Do Turbo models require longer warm-up time?

Post by **prwood** » 07 Jul 2017, 13:50

I was reading this site: http://www.turborepair.com/index.php?op ... Itemid=154

It says:

When your engine is first started, there is a very slight delay until the oil being pumped from the engine's oil pan reaches the turbocharger. In that amount of time, the turbocharger is already spinning many times faster than the engine. We know that the oil is the only lubricant for the turbo, so it is very important that it is being delivered quickly and efficiently to keep from damaging the bearings in the turbocharger. In this critical time, it is best to allow the car to idle for at least 3-5 minutes before driving off for the first time that day. Afterwards, if the car is left sitting for less than 3 hours it is OK to reduce this idle time down to around a minute.

I don't know how credible the site is, but is this good advice? Because I'm generally in the start-the-engine-and-drive camp...

Post by **vtl** » 07 Jul 2017, 14:05

Always wait until RPM drop to like 1000.

Post by **jonesg** » 07 Jul 2017, 16:11

Warm up for 3-5 minutes ?
All I can say, its not gonna happen with me.
I let the rpm drop to 650 and I'm off to work.

If you're pulling the turbo yourself you might as well install the new innards, took me no time,
getting it off the engine was the biggest part. You can buy new cartridge all balanced with new shaft and wheels fully assembled for less than $180. Removing the old cartridge only involves a large circlip and its out.

Post by **abscate** » 07 Jul 2017, 17:19

It's a classic case of the Internet being a way to disseminate bad information very efficiently.

See your owners manual on how to start and operate your car.

I start, buckle up, check mirrors, turn radio from Taylor Swift, drive

Post by **mrbrian200** » 07 Jul 2017, 17:29

prwood wrote: ↑07 Jul 2017, 13:50 I was reading this site: http://www.turborepair.com/index.php?op ... Itemid=154

It says:

When your engine is first started, there is a very slight delay until the oil being pumped from the engine's oil pan reaches the turbocharger. In that amount of time, the turbocharger is already spinning many times faster than the engine. We know that the oil is the only lubricant for the turbo, so it is very important that it is being delivered quickly and efficiently to keep from damaging the bearings in the turbocharger. In this critical time, it is best to allow the car to idle for at least 3-5 minutes before driving off for the first time that day. Afterwards, if the car is left sitting for less than 3 hours it is OK to reduce this idle time down to around a minute.
I don't know how credible the site is, but is this good advice? Because I'm generally in the start-the-engine-and-drive camp...

That advice that would have applied to engines/turbos/oils from before about 1980... and they're still saying it...no not very credible.

Post by **precopster** » 07 Jul 2017, 17:35

Lately on really cold mornings been getting some coughing on startup but once cobwebs are cleared my T5 is in D and on the way.

The oil system is fully pressurised within a couple of seconds after startup. Dropping revs to idle for 30 secs after a hard run is good sense.

Post by **tryingbe** » 07 Jul 2017, 17:36

LOL.

Oil pump is driven by the crankshaft, and oil is pump thru the entire within milliseconds of engine being started. You can drive it right after, just don't redline the engine or go full boost yet. Wait until after the engine is warmed, then go full throttle.

Post by **mrbrian200** » 07 Jul 2017, 19:35

precopster wrote: ↑07 Jul 2017, 17:35 Lately on really cold mornings been getting some coughing on startup but once cobwebs are cleared my T5 is in D and on the way.

The oil system is fully pressurised within a couple of seconds after startup. Dropping revs to idle for 30 secs after a hard run is good sense.

Unlikely the turbo would be causing that.

Post by **precopster** » 07 Jul 2017, 21:40

mrbrian200 wrote: ↑07 Jul 2017, 19:35
precopster wrote: ↑07 Jul 2017, 17:35 Lately on really cold mornings been getting some coughing on startup but once cobwebs are cleared my T5 is in D and on the way.

The oil system is fully pressurised within a couple of seconds after startup. Dropping revs to idle for 30 secs after a hard run is good sense.
Unlikely the turbo would be causing that.

It was a comment and I wasn't blaming any particular component though in the context of this conversation I can see how my intent could be mist-rued. Anything constructive would be useful. I find Taylor Swift soothes my engine

.

Good engine builders pump oil into galleries of the crank using a home made pump setup as well as some assembly lube on the bearing shells. In fact if you disassemble any turbo shaft you will find blue areas where lube has been lacking. It may not result in failure but shows where hot spots have occurred due to either poor oil circulation/pressure or overheating due to racing the engine. In white blocks where sump O rings are cracked there is less than ideal oil pressure so much so that lifters become noisy in pre-2000 engines.

thebull · Post by **thebull** » 07 Jul 2017, 22:22

In this critical time, it is best to allow the car to idle for at least 3-5 minutes before driving off for the first time that day.

Typical scare tactics. These "advises" are there more or less to make you believe there is something wrong with your turbo (in this case) because you did not do this or that. On heavy machinery, boat engines (Volvo Penta) I would agree with this statement.

Now, with 2.5L T5 engine oil is at the turbo in worst case scenario (car seating for couple of days) for less than 2 seconds. The feeding line is connected directly with the oil pump. With a car driven recently the oil is there as soon as you turn the starter. The pressure is high enough that if this oil line brake the all of it will be out for lets say less than 15 seconds. Meanwhile the car will be most probably on fire due to exhaust pipe right there.

If you want to ruin your turbine than do this:
- don`t wait for car to warm up and use your turbo - drive like a crazy.
- after freeway driving turn of your engine immediately and do not wait 3-4 minutes to cool down the turbine.
- use mineral oil and change it once every 5-7000 miles instead good synthetic every 5000
- use questionable oil filters like orange death one (fram), not genuine, man or mahle
- do not maintain your crankcase vent system. Lots of info how to service this one.
In this way turbine will go first. Than the engine.

I thing the statement:

I let the rpm drop to 650 and I'm off to work.

is a very good advice. That is exactly what i am doing. Thanks jonesg.