When does a LLY Duramax water pump fail?
When does a LLY Duramax water pump fail?
While the seal issues found on LB7 trucks have been largely solved, the LLY Duramax can still suffer from water pump failure. Over time and at higher mileage, the seals in the factory water pumps can fail. This frequently occurs after 80-100,000 miles.
What causes a LLY Duramax fan to overheat?
Despite these issues, a majority of LLY Duramax overheating is actually caused by other common LLY Duramax problems. Blown head gaskets, water pump failure, fan clutch failure, and even a dirty or clogged radiator can be the root cause of your overheating issues.
When did the LLY Duramax engine come out?
The LLY Duramax engine found on 2004-2006 Chevrolet/GMC HD trucks is the second generation of the Duramax line. It can last hundreds of thousands of miles, but it still has its fair share of issues. Thankfully, the LB7 injector problems were resolved, but some new problems revealed themselves.
Where does the coolant leak from a water pump come from?
My leak appears to be coming off the back side of the pump housing, but originating above the area that i can see with a mirror. Surely somebody out there in cyberspace has seem the dark side of the moon behind the water pump and could direct me on this.
How to replace the Waterpump on a Duramax Diesel?
Use the nippers or the pin pliers for the pins. Unhook the A/C line from the shroud clip. Remove fan shroud. 6) Install the cardboard, plywood or sheet metal over the engine-side of the radiator. If you dont do this step, you had better be EXTREMELY careful from now on.
Where is the coolant coming from behind my water pump?
It’s not coming from the weep hole. What sort of structure above and behind the water pump could leak coolant? My leak appears to be coming off the back side of the pump housing, but originating above the area that i can see with a mirror.
Can a LB7 oil cooler pipe be replaced?
If you do remove the pipe, make sure you have a replacement o-ring for the upper seal. Like I stated above, an LB7 injector sleeve o-ring works perfect. If this o-ring gets cut, you’ll have a big mess later on. More on that later. 13) There are two 12mm nuts holding the oil cooler tube to the back of the pump.
How do you remove the fan shroud on a Duramax Diesel?
To remove the upper fan shroud, there are two other 10mm bolts along the top, and 4 push pins connect the upper and lower fan shrouds. Use the nippers or the pin pliers for the pins. Unhook the A/C line from the shroud clip. Remove fan shroud.
Where is the water pump on a diesel truck?
The short section of 3/8 inch hose looked like it needed to be replaced, and it was. Time to remove the two nuts that connect to the pipe that goes to the oil cooler. The one on the engine-side (the red arrow) is easily accessed from under the front of the truck.
How big is socket for Duramax water pump?
In case you were wondering, this is why the 36mm socket for the balancer has to be a 12 point. Finally, don’t forget to remove the locking tool and re-install the inspection door. That Lisle tool set was the best thing to happen to Duramax waterpump replacement, period.
What should I use to replace my water pump?
You can also use a hammer and chisel in place of the air hammer suggested by TheBac. You might use this before the wedge just to loosen things up. The fan is off. Here is the fan pulley, front and back. This connector goes through the hole on the fan pulley.
What should I do to my Duramax water pump?
Once you get the fan and cage out of the way its no different then the older duramax’s. Going by the book GM says to pull the starter and install the flywheel holding tool for breaking the balancer bolt loose and tightening it. This is where a lot of the excess time comes in.
Do you have to pull starter on GM water pump?
Going by the book GM says to pull the starter and install the flywheel holding tool for breaking the balancer bolt loose and tightening it. This is where a lot of the excess time comes in. If you get the Lisle tool kit you can shave off an hour or better right there by not having to pull the starter.
How long is the water pump on a GM Truck?
I want to smack the GM engineer in the head who came up with that fan shroud design on the 2006+ trucks. That thing is the devil. Click to expand… Id rather punch the guy who clocked the one water pump housing fastener behind the balancer. Water pump would be a two hour job at most if it had been designed just a hair differently.
How long does it take to fix a water pump?
Alldata says 5.9 hours. Mitchell’s says 7.5 hours. Preparing correctly, it can be done in 4 hours. Dealer quote will most likely land in the $1100 parts and labor.
Are there any problems with the 6.6L LLY Duramax?
Thankfully, the LB7 injector problems were resolved, but some new problems revealed themselves. Some of these 6.6L LLY Duramax engine problems stem from the fact that it has significantly more horsepower and torque compared to the original Dmax.
What causes a Duramax diesel truck to overheat?
Its restrictions cause excess heat and force the turbocharger to work harder than necessary. The LLY experiences more overheating compared to other generations of the Duramax diesel because of its inadequate cooling system. They have the smallest radiators and fans found on any Duramax diesel truck.
What causes the LLY Duramax Turbo mouthpiece to choke?
The LLY Duramax turbo air inlet manifold, sometimes called the turbo mouthpiece, forces the turbocharger to work harder than it needs to. It does this by essentially choking the turbo because of its small, restrictive design, forcing it to work harder to produce the same amount of boost. This results in excess heat and EGTs.
