Engine/Transmission (1994 - 1998) Idle question

[Mbalice]

Will an idle speed below the recommendation 750-800 hurt anything within the motor?



Currently the tach (which I know could be off a little) reads 500ish when warm and even a little lower at start up or with the AC on. But I don't have a stalling problem and I just "tap" the pedal to get her started.....







Thanks

Mike

 

[Joe G.]

It won't hurt the engine. It might get kind of aggravating if it decides to stall once in a while.

 

[Vaughn MacKenzie]

The only potential issue is letting it idle for an extended amount of time in cold weather. . . it'll likely cool down faster than if it was at normal idle RPM.

 

[DonTX]

Don't know if it has an affect on the 5. 9 Cummins, but on some diesels an idle speed below specs causes a twisting on the crankshaft from the firing cycles that will break it in two. .

 

[Skydiver]

Oil pump also be running slower. Main beaings need to float in oil.