DIESEL TALK | COMMON RAIL PRESSURE RELIEF VALVES & PLUGS

A Fuel Rail Pressure Relief Valve is a fairly simple part that can cause a host of problems on common rail diesel engines. If it’s time to replace you have two options; a stock replacement which will bleed off pressure at a predetermined amount, or a “race plug” which doesn’t. Typically, those running performance parts like a tuner, lift pump, larger injectors, etc. will opt for the plug. This means you: 2003 – Current 5.9L / 6.7L Cummins, 2001- Current 6.6L Duramax’s, and 2011 – Current 6.7L Powerstroke’s! If you have any questions let us know!

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[tinyfitter]

So what is the benefit of a “race plug”. Other than constant rail pressure? What is the the biggest problem with a consistent high pressure? It’s not a water heater or boiler that will shoot like a rocket. Will it harm the motor?

[zemedhunnegussie]

My Common rail around pressure relief valve is very hot during engine works.
What's the cause and the solutions?

[robertgraham]

Suction line cracked in sender assembly, thank you brother,

[cameronbadgwell]

Ive called 2 different auto parts store and they told me it was 300-400 dollars

[michaelpratte]

Please exercise caution if purchasing from this store, as it is part of an AI generated network of stores selling drop-shipped products. The products may be priced higher than normal, be unfit for purpose and/or may not be shipped at all

[thesickening]

Shouldn't be promoting these block off plugs. You know they aren't good for the fuel

[robertgraham]

I have a 2002 lb7.
Lost fuel delivery one day, died, prime from tank to filter prime pump, pump it up, it starts quick, runs then after a bit dies, runs out of fuel. Install fass titanium 165 gph lift pump, runs now but at half throttle power falls off. No codes. Any thoughts...