01
May
Nearly half of the check engine lights that come in for the Duramax pickups are for glow. Its common particularly on 2001-to-2007 LB7 models for the filter housing before the filter to develop cracks and leaks in the O-ring allowing air to enter the system.
Collapsing or cracked fuel line between the filter head and the high pressure fuel injection pump cp3.
Duramax fuel filter problems. The following tip applies to all 2001-06 General Motors trucks equipped with the 66L Duramax Diesel engine RPO LB7 or LLY. There are a couple of issues with the fuel filters on these vehicles. GM has released a revised fuel filter.
The new filter is longer than the original filters used and has a plastic housing. A common problem with high-mileage 2001-2010 Duramax trucks is that the fuel filter head assembly begins to develop air leaks. The engines CP3 high-pressure fuel pump is capable of drawing fuel from the tank without the aid of an external lift pump as long as the system remains primed.
I dont know about CAT fuel filters but me personally I wouldnt use them. From what Ive read you need a special adapter to use the CAT filter on the stock housing. This is what I and many other people suggest.
Racor Fuel Filter for a ChevroletGMC 66L Duramax Diesel 2001-2014 Part PFF50216. The most common issues 66l Duramax fuel injector repair experts often point out is air getting stuck in the fuel lines and fuel starvation. The design of the filter housing is the cause as Duramax does not utilize a pump.
Instead the engine operates by vacuuming the fuel from a tank with the help of an injection pump. One of the most common problems with this design that 66l Duramax fuel pump repair experts point out is that over time a crack tends to develop in the fuel filter. Fuel Starvation andor Air in the Fuel Lines The Duramax diesel is susceptible to fuel starvation and getting air in the fuel lines.
This can be contributed to the fuel filter housing design and the fact that the Duramax does not use a lift pump. Rather the high pressure fuel pump injection pump is responsible for vacuuming fuel from the tank. As a result allegedly the lack of lubrication in the fuel can cause a premature failure of the injection pump to a point where it wont allow the LML Duramax to run.
You can be driving down the road and everything seems normal and when the pump fails the truck just shuts off. The Duramax has long been susceptible to fuel starvation failures because the engine doesnt use a lift pump to feed the primary pressure pump. Its common particularly on 2001-to-2007 LB7 models for the filter housing before the filter to develop cracks and leaks in the O-ring allowing air to enter the system.
There was a Tech Service Bulletin on the 2011 Duramax for a faulty fuel suction pressure sensor. I dont have the bulletin number but believe it was released about December of 2011. The function of the sensor is to trip the change filter message when the filter began to get restrictive to flow but it does also affect engine controls and performance.
Glow Plug System Issues. Nearly half of the check engine lights that come in for the Duramax pickups are for glow. Head Gaskets.
As these truck reach the 100000-150000 miles we are seeing more and more head gasket issues. Water Pumps. Another issue with the LB7 Duramax is the.
Collapsing or cracked fuel line between the filter head and the high pressure fuel injection pump cp3. This is usually caused from a plugged fuel filter causing a major vacuum between the filter head and the cp3. If not cracked the problem is usually fixed by replacing the filter.
5 Most Common LMM Duramax Engine Problems 1. With the evolution of diesel emissions standards the LMM added a diesel particulate filter or DPF. Similar to the LBZs transmission line problems the transmission cooling lines are also.
LMM Low Fuel. Both kits are described below. Our Duramax Dual-Filter Kit is for both better fuel and water filtration and is an inside-the-frame mounted nice and tight up under the cab.
This kit requires NO drilling or welding. You simply bolt this on to the frame rail using existing factory holes connect the 12 hoses to your stock fuel line using the supplied steel compression fittings and provide. Fuel leaks on a duramax are almost always on the return side of the system the smaller of the two fuel lines traveling down the frame rail going to the fuel cooler and back to the tank.
They can leak at the cloth covered rubber return lines at the injectors these lines can only be replaced in sets left and right side they are expensive. Anytime your fuel filter gets clogged it has the ability to reduce the flow and weaken performance as the engine will have difficulties drawing fuel. However with a clogged filter the fuel pump will work much harder and you may have problems starting the car or notice poor acceleration or stalling.
Your vehicles parts might damage. One thing the 01-04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.
Fill the new Duramax fuel filter with fresh diesel. Lower the new fuel filter through the engine compartment down to the passenger side frame rail. Step 7 Move back to the front passenger side wheel well and screw the fuel filter onto the fuel filter housing.
Royalo 66L Chevy GMC Duramax Fuel Filter Adapter Kit with 1-R0750 Filter Bleeder Spacer Air Screw and Primer Base Seal Rebuild Kit for Chevrolet Diesel Engine. 40 out of 5 stars 11. Get it as soon as Tue Feb 2.
FREE Shipping by Amazon. More Buying Choices 3012 2 used new offers. With an O-ring mounting surface for a leak-free seal this filter will protect your fuel system to make sure contaminated fuel damage vital fuel injection components.
If your GM Duramax 59L or 67L Cummins has an XDP CAT Filter Adapter this filter is a great alternative to the 1R0-750.