PRESSURE RELIEF VALVE 04.5-05 LLY

Product Description

Fuel Rail Pressure Relief (Limit) Valve 04.5-05 6.6 LLY Duramax

Bosch OEM fuel rail pressure relief valve, or limit valve, is installed in the left hand (driver’s side) high pressure fuel rail on the LLY Duramax

Fits: 2004.5, 2005

Fuel pressure relief valve failures may cause:

• Lack of power, due to low rail pressure (link to blog post)
• Poor fuel economy, due to a weak pressure relief valve.
• P0148, P0087 or P1093 low rail pressure, depending on the vehicle
• The pressure relief valve (limit valve) is in the fuel rail; it is designed to limit rail pressure to avoid damage to your injectors. If the rail pressure is excessive, the relief valve will open and bleed off pressure into the return system. The pressure relief valve may start to leak, prematurely, not allowing the rail pressure to build to the correct pressure. This means the injectors do not get adequate rail pressure. Many will take the option to simply block off the relief valve, which works, but it does mean that you are removing a built-in safeguard. Would you remove the blow off valve from an air compressor, which builds less than 1% of the pressure? If you’re like many and would prefer to reinstall a new pressure relief valve, order this genuine OE Bosch unit for years of trouble-free service.

OE part number 97358556, 1110010024, Also fits 129A00-57200 Yanmar, MIU802775 John Deere, 8973585561 Isuzu, T413278 Perkins, 32K6107300 Mitsubishi