Where does the fuel leak go on a Duramax?
Where does the fuel leak go on a Duramax?
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.
Where is the fuel pressure gage on a Duramax?
You will notice a hydraulic style fitting at the front right side of the engine, this is for a fuel pressure gage to test the suction side, good luck finding a fitting to snap on to it,I had to get a Kent Moore gage for 400 bucks,I use it all the time as well as a Tech 2 scan tool. I consider these a must for serious Duramax work.
What to do with a broken line in a Duramax Diesel?
You can open a can of worms trying to replace the return lines at the injectors, the lines snap into the injectors with plastic tees that love to break off in the injector,I have had luck heating a screw and melting it into the broken piece for extraction. I usually disassemble a new line set and replace only the leakers individually.
Why is my Duramax diesel engine not starting?
I have seen more leaks causing no starts, loss of prime and low fuel rail pressure codes from poor fitting aftermarket fuel filters use Delco only. Remember when dealing with power loss and fuel pressure issues the duramax has no in- tank or frame mount fuel pump pushing fuel to the engine.
What happens if the crankshaft on a Duramax goes bad?
Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet.
Are there any issues with the Duramax fuel pump?
The new injectors available from us and others are updated and do not have the cracking issue. Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank.
Are there any problems with the LLY Duramax?
In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.
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.
I have seen more leaks causing no starts, loss of prime and low fuel rail pressure codes from poor fitting aftermarket fuel filters use Delco only. Remember when dealing with power loss and fuel pressure issues the duramax has no in- tank or frame mount fuel pump pushing fuel to the engine.
You can open a can of worms trying to replace the return lines at the injectors, the lines snap into the injectors with plastic tees that love to break off in the injector,I have had luck heating a screw and melting it into the broken piece for extraction. I usually disassemble a new line set and replace only the leakers individually.
You will notice a hydraulic style fitting at the front right side of the engine, this is for a fuel pressure gage to test the suction side, good luck finding a fitting to snap on to it,I had to get a Kent Moore gage for 400 bucks,I use it all the time as well as a Tech 2 scan tool. I consider these a must for serious Duramax work.
Where does coolant go in a Duramax Diesel?
If it can be determined the coolant loss is from the driver’s side (engine right side) of the engine, the following information should be considered. Leaks from the exhaust gas recirculation (EGR) cooler may allow coolant to pass through the exhaust system and enter the combustion chambers on the right bank cylinders.
What causes a Duramax injection pump to fail?
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 won’t 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.
Why does my Duramax not start after running?
Usually they don’t want to start after they have ran for a while when you have injector fuel return issues. That’s why I’m leaning toward something electrical. I have used the crap out of starting fluid. Its usually getting the air out out of injector lines on mechanical injection systems after pump and or injector replacement.
Why does my Duramax engine keep losing Prime?
Its usually getting the air out out of injector lines on mechanical injection systems after pump and or injector replacement. Don’t leave the key on and allow the grid heater/ glow plugs to get hot. Spray either, turn key and start immediately. Key is don’t be a an idiot and spray half a can.
Can a Duramax diesel engine be kept warm?
Huge no-no for modern diesel engines as your grid heater in the intake and glowplugs stay on until the truck is “warm”. Also sometimes rebuilding the filter head isn’t enough, you have to replace it. Click to expand… Yeah I wasn’t to fond of spraying it.
