Sometimes it's the little things that make your life better. Although it is widely known that under-hood temperatures in diesel trucks can fatigue sensitive components like wiring, connectors, hoses, and more, it's important to note that time also plays a big role in the degradation of these parts. The longer trucks are in service, the greater the possibility of there being more failures.

On 2001-2016 6.6L Duramax diesel engines, one simple yet critical component that succumbs to the long-term environmental effects is the stock, plastic air-bleed screw on top of the fuel-filter housing, right next to the passenger-side exhaust manifold. Simply tightening and loosening the fastener ultimately leads to its demise. Yes, the screw eventually will fail, usually at the worst time.

Conventional thought suggests replacing the plastic screw with a piece that is more durable, yet lightweight. There are several options available, but we're impressed by PPE's Billet Aluminum Air Bleeder Screw for the Duramax powerplants: a direct replacement for stock piece that is available in black or yellow anodize and includes a nitrile O-ring.


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