Query on diesel engine

[Shutterbug]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

[Archerfish]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

Yes, this is very helpful. Thanks for the guy who started this topic, our experts here posted useful information and discussed a few things.

I also have the same question about older diesel engines.

[jick.cejoco]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

No need to waste fuel, start and drive specially hybrids or electric cars. Oils, fuel, engine metals, engine controls have been improved, reformulated and re-engineered a couple of times since then.

[12vdc]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

Old and new same principle of lubrication and combustion. At idling the oil pump delivers the oil from sump to the journals, galleries, no need to rev up. Some oil on top of the engine are retained after shutoff because of anti-drain-back-valve built-in the oil filter, this helps in faster lubrication on cold startups. Oil pressure in action can be seen after startup as the oil pressure indicator in the dash extinguish in less than 2 secs.

Just start the cold engine, drive slowly maintaining low RPM until you reach operating temp.

[Vodka]

Just start the cold engine, drive slowly maintaining low RPM until you reach operating temp.

i don't think maintaining low RPM is a good idea during warm up. someone posted about this like in the previous page.

[DiliKoAmericano]

i don't think maintaining low RPM is a good idea during warm up. someone posted about this like in the previous page.

I think what he means is dont use high rpms. And this is good avdvice. But yea u certainly dont wanna go the other extreme and change gears earlier than usual. U should drive normally, changing gears at the same rpm as u normally would, but using about 3/4 of the power you normally would, so a bit slower acceleration to the upshift point, until the engine is somewhere inside operating temp range.
Perhaps what these tossers should be saying when they sell the vehicles, is actually yo idle the engine for aminute before shutdown, as all diesels all have turbos now amd turbos need some nice cool oil flow to cool down so the hot oil doesnt sit in the stationary hot turbo and heat up to the point it breaks down.

[makelovenotwar]

How low is low RPM for the usual 2.5L - 3.0L diesel engines?
Less than 2k rpm?

[monty_GTV]

How low is low RPM for the usual 2.5L - 3.0L diesel engines?
Less than 2k rpm?

around 650-900 rpm. it fluctuates as the AC thermostat switches

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[makelovenotwar]

around 650-900 rpm. it fluctuates as the AC thermostat switches

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Oh, that's difficult to maintain while driving for me.
I live along the national hi-way so i'll be a nuisance if I drive with that rpm.

[monty_GTV]

Oh, that's difficult to maintain while driving for me.
I live along the national hi-way so i'll be a nuisance if I drive with that rpm.

i taught you are asking kapag naka idle.

while driving, less than 2k rpm cruising at 80kph

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