I was going downhill last week on 5th gear . Rpm was above 36000
Multiple codes showed up including
Stop engine light.
It has been few days in freightliner.
Could the damage be severe???
Thanks
Engine damage with high rpm
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Aqel1982, Oct 19, 2018.
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Rideandrepair and Crude Truckin' Thank this.
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If it ran 36000 rpm do whatever you can to keep that motor.
Super_Trucker, not4hire, RSB34 and 11 others Thank this. -
Most semi engines don't like being rev'd over 22-2400, with 4 valves per cylinder, they tend to float the valves and/or break connecting rods. Smaller diesels like in pickups and passenger cars can handle it, but big displacement diesels tend to come apart...in fact, an over rev like that may have voided the engine warranty.
bzinger, Rideandrepair and Crude Truckin' Thank this. -
Let's just say, you definitely didnt do that engine any favors. That's about where things start flying apart in a big engine. 11 years ago, my boss had an MBE4000 make it to 3900 RPM before it blew its guts out on Homestake pass.
bzinger and Rideandrepair Thank this. -
Best case scenario you got lucky and the codes were just alerting you to engine abuse. Worst case scenario your engine is toast because the valves kissed the pistons or something to that nature.
Dino soar, Rideandrepair, pushbroom and 1 other person Thank this. -
Super_Trucker, Socal Xpress, Bakerman and 4 others Thank this.
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Bakerman, Crude Truckin', thelushlarry and 1 other person Thank this.
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SAR, snowman_w900, Dino soar and 4 others Thank this.
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I'm curious what kind of truck/engine this was?
stillwurkin Thanks this.
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