Detroit Gen 5 DD15 two common issues

Two common issues with the Gen 5 Detroit engine are fallen exhaust valve bridges and leaking EGR cooler seals.

[@CanhNguyenMinh-un8bj]

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[@Mopars_41]

Detroit did finally fix the overhead issue by introducing oil drilled rockers. However, I've noticed a few other common issues with these engines too. Wrist pin failures, usually caused by the valve bridge falling off, camshaft failures again caused by valve bridge failures. The upper liner o-rings will leak coolant and blow a headgasket. Headgasket oil leaks are still common, dd13 Gen 5s had a random issue of not being built right from the factory and the oil control ring was put on the wrong section of the piston. The injection pumps have started to make holes in the housings. And I've seen several with oil starvation requiring an engine or crankshaft replacement. I do like working on these engines, except for the fuel system I have not had good luck with the new high pressure fuel lines. I do not believe that these are good engines because of just how many problems I have seen out of them, but the newer Gen 5s, late 22 to present are definitely better than the early ones.

[@masterkinonc]

Thank you. Got a leak from egr😢

[@gogurl2970]

I have a 2022 gen 5. Recently I’ve had an issue with the unloader valve sticking. What I was told there is no permanent fix yet. It’s under warranty But!!!! Replacing the air dyer or air compressor will not fix it! Are you aware of this issue with these motors? Apparently Detroit and Freightliner are aware. Thanks in advance

[@DieselRepair12]

I am unaware of that particular issue but i will look into it

[@Asmr-jn3so]

Should I buy gen 4 or 5?

[@hosseindizel-hk4xt]

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