engines and they expand at different rates, if you do full blasts on a cold engine tolerances may not be "optimum" and you may effect engine longevity. If the engine is a very cold state then oil viscocity maybe effected, i.e. lack of proper bearing lubrication.
As for how soon you can drive after you start up, as soon as the engine develops full Oil Pressure (within a couple of seconds depending on oil viscosity and oil temp). But, light to moderate load until everything is heated up to optimum temps.
What happens if you don't follow the above? You may notice no difference on a fairly new engine ( less than 3 years) but as the engine ages oil consumption may steadily increase as will noise (internal rattle and vibration).
Last edited by RossN; Jun 29, 2003 at 03:51 PM.
MBWorld Fanatic!
Joined: Mar 2003
Posts: 5,546
Likes: 6
From: SFV, SoCal
2022 CLS450 AMG 4Matic
I usually wait until the engine slows down from the high idle upon cold starting. I am not too familiar with the mechanics of the MB engines but it's like when the choke is turned off. Once the engine starts to idle at the normal rate, that's when I drive off. It's usually I would say around 10-15 seconds...
MBWorld Fanatic!
Joined: Apr 2003
Posts: 4,781
Likes: 3
From: Boston
'05 A4 1.8TQM6
My advice is after starting the car (from overnight or a long period of no driving) is to let the RPM needle drop first. As you notice, when you first start up the engine, there is a "whine" and the RPM needle is above 1000RPM's. Usually let that drop to below 1000RPM's (about 30 seconds or so) then drive slowly till the oil temp guage is to about 80 or so...
My .02 cents
My .02 cents
