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Turbos and UOA #4635317
01/15/18 02:02 AM
01/15/18 02:02 AM
Joined: May 2012
Posts: 5,675
Fort Lauderdale, FL
DoubleWasp Offline OP
DoubleWasp  Offline OP
Joined: May 2012
Posts: 5,675
Fort Lauderdale, FL
Are turbochargers a factor in the wear metal results in a UOA, or are they just basically shedding so little (properly working) that it does not matter?


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Turbos and UOA [Re: DoubleWasp] #4635319
01/15/18 02:12 AM
01/15/18 02:12 AM
Joined: Dec 2016
Posts: 7,169
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 7,169
Waco, TX
Originally Posted By: DoubleWasp
Are turbochargers a factor in the wear metal results in a UOA, or are they just basically shedding so little (properly working) that it does not matter?


The bearings in a turbo are really small, and they can't wear very much at all before they are toast.

So, yes: "just shedding so little (properly working) that it does not matter?" is correct.

I have seen turbos with 5,000+ hours of operation show *NO* noticeable or measurable wear.
That's pretty good (assuming 5,000 x 60 mph = 300,000 miles equivalent)

Just today I talked to a trucker with a 2001 Freightliner with 1.6 million on the clock,
He says he replaced the original turbo at 1.2 million miles (60 Series Detroit)
100% Mobil Delvac 15W-40 it's entire life.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Turbos and UOA [Re: Linctex] #4635395
01/15/18 06:35 AM
01/15/18 06:35 AM
Joined: Aug 2017
Posts: 66
Mt. Vernon, NY
ssamaroo01 Offline
ssamaroo01  Offline
Joined: Aug 2017
Posts: 66
Mt. Vernon, NY
Originally Posted By: Linctex
Originally Posted By: DoubleWasp
Are turbochargers a factor in the wear metal results in a UOA, or are they just basically shedding so little (properly working) that it does not matter?


The bearings in a turbo are really small, and they can't wear very much at all before they are toast.

So, yes: "just shedding so little (properly working) that it does not matter?" is correct.

I have seen turbos with 5,000+ hours of operation show *NO* noticeable or measurable wear.
That's pretty good (assuming 5,000 x 60 mph = 300,000 miles equivalent)

Just today I talked to a trucker with a 2001 Freightliner with 1.6 million on the clock,
He says he replaced the original turbo at 1.2 million miles (60 Series Detroit)
100% Mobil Delvac 15W-40 it's entire life.



Are there major differences between diesel turbos and gas turbos? Many people seem to think that they will be the first thing to go on a turbo engine. I have always wondered how turbochargers on turbo diesels go much longer than gas turbos - I'm assuming that they do last longer since I do not hear complaints about diesels requiring turbocharger replacements.


2015 Fusion Titanium AWD 2.0L Ecoboost 110k
2012 Escape Limited 2.5L Duratec 43k
2000 E-250 4.2L 91k
MC FS W/ MC Filters
Re: Turbos and UOA [Re: DoubleWasp] #4635434
01/15/18 07:42 AM
01/15/18 07:42 AM
Joined: Dec 2017
Posts: 3,013
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 3,013
SE British Columbia, Canada
How long are the gas turbos surviving? Is 200,000 miles too much to ask?


If you want the job done right......do it yourself.
Re: Turbos and UOA [Re: DoubleWasp] #4635463
01/15/18 08:17 AM
01/15/18 08:17 AM
Joined: Dec 2013
Posts: 3,989
Manchester, England
Olas Offline
Olas  Offline
Joined: Dec 2013
Posts: 3,989
Manchester, England
A properly lubricated and cooled turbo will last just as long as any other bearing in the engine. Lifespan is compromised in several ways:
Low oil kills the bearing
Insufficient cooling lets the oil in the bearing coke after shutoff, next run sees oil starvation and kills the bearing
Improper oil choice promotes coking in the bearing
Remapping or chipping the ECU for more boost puts more heat into the bearing accelerating wear

There used to be a mantra in the early days of mass turbocharging, they said "spool, then cool" and saw good life.
People who are in a rush to go shopping/get home etc who cut the ignition as soon as they reach their destination without sitting idle for a while to let the turbo cool see one of the above listed problems.

Good maintenance and operating procedure is key to good longevity, and Id guess the big-mileage turbo diesels in America are truck drivers who know how to operate their machinery, where a lot of petrol turbos are consumer items driven by people who don't know or care (generalisation, I know you're not all like that)


Cable ties should hold it
Re: Turbos and UOA [Re: Olas] #4635478
01/15/18 08:27 AM
01/15/18 08:27 AM
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,198
Campbellsville, KY
Originally Posted By: Olas
Good maintenance and operating procedure is key to good longevity, and Id guess the big-mileage turbo diesels in America are truck drivers who know how to operate their machinery, where a lot of petrol turbos are consumer items driven by people who don't know or care (generalisation, I know you're not all like that)



This.


To quote a friend, "Synthetics, man."

'85 GMC C3500, 454, 132K
'82 Mercedes 300CD, OM617 turbo, 173K (totaled 2018, in rehab)
'85 Mercedes 300TD, OM617 turbo, 217K (wife's)
'67 Suburban, 350, 331K
Re: Turbos and UOA [Re: DoubleWasp] #4635572
01/15/18 09:52 AM
01/15/18 09:52 AM
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
Most over the rood big trucks are driven a a fairly constant speed. Their turbos are designed for high efficiency at a constant speed. The gas engine turbo is small to reduce speedup time for quick acceleration. I think that is why Diesel turbos last much longer than car turbos. ed


CX5 Touring 2.5L :-)
Re: Turbos and UOA [Re: DoubleWasp] #4635727
01/15/18 12:43 PM
01/15/18 12:43 PM
Joined: Dec 2017
Posts: 417
Massachusetts
VeryNoisyPoet Offline
VeryNoisyPoet  Offline
Joined: Dec 2017
Posts: 417
Massachusetts
Diesel engines also tend to run lower exhaust gas temperature compared to boosted petrol engines.

That said a modern turbo can last a long time with water cooling (most of them), quality oil, staying on top of OCI, and letting them idle to cool down after hard driving.

I'll be checking the bearings for play in the spring, but my car has the original turbo after 184k and it still works just fine. No noises, unusual oil consumption,or other common signs of impending failure.


1998 V70 GLT / 195k miles [10w-30 Valvoline Syn w/ Maxlife Tech + Mann W917 filter]

"Use yah blinkah!"

"Be nice. The alternative involves an air horn and 7000 lumens of high beam."
Re: Turbos and UOA [Re: VeryNoisyPoet] #4635846
01/15/18 02:42 PM
01/15/18 02:42 PM
Joined: Jul 2008
Posts: 1,114
British Columbia, Canada
ecotourist Online content
ecotourist  Online Content
Joined: Jul 2008
Posts: 1,114
British Columbia, Canada
Originally Posted By: VeryNoisyPoet
That said a modern turbo can last a long time with water cooling (most of them), quality oil, staying on top of OCI, and letting them idle to cool down after hard driving.

I'll be checking the bearings for play in the spring, but my car has the original turbo after 184k and it still works just fine. No noises, unusual oil consumption,or other common signs of impending failure.

It'll be fine. The oil cooled (only) turbo in my '86 Volvo 740 Turbo lasted a long time. Still going strong after 285,000 Km and 18 years. I then sold it to friends who drove it for 5 more years and the turbo was still fine.

Oil was not as good as today's (always conventional, often Pennzoil PZL Turbo) but changed every 3 months. And letting the turbo cool after hard driving.


2000 BMW 528i 5MT
2007 Honda Accord EX-L 4Door V6 6MT
Re: Turbos and UOA [Re: Eddie] #4636526
01/16/18 10:03 AM
01/16/18 10:03 AM
Joined: Oct 2014
Posts: 12,582
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,582
Idaho
Originally Posted By: Eddie
Most over the rood big trucks are driven a a fairly constant speed. Their turbos are designed for high efficiency at a constant speed. The gas engine turbo is small to reduce speedup time for quick acceleration. I think that is why Diesel turbos last much longer than car turbos. ed
I could easily get the turbo temps to the red line on the pyrometer on the class 8 trucks which was 1200*f .


2015 Ford F150 2.7
2018 Ford F350 6.2

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