2011 duramax fuel leak from bellhousing. One or all three can be your issue.
2011 duramax fuel leak from bellhousing. How To Know When It’s Time To Check The Fuel Filter Housing When the fuel filter starts to leak and allow air to enter, it causes some unique symptoms: If the truck sits for a few days, it requires a lot of cranking to start. looks like comming from back of engine but i cannot find out where from. fuel inlet line from Filter manager to the Injection pump 3. Apr 19, 2016 · Two steady streams of fuel were pissing down each side of the bellhousing, niagara falls type stuff. water in fuel drain line that runs from filter manager to the t valve located upfront by the oil fill cap. i just bought this truck and im freaking out! any help Jan 31, 2017 · I just bought a 2001 lb7 last week and a massive fuel leak started the other day. It took awhile to figure out what the fluid was because it was a small leak, and seemed weaker than diesel (watered down). Took off the inner fender and seems like it’s something around the up pipe and down pipe. I noticed the very front left injector line had a small leak, so I fixed that May 25, 2020 · It has three lines to/from the Fuel Filter Manager, they are known to leak 1. Allison haad some issues with oil coming along the bolts and then leaking into the housing. Leaks often stem from cracked lines or deteriorated O-rings at injector connections. looked under truck and large amount of fuel leaking under truck. Feb 27, 2011 · im new to diesel pick-ups and on gas engines fuel never came out of my trannys lol. Jan 25, 2019 · So today I was driving my truck and smelled coolant. Passenger side of bell housing is shown in photo. It seems to have gotten worse or I am just tired of it so I need some pointers. Customer: I have a 2016 Duramax it started leaking fuel and i can't find the leak. For a fuel leak under the hood on an LML Duramax, inspect the high-pressure fuel lines, injector seals, and fuel filter housing. When you get a leak at the filter, it will drain down through the valley drain and come out the bottom of the bellhousing. One or all three can be your issue. Nov 28, 2014 · Fuel-contaminated engine oil will usually cause a significant drop in oil pressure, as well as rough running, and eventually, the messy overfill condition. 2016. Drivers side bell housing is clean. Oct 26, 2016 · There are NO fuel lines inside the bellhousing. Seems like a major leak but I’m stumped. 5K views 3 replies 2 participants last post by rickygasser Sep 16, 2006 S. Oil pan seal has been replaced and does not leak. I changed the fuel Jan 9, 2010 · If it's dry and the oil is still coming out it most likely is the bolts holding the bellhousing to the main case. Mar 30, 2009 · Check the hoses at the fuel filter assembly ass well as the the fuel heater in the bottom. The coolant comes in the left side, and crosses over to the right side, entering both halves of the block. If an injector is leaking and dumping fuel inside the crankcase, it will dilute the engine oil and look like clean fuel. Can the CP3 pump be leaking? Dec 24, 2020 · 42,000 miles. Saw a lot of burnt on coolant in the exhaust. Apr 1, 2013 · So I have noticed a bit of a fuel leak on my LB7. The fuel leak may be found at the bottom of the flywheel housing. The fuel appears to be coming from the valley of the engine towards the front of the motor. A local "handyman" stops by and crawls under the truck and sees a Oct 11, 2018 · The rear cover of the motors is a removable aluminum "plate" (really a complex casting, but only 1-2" thick) that adapts it to either a SAE bellhousing pattern (Kodiak Medium-Duty trucks) or the standard GM V8 bellhousing (normal pickups). During inspection, a technician may find fuel leaks at the high pressure pump to high pressure line fitting connections, or at the high pressure line fitting to the fuel rail connection, on the passenger side (right). The only way to get at them is to remove the transmission. It's the bottom 2 bolts in the center of the bellhousing. I shut it off for a few minutes and started it back and it quit. I looked up on the DPF side of the engine, and again Mar 7, 2016 · Have a pretty big fuel leak in the valley on my LBZ. I have noticed drips on the ground and I raised it up on a hoist and there was fuel all over the left rear of the motor where it has been running down from the top. Mine was leaking around the fuel heater after the ULSD dried out the O-ring on it. Oct 23, 2023 · I’ll see if I can pinpoint the leak as I remove and replace lines and update this thread. Doesn’t seem to Jan 28, 2014 · noticed a fuel smell a few days ago and now I see a few drips on the driveway, I stuck my head under the truck to see where the leak was coming from, all I see is a stain, wet to the touch from the bell housing on the passenger side. Got home checked it out looks like it’s coming from the passenger side rear of the motor. Jun 7, 2012 · I have a lmm theat the other day I was driving home & started to smell fuel, I got home and after about and hour there was a small puddle of fuel on the ground, then I got in and started it and the change fule filter now came up on the dic the day before the life was at 74%. I cant pin point where the leak is but the intake valley is full of fuel. on the feed line in the valley of the engine it has a nut that holds it together will not stop dripping i’ve tried tightening it all the way down as tight as i can get it i’ve tried re seating it and still can’t get it to stop Jul 16, 2008 · Hi, I've got an 02 dmax that is just dumping fuel out of it. May 29, 2020 · I've got fuel dripping from the bell housing hole and from areas around the interface between the block and bell housing when the truck is running. Bottom port of engine-bell housing shown in the other photo. its an automatic. Has anyone seen a leak in the center that hasn’t left a trail? I’m wondering if maybe the motor is so hot it bakes it off and isn’t able to hang around for me to see since it only does it under high load. Turns out it is pouring from the right side of the motor in the area of the motor mount. My stock cp3 leaked, the 40% over cp3 leaked, and the 80% over cp3 leaks. May 3, 2012 · After arriving in New Orleans with my TC on the back I get a strong fuel smell. I replaced the fuel pressure regulator and the two rubber return lines above the cp3, drained the oil and no Oct 26, 2016 · There are NO fuel lines inside the bellhousing. Dealership will not drop the trans without $ Dec 28, 2021 · Doing a cp3 conversion truck is bone stock other then a Airdog. What could that be? Mechanic's Assistant: It sounds concerning to have a fuel leak in your 2016 Duramax. any help? Nov 28, 2014 · 02 duramax fuel leaking out of bell housing 02 Duramax leaking fuel from bell housing doesn't smoke or start hard runs a little rough is it the injectors or the pump 11-28-2014, 15:40 #2 rapidoxidationman Aug 31, 2021 · So I’m having a terrible fuel leak coming from rear of engine, cannot see where all I can see is when the truck is running fuel starts to drip out and when I put it in high idle it’s basically free flowing. The leak comes from the back of the engine, and drips from the back of the oil pan onto the ground. Truck starts fine if you let it prime a second or two I Found And FIXED My LB7 Fuel Leak, WE ARE BACK IN BUSINESS! Plus New Rear Window Sticker Reveal! Sep 15, 2006 · Leaking fuel, dripping off bell housing? Jump to Latest 4. Recently I have noticed a pretty healthy fuel leak on the ground while idling. The entire underbody including exhaust was covered in fuel, kind of scary. May 18, 2010 · went to work this am. Then it may be pushed out the rear crank seal- [inside the bellhousing] Drop some engine oil on a clean paper towel-- the oil will make a spot on the towel, and the fuel [if any] will make a halio around the oil spot. I wiped clean the rubber fuel lines that go from the chassis and engine, and no leaks appear in that area. When driving, fuel is sprayed all over the undercarriage. Can you tell me where approximately the fuel seems to be leaking from? Customer: On the passenger side running down by the bell housing but can But, because there is suction at the Duramax fuel filter, when the housing leaks, air is sucked in. The rear cover off my motor: You can see the two Dec 16, 2016 · Hey there, so i just bough an 07 lmm Ltz from someone and told be there’s a built trans (750hp rated) with paperwork showing and when I went to look at it it’s leaking excessively between the bell housing and the motor. maybe there is something above the tranny leaking that i can see but it sure as hell looks like fuel is pouring out from around my tranny. I can't find anything from the top leaking, all down low. Oil filter does not leak. 5 LLY with 232k mikes on it. fuel line from the lift pump to the Filter manager 2. It runs from the front of the valley under the cp3 and goes down around the bell housing and Dec 11, 2014 · It leaks right at the interface-the only difference is that the cp3 on the cummins is external to the engine (driver side, in front of the fuel rail) versus the duramax, which obviously is in the valley. There was fuel in the valley but I figured that Nov 30, 2019 · I have a 2004. I searched a few different things already and got a pretty Sep 7, 2023 · Here's a piture of diesel dripping from the flex-plate/torque-converter-bolt access port of the transmission. As John said, a leak in the valley area will drain onto the bell housing. I again looked at the top of the engine, including the injector sites, and I don't see any diesel on the top of the engine. Its been leaking since before I got the truck and was so small I wasn't worried about a drop or two. 1yakwks85gn19u5kdpqvybif1hvup5qgnujk3eh6uocqq