Jump to content

Engine/idle hours

willsep
 Share

Recommended Posts

willsep Enthusiast

willsep

Posted
Posted

Are idle hours included in engine total hours?

I have total of 867.6 and Idle 123.2, does this make it 990.8 total engine hrs? or is the total 867.6 which include the idle hours?

5532D25A-B2E7-4E04-83DB-BD56BCD12756.jpeg

redwngr Senior Enthusiast

redwngr

Posted
Posted

If you sit in the truck and let it idle for 6 minutes (0.1 hours) you'll know for sure.

 

I expect the total to include idling -- but haven't done the 6 minute thing while the hours page was displayed.

gemarsh Senior Enthusiast

gemarsh

Posted
Posted

And just how do you get Idle Hours to display? 

 

I only see Hours. Doesn't list total or idle.

Z45 Senior Enthusiast

Z45

Posted
Posted

Total means ALL hours....

 

You have roughly 4,500 more mile on the engine than the odometer shows.

gemarsh Senior Enthusiast

gemarsh

Posted
Posted
1 hour ago, willsep said:

In the DIC Information screen scroll down until you see Engine and Idle hours

It must be a Chevy or Denali thing. On a '21 1500 and a '22 3500 GMC's Denali screen, it just shows a engine icon and hours...

 

20220127_072821.thumb.jpg.906aca0cb83b9fca767042955c0ead83.jpg

bdallas Enthusiast

bdallas

Posted
Posted
7 hours ago, gemarsh said:

It must be a Chevy or Denali thing. On a '21 1500 and a '22 3500 GMC's Denali screen, it just shows a engine icon and hours...

 

20220127_072821.thumb.jpg.906aca0cb83b9fca767042955c0ead83.jpg

I don't have the Idle hours either... 21 Silverado RST

willsep Enthusiast

willsep

Posted
  • Author
Posted

My is 2020 Sierra 1500 3.0 diesel. And just a quick question to elcamino, How did you figure 4500 extra miles? I am just curious, thanks.

redwngr Senior Enthusiast

redwngr

Posted
Posted (edited)
2 hours ago, willsep said:

My is 2020 Sierra 1500 3.0 diesel. And just a quick question to elcamino, How did you figure 4500 extra miles? I am just curious, thanks.

Lots of machines get maintenance done based on hours -- even though miles is more common on road vehicles. 

 

Anyway, it's sometimes useful to compare the methods. 

 

 

Your truck has 32,264 miles.

Since both hourmeters are available, we know that driving time is  868 - 123 = 745 hours.

Avg miles per hour = 32264 / 745 = 43.3 mpg

 

If the idling time was at the same rate -- 43.3 x 123 = 5326 additional miles. 

 

el camino calculated using total hours, so used  32264 / 868 = 37 mph

37 miles/hour  x 123 hour = 4570 miles 

(and of course, if total is the only thing that is available -- then we use total mile / total time )

 

 

Of course, we all realize that there has to be some idling time (-warm-up, stop lights, etc etc) and that all driving is not at freeway speed. 

Leads us to what is the 'normal' average vehicle speed.  

For some reason I seem to think that typical average speed (base on total hours) is somewhere in the mid 30's.

 

If the total hours is the only thing that is available -- then then our only option is to compare the average speed with typical  average speeds for the same vehicle type.  Imperfect method, but can give a little insight into how it is being used.

 

The was a bulletin or info sheet or tech sheet gm put out that did give an average speed to use with the idling hours - to add to odo miles for service purposes.  It also said that for warranty odo mileage should still be used.

 

 

 

an example:

The forklift has 6500 hours -- how does that compare to my pickup?

6,500 hr x 37 mile/hr = 240,500 miles 

Edited by redwngr
willsep Enthusiast

willsep

Posted
  • Author
Posted

Thanks redwngr, that was a great explanation, and I really appreciate your knowledge and time on the issue.

newdude Senior Enthusiast

newdude

Posted
Posted
On 1/25/2022 at 4:14 PM, willsep said:

Are idle hours included in engine total hours?

I have total of 867.6 and Idle 123.2, does this make it 990.8 total engine hrs? or is the total 867.6 which include the idle hours?

 

 

 

Total is total.  Of the 867.6hrs, 123.2 of those has been idling.

 

GM's calculation (formula applies to gas and diesel):  The Diesel Exhaust System and DPF Soot Accumulation – TechLink (gm-techlink.com)

 

"Vehicle Idling

Some vehicles may spend a lot of time idling. Use the following steps to aid in determining the equivalent mileage (kilometers):

Record the total engine hours indicated on the DIC.

Multiply the engine hours by 33 miles or 53 km. This represents an average speed of 33 MPH or 53 KM/H.

The result should be close to or lower than the mileage on the odometer.

For example, if a vehicle has 1812.3 engine hours and 60,837 miles (97,908 km) on the odometer, the engine run time would equate to about 59,806 miles (96,052 km) (1812.3 X 33 = 59,806) (1812.3 X 53 = 96,052).

Since the calculated mileage is less than the actual mileage, the vehicle does not spend an excessive amount of time idling.

If the calculated mileage is more than the actual mileage, the vehicle would be considered a vehicle that idles a lot and this information may be useful in diagnosing any issues."

 

867.6hrs x 33mph = 28,630.8mi.  Per your odometer at 32264mi, Your truck has "traveled" 3,633.2mi more than the engine has physically been running.

 

If you applied this formula to your idle hours, 123.2hrs x 33mph, your engine has had 4065.6mi worth of idling on it, therefore 24,565.2mi of driving time, totaling 28630.8mi.

 

So you'd be a low idler.  

willsep Enthusiast

willsep

Posted
  • Author
Posted

Thanks newdude, that’s really good information. I really appreciate all the knowledge from ya’ll.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • DaleB
      No Software Updates - Old Build

      By DaleB · Posted

      Thanks, all. It sounds like keeping the software "as is" is the best course of action.
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      https://en.wikipedia.org/wiki/Overengineering   Excerpt from the above link: (BTW the above is a 90 second read)   [Quote]   A story about very precise engineering is given in the 1858 story The Deacon's Masterpiece or, the Wonderful "One-hoss Shay": A Logical Story by Oliver Wendell Holmes Sr., which tells of a carriage (one-horse shay) Because it had been engineered so that no single piece failed first – no piece was over-engineered relative to the others, and they thus all collapsed at the same time. A similar quote by Ferdinand Porsche claimed "the perfect race car crosses the finish line in first place and immediately falls into pieces."[5]   [End Quote}   By Engineering's  own definition then; the AFM and Torque Converters, 4-5-6 clutch assembly of the 6L80E, and a dozen other common chronic parts and systems failures are "UNDER ENGINEERED". And by their own definition done so with INTENT. Ya can't have it both ways OEM's.     
    • Spendit
      Installing tow mirrors

      By Spendit · Posted

      Everything you need to know..... https://www.gm-trucks.com/forums/topic/198157-2014-2017-dl8-dl3-towing-mirror-upgrade-–-mirrors-explained/
    • Gangly
      Broke Down on the Mountain

      By Gangly · Posted

      I was in Utah this week attempting a bow hunt in the Wasatch mountains with friends.  On the evening of the first hunt, making my way across a ridge to a friends camp, the upper control arm on the driver's side separated, the CV axle got trashed, and the wheel was dang near at a 45 degree angle to the ground.  I was able to get it towed off the mountain and into town about 3:00 am, and spent the remainder of the night in an O'Reilly's parking lot.  Luckily, there was a Chevrolet dealership not to far away so I was able to get to the dealership and pick up a new CV and UCA.  It would have been a few days before they could have gotten to the truck and I brought tools with me on hunt since it was a two day drive to get there, so I did the repairs myself in the O'Reilly's parking lot.      What's interesting is that the UCA ball joint didn't break, it just popped out of the bottom of the UCA.  There was VERY LITTLE evidence of grease on the ball joint or in the socket, and you could see where the ball joint had warbled out part of the socket over time.  I guess that's what happens over 186K miles of use :)   Big Kudos to O'Reilly's for letting me work on the truck in their parking lot.  However, they made a $150+ off of me from the purchase of various tools, so I guess it was in their best interest anyways :)   Getting towed off the mountain.   UCA Ball Joint Socket   Trashed CV   Suspension disconnected and UCA and CV Removed   New UCA and CV installed with the suspension buttoned up.    
    • KARNUT
      What did you do to your "other" car (aka musclecar) today

      By KARNUT · Posted

      My family still laughs at me when they see me drive up in the minivan. Same with less than a V-8 truck. It helps that I have choices. I don’t think I could only have a minivan as the one and only vehicle as much as I like it. And I wouldn’t pass up a good buy on an older V-8 reg cab GM truck. Could you live Raven as the only ride?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...