MountainAir05
New Mexico
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Bruce Brown wrote:navegator wrote:One item that kills a turbo really fast is driving down the interstate at full speed and getting off to get fuel, coming in to the gas station and shutting down the engine.
This simple little action is detrimental to the life of the turbo, while the engine is running the oil is circulating to the turbo and lubricating the bearings and cooling, shutting the engine down shuts the flow of oil, this oil not only helps lubricate the bearings it also helps with cooling the unit.
When the flow of oil is interrupted the residual oil begins to cook and slowly starts to block the passages and also starts to destroy the bearings.
Depending on the turbo, it will spin at about 17,000 RPM at idle and anywhere up to 150,000 RPM's running down the road.
Try to avoid this by letting the engine idle 2 to 3 minutes or more before shutting down, this helps the turbo slow down to near idle speeds and helps cool the unit a bit, this prolongs the life of the turbo.
I do not know if they still manufacture them or not, it is an electric motor 12vdc and a pump coupled with a timer that runs for about 3 minutes at engine shut down and pumps oil to the turbo after the engine is shut down, totally separate from the engine, runs from the engine sump to the oil line for the turbo, the oil then drains to the engine pan this helps cool down the hot end of the turbo while it spools down and prolongs it's life.
navegator
This - 100%, every time.
Plus very good oil and change out every 7000 miles. We don't put the miles on like a OTR truck does or we don't. Its get new oil when it put to bed and then 6 months later after we start using it again another oil change. I do have the oil check every year and so far that has worked out.
* This post was
edited 04/28/21 07:57am by MountainAir05 *
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navegator
San Diego CA.
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I got in the internet and found 2 sites that are worth looking into, the first one is really good in explaining the different pumps and their pitfalls really worth reading, the second one is good to.
Hope this helps a little
www.rbracing-rsr,com/oilsystems.htm
www.team-bhp.com/tech-stuff/idling-rule-turbo
navegator
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wolfe10
Texas
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HHg in Austin wrote:Maybe someone can impart a little wisdom.....I have a Tiffin Phaeton (only 37,000 miles) with the 8.3 ISB, with 380 HP and 1250 foot pounds of torque.
Just a quick correction-- the Cummins 8.3 liter is the C engine-- depending on year it would therefore be the ISC.
Brett Wolfe
Ex: 2003 Alpine 38'FDDS
Ex: 1997 Safari 35'
Ex: 1993 Foretravel U240
Diesel RV Club:http://www.dieselrvclub.org/
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HHg in Austin
Austin, Texas
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wolfe10 wrote:HHg in Austin wrote:Maybe someone can impart a little wisdom.....I have a Tiffin Phaeton (only 37,000 miles) with the 8.3 ISB, with 380 HP and 1250 foot pounds of torque.
Just a quick correction-- the Cummins 8.3 liter is the C engine-- depending on year it would therefore be the ISC.
You are absolutely correct, you win the gold star for the day !! Thanks for the correction….
HHg in Austin
2013 Tiffin Phaeton 40-QBH
2018 Chevrolet Tahoe Toad
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HHg in Austin
Austin, Texas
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navegator wrote:I got in the internet and found 2 sites that are worth looking into, the first one is really good in explaining the different pumps and their pitfalls really worth reading, the second one is good to.
Hope this helps a little
www.rbracing-rsr,com/oilsystems.htm
www.team-bhp.com/tech-stuff/idling-rule-turbo
navegator l
Thanks!! I will read them…..the URL’s make it easy !
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Edd505
Elephant Butte, NM
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navegator wrote:One item that kills a turbo really fast is driving down the interstate at full speed and getting off to get fuel, coming in to the gas station and shutting down the engine.
This simple little action is detrimental to the life of the turbo, while the engine is running the oil is circulating to the turbo and lubricating the bearings and cooling, shutting the engine down shuts the flow of oil, this oil not only helps lubricate the bearings it also helps with cooling the unit.
When the flow of oil is interrupted the residual oil begins to cook and slowly starts to block the passages and also starts to destroy the bearings.
Depending on the turbo, it will spin at about 17,000 RPM at idle and anywhere up to 150,000 RPM's running down the road.
Try to avoid this by letting the engine idle 2 to 3 minutes or more before shutting down, this helps the turbo slow down to near idle speeds and helps cool the unit a bit, this prolongs the life of the turbo.
I do not know if they still manufacture them or not, it is an electric motor 12vdc and a pump coupled with a timer that runs for about 3 minutes at engine shut down and pumps oil to the turbo after the engine is shut down, totally separate from the engine, runs from the engine sump to the oil line for the turbo, the oil then drains to the engine pan this helps cool down the hot end of the turbo while it spools down and prolongs it's life.
navegator
![[image]](https://i.imgur.com/jO6Ca5Vl.jpg) Detroit but yes, I still do with my F350.
2015 F350 FX4 SRW 6.7 Crew, longbed - 2017 Durango Gold 353RKT
2006 F350 SRW 6.0 crew longbed sold
2000 F250 SRW 7.3 extended longbed airbags sold
2001 Western Star 4900EX sold
Jayco Eagle 30.5BHLT sold, Layton 24.5LT sold
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down home
south
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Won't pretend to know what killed your turbo: defective part, sand from engine casting coming loose bad oil flow, overheating?
Overheating is common as another poster said shutting off,without letting the turbo cool a bit.
California and some other places won't let you idle more than five minutes, which is perhaps enough if you slow down into truck stop ro wherever. They demand and some say you don't need to let it idle but I doubt they have any experience with one. Our Cat manual explicitly suggested or said to let the engine idle for about 5 minutes I think.
We recently sold it so I don't have the manual to quote from.
I always thought turbos could use an extra oil cooler on the pressure line. Ours was 16 years old when we sold it,still dong fine.They make better than OEM turbos but they cost more.
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Bruce Brown
Northern NY
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Just a side note on turbo heat; this is from my snowmobile. I took this picture sitting in my driveway after coming home from a ride this winter. Needless to say I always let it idle for a few minutes before shutting it down.
Yes this is a much smaller turbo and at a speed of 200,000 RPM it's a little faster than the Cummins turbo but the point is the same - turbos make a LOT of heat and they need time to cool down. And yes, this is normal for this engine.
![[image]](https://i.imgur.com/jGucjSQ.jpg)
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910
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HHg in Austin
Austin, Texas
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Thanks to all who responded, I’ve learned a few things, hopefully others reading this thread did too so they won’t repeat bad habits. Thanks again !
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Jarlaxle
New England
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wolfe10 wrote:HHg in Austin wrote:Maybe someone can impart a little wisdom.....I have a Tiffin Phaeton (only 37,000 miles) with the 8.3 ISB, with 380 HP and 1250 foot pounds of torque.
Just a quick correction-- the Cummins 8.3 liter is the C engine-- depending on year it would therefore be the ISC.
I thought the ISC went to 8.9 litres and was rebranded the ISL9 for 2007 and simply the L9 for 2017. (Though called that, it is a stroked ISC and shares nothing with the L-series engines.)
John and Elizabeth (Liz), with Briza the size XL tabby
St. Bernard Marm, cats Vierna and Maya...RIP. ">
Current rig:
1992 International Genesis school bus conversion
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