Turtle n Peeps wrote:
That's fine.
You sort of made my point though. I've ran my SBC and my 6.5 right at 1,500 (and above for short periods) degrees many, many, many times. No damage what so ever. Both of these engines do not have piston squirters. Engines with piston squirtes can go much higher EGT without damage.
You will not cook a 7.3 or a 6.5 with stock fuel and timing settings.
As you know, modern diesels have safeties in place to prevent any problems. They will defuel before damage occurs.
These are all for stock settings. That's why I said my answer would be different if the engine was tuned.
Yes, you can cook a stock 7.3L or 6.5L with stock settings if something is wrong like a bad injector. Just a simple Google search will pull up many stock trucks like the link below with cracked pistons or melted pistons.
piston burn cause? picsThat is the point of gauges, to alert you when something is wrong so you can either alter what your are doing to bring the temps down to a normal level or shut the engine down before it becomes an even bigger issue that would require a full engine replacement. This is why things like EGT or engine coolant temp gauges are good to have even on stock vehicles because things like injectors or water pumps do go bad without you knowing it especially on older vehicles.
Also, how hot is too hot varies from engine to engine. Some engines like the 5.9L were fine up to 1,400F while others like the 7.3L(especially the 2000-2003 7.3L with the weaker rods) would be less. The 6.7L Cummins on the other hand seems to be fine up to the 1,500F range for short periods.
