Lb7 crankcase breather. You need to check further.
Lb7 crankcase breather. The main symptoms are (at least from my own experie Jun 18, 2018 · i have a 02 lb7 zf6 and I'm having a issue with excessive smoke from the crank case vent tube. I have 2 lines - 1” ID pvc 8’ long shown in the picture going down both sides, and a breather. Not loosing coolant or making oil. While it was apart, I went over the install of the crankcase vent breather diaphragm. The crankcase breather tube is located in the front passenger side of the block. Crank Case Vent breather relocation Kit (also known as CCV reroute) This Crankcase Vent (CCV) kit is designed to re-route your crankcase vapors and oil away from the intercooler and turbo toward the rear of your 94. 6L Duramax Increase Quantity of SWAG Crankcase Breather Fitting Set - 06-10 GM 6. 6L Engines Add to cart Moker Billet Aluminum Crankcase Breather Repair Fittings for GM GMC DURAMAX DIESEL 6. It's a metal tube that is on the front left of the engine as if you were standing in front of the truck staring at it. Those engines run a million miles + like that and don't have problems. Oct 16, 2012 · That's the crankcase vent. Apr 14, 2011 · The breather pipe comes out of the alternator bracket at a higher point and then goes down and is open to the air at the right front of the engine. 5-2010 LLY/LBZ/LMM Duramax engine which are prone to damage with these high quality, black anodized, CNC machined billet aluminum fittings from WCFab. Inspect the PCV valve for clogging and test compression to confirm ring wear. Along with that nice road draft tube also came oil drips and the vapors spewing from it. Nov 14, 2010 · My lb7 with 113,000 miles has white smoke/steam that comes out of the crankcase breather tube by the oil pan. Still do the easy check for blow-by (cap upside down on the fill tube to see if it stays put). Aug 7, 2013 · Buddy has a 02 duramax smoking out of breather. My oil pressure is good, fuel mileage sucks a Mar 10, 2011 · The top cover is an lb7 and that little square thing in the center of the cover with the tube sticking out of it is the PVC breather. Located in the center of the valve on your LB7 equipped truck or van. Premium quality, fast shipping, and in stock. The injectors are done, both tested them as Jun 6, 2004 · The blowdown tube on the 2004 6. Originally I thought the rear main seal was leaking because the oil has ran to the back of the oil pan and on to the front of the Check Valve - Crankcase Breather Filter Kit, Engine runaway can be caused by oil vapor that travels through the crankcase breathers and into the intake system. Keep puddles of oil out of your Feb 13, 2011 · If anyone is in between buying or making your own PCV Reroute kit, I put this together to help out. Jul 11, 2011 · other side of engine (passenger) theres a tube that comes out the bottom. I have 108,000 miles on the Nov 14, 2010 · My lb7 with 113,000 miles has white smoke/steam that comes out of the crankcase breather tube by the oil pan. Feb 6, 2013 · Made it back and looked down and had little no oil pressure. The reason being is that moving the factory crankcase to under the truck not only looks better but does help with making room and keeping the engine bay cleaner. If you have coolant coming out of that one, hoo-boy! If you are referring to the air intake breather, same thing. My oil level has not changed any. Injectors were changed like 20K ago. Jan 26, 2015 · Okay, i have an oil leak, best i can tell it's coming out of crankcase breather, the oil doesnt smeel like diesel, and i have no hazy smoke when it's running. Shut it off got in inside and fuel was running out of the breather tube. 5 You just described the 02-04 LB7 crankcase breather system to a T. I Feb 16, 2015 · Can anyone tell me if you can buy the pcv pressure diaphram's by them self without buying the upper valve covers? I have already replaced the pcv valve and still have oil and exhaust gas coming out down tube. '03 4dr shortbox lb7 EFI live, Fass, a work in progress! Duramax PCV Crankcase Breather Filter Kit, 2004. 3 diesel. Detailed diagram of 04 Duramax LB7 parts, providing clear illustrations for easier identification and understanding of key components and their functions. Tamerx Crankcase Breather A4720107662 for Detroit DD13, DD15 is built for 2007–2014. also getting lots of smoke out of the exhaust, looks blueish/grayish/white i cant Don't gum up your turbo in your LMM Duramax with recycled crankcase gases, upgrade to the PPE Crankcase Breather Kit. also took the breather filter the catch can came with and tapped in the oil fill cap. Symptoms of A Faulty Crankcase Breather Description This kit fits 2006-2010 Duramax Pickups with the LBZ/LMM motor with the turbo intake mouth piece. Jun 17, 2008 · the lb7 duramax for your year of truck does not have a pcv system it only has a crankcase breather system instead of crankcase fumes bieng sucked into the turbo it simplly has a baffle in each valve cover that is connected to an open breather hose that runs down the side of your block. I have 130K Edge chip, 4" exhaust, AFE intake. Like I am embarrassed at a stop light smoke. It had absolutly no blow by and was THE quietest motor i have ever heard the rockers where set at 11thou and i had installed arp head studs in it before i installed the motor in my truck. 6L LB7 Duramax Federal Positive Crankcase Ventilation Hose PCV Will not fit California Emission trucks. Oct 19, 2015 · LB7 Excessive Crankcase Pressure Jump to Latest 8. I'll check out getting it scrubbed down this weekend, tearing it down for injectors. Figure 1, Left: Signs of Excessive Oil from Crankcase Breather Tube. A faulty or clogged blowdown tube or a bad turbo oil drain valve can cause oil to be expelled through the crankcase vent. Prevent oil vapor issues and ensure longevity. Here is the TSB for a possible issue. Mar 1, 2008 · I'm a bit confused, I thought I had a LB7, but I have seperate fuel tubes going to each injector external to the valve cover. This is also a nice way to clean up your engine bay for more room for modifications. gif [/img] Fits: 2002 thru 2004 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7 Duramax Diesel *Check pictured diagram to confirm part number and call out number* *California Emissions engines only* Replace your worn out positive crankcase ventilation hose/s. Started with light smoke out the tail pipe. PPE 114020405 2004. We did injector balance test, #4 is reading +10 Jun 29, 2017 · Buy PPE BILLET ALUMINUM CRANKCASE BREATHER REPAIR FITTINGS 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 GM GMC DURAMAX DIESEL 6. Hand full of bolt ons. Question is how did fuel get into crankcase Aug 11, 2005 · boots, As John said a little oil around the end of the LB7 vent tube is normal. I am not saying anything bad about anyone's kit. DmaxStore Note: Will NOT fit California Emissions engines Not sure what The PPE 114028000 Crankcase Breather Tubing Kit includes the hoses and clamps needed to re-route the crankcase breather in your 2004. At least I think it's the vent. Coolant doesn't belong there, either. Oil seems to be dripping out of blow by tube on front passenger side of motor at the front of oil pan were it mates to the block. The crankcase breather is also known as the "CCV. #PIP3380: 6. DmaxStore Note: Will NOT fit Federal Emissions (FE9) engines Not sure what Don't gum up your turbo in your LMM Duramax with recycled crankcase gases, upgrade to the PPE Crankcase Breather Kit. I sold this motor to Josh and it ran flawless for me it was never efi live tuned. Started it back up and the oil fill cap had a ton of pressure on it. Nov 29, 2011 · I was thinking the LB7 didn't have a PCV, just a vent tube? If it does have a PVC, check to make sure there is suction on the vent (crankcase) side of the hose. Yeah I get the dirt/gunk where the wet surface is but in the upper area of the photo there is some soot like buildup that concerned me as well. All stock with the exception of a lift pump. Jun 6, 2011 · Gents, 02 LB7 with 78k miles. Reduces internal engine pressures. Feb 19, 2012 · It's normal to have a little bit of oil down there since it's basically a crankcase breather. When this happens a drop in oil pressure is also noticed. Now 1" id hose to catch can and 5/8 hoses to 3/4 hoses from PCV ports to catch can. 6L LB7 Duramax routes excess crankcase pressure from the turbocharger’s oil drain system. And the years I worked for Cat, there was always a light film of oil coming out of those. This Crankcase Ventilation System provides a SOLID solution to eliminate unwanted crankcase pressure and effectively eliminate any power-robbing crankcase pressure. SPELAB CCV PCV ReRoute Engine Ventilation Kit For 2004 2005 2006 2007 2008 2009 2010 6. 6L LLY DURAMAX PCV BREATHER REPAIR KIT PPE parts are some of the top in the diesel world. Drained crankcase and confirmed it was full of fuel. My VIN says I have LB7. 5-2005 GM 6. If you block the pipe it builds up pretty good. OE Replacement crank case vent diaphragm. Repair your factory plastic valve cover breather system by replacing it with the PPE breather repair kit for LLY Duramax engines. Crankcase Ventilation Oil/Water Separation Kit During the development of our PPE 3. 2002 Chevy 2500HD Crew - Original owner - 470,000 miles so far. Does anyone make a good kit to fit valve cover ports and where I can route it to a catch can or?? If anyone has done such and has some input let me know please . I had heard some places s Jan 23, 2014 · recently i have been getting a lot of smoke out of the crankcase breather and oil cap when engine is warm only 150-190* coolant temp, i separated the two PCV vents to each side and the driver side is way worse. 6L Duramax Mar 18, 2007 · My truck is pouring white smoke from the crank case vent. 6K views 5 replies 4 participants last post by PlugItIn Nov 13, 2015 PlugItIn Discussion starter My 2001 GMC Sierra 2500HD was apart for work. Aug 8, 2007 · Eventually, it makes its way out the crankcase/oil breather tube and all over the underside of your truck. I just had a gm tech check the injectors and everything was ok. [img]smile. Made of quality materi Apr 6, 2010 · I know my lb7, when hot, would smoke a little out of the breather, but I had to be beating on it pretty hard to get that. Mar 1, 2010 · I am really smoking out the breather tube, not really any oil ( just a little residue) leaking but alot of smoke. 5-2010 GM Duramax PPE Crankcase Breather Repair Fittings are made from machined billet aluminum and replace stock composite plastic fittings. Dec 24, 2016 · The only thing keeping combustion pressure from getting past the injector into the engine and pressurizing the crankcase is the injector hold down bolt holding pressure on the copper sealing ring and the o-ring on the injector body. You're saying that just daily driving it does that now?? 02-04 GM Duramax LB7 - CCV (Crankcase Ventilation) Pipe w/ heater hose #97307063 Diesel Boneyard (76) 100% positive Jun 6, 2010 · Eliminate engine oil from contaminating your turbo, intercooler and intake system. Is this component a PCV valve or an oil separator? The reason I'm asking is that I received information from this site indicating that the light blue Aug 29, 2007 · 2003 Chevrolet Silverado 2500 Allison LB7 SB/EC LS 4X4 Autometer Boost/Pyro, Dual Straight Pipe, Sirius Satellite Radio, Smittybilt Nerf bars, Diamond Plate Bed Rails, High-Fog Headlight Mod, Fast Idle Switch, 06 Mirrors. Also when I pull the dipstick and open the oil filler cap I get a white steam/smoke blowing out when the truck is running. Kit includes 5/8” ID hose, clamps, T-fitting, and heat shield. " This type of filter in the crankcase prevents foreign particulates. OEM GM replacement PCV hoses for 2001 Chevy/GMC 6. Repair or reroute your Duramax's PCV system with custom components from DHD. May 27, 2015 · There is a PCV, it just happens to vent to the atmosphere on the LB7. Hoo-boy. Smoke from the breather tube usually indicates blow-by gases escaping past worn piston rings or valve seals, causing excess crankcase pressure. Composite plastic can become brittle and fail. It prevents oil from contaminating your intake which promotes carbon and gunk buildup in you intake manifold. 4K views 0 replies 1 participant last post by SiXSiXMAFIA Jan 27, 2015 S May 6, 2010 · 01 dmax, has white smoke blowing at a good rate out of the breather. 03 and #7 -2. should have no issues as far as The PPE 114028000 Crankcase Breather Tubing Kit includes the hoses and clamps needed to re-route the crankcase breather in your 2004. Mar 2, 2018 · Having heard and weighed concerns I decided to up the sizes of the lines and then some. 0L Duramax Intercooler and Turbo Resonator Delete Tube, we confirmed that these trucks emit a significant amount of oil and hydrocarbons through the crankcase ventilation system, which are directly routed back into the turbo compressor housing. 5-03 PowerStroke 7. Engine runaway can be caused by oil vapor that travels through the crankcase breathers and into the intake system. 6L, Stops normal oil vapor from contaminating the turbo, intercooler, and intake system. Decrease Quantity of SWAG Crankcase Breather Fitting Set - 06-10 GM 6. can anybody point me in the right direction on possible corrections to this? Jul 9, 2017 · 02 lb7 180k miles. Once th engine is warm it get a ton of smoke pouring out of everywhere to include excess from tail Jan 27, 2016 · The LB7 engine can dump diesel in the crankcase if an injector is leaking. The procedure for checking the PCV check valve is found below. Aug 26, 2007 · 2003 reg cab BLACK like i like my women lb7 Edge juice/att trippin mount, afe stg 2, MBRP 4in turbo back straight pipe exhaust, Transgo shift kit, new clutches, 33x12. Ive had indications of injectors going bad. just had head gaskets and 3 injectors replaced. Duramax PCV Crankcase Breather Filter Kit, 2006-2007 GM 6. Jan 11, 2010 · The crankcase ventilation system on the 6600 Duramax engine vents the crankcase gases to the atmosphere. No idea where it came from. -Hot crankcase vapors interfere with a fresh, cool intake charge -The system allows oil liquid through the Mar 21, 2025 · 2002-2004 6. The 6. The GM Duramax diesel engine (Figure 1) was introduced in the 2001 model year. Root Cause: Debris from valve cover manufacturing process can plug the lubricating oil separator breather system, preventing lubricating oil from draining back to the crankcase. 6L LB7 Duramax Diesel Oil Leak from PCV Vent Tube - keywords contamination crankcase fuel - (Mar 31, 2005) View Full Image Subject: 6. These breathers route the breather hose from the turbo intake to a catch-can along the side/bottom of the engine, … The PPE 114025000 Crankcase Breather Filter Kit for your 04. There's 4 screws in each one. 6L 2001-2010,Set of 2 Add to cart Replace the fragile plastic OEM fittings on the top of your 2004. , to help you protect your engine's lifespan and performance. 6L Duramax when using the PPE Crankcase Breather Fittings (sold separately). It's common for the rubber to dry out and crack over time causing leaks. You need to check further. My LB7 has a blow-by but no PCV. How do I test to see if the pcv valve is bad or lines plugged? Jul 5, 2025 · Learn about the role, common issues, and maintenance knowledge of crankcase ventilation systems: covering the differences between breather devices and PCV valves, the impact of malfunctions, replacement methods, etc. I have taken the truck to two mechanics. Took a light and looked down in there and could see diesel fuel running into the oil fill. There are multiple issues this design creates in the Duramax. 5-2010 Duramax PCV/ CC Breather Reroute Kit (LBZ-INT-A008) With Dirty Diesel Customs! Save Duties & Brokerage; Shop Canadian Mar 20, 2006 · The problem: Unlike the LB7, the LLY has a closed PCV system where the crankcase is vented back into the intake tract. Rerouting or increasing the size of your engines crankcase vent can help prevent excess oil consumption and control added internal pressures at max boost. Duramax PCV Crankcase Breather Filter Kit, 2007. Jun 4, 2010 · I am getting a lot of oil fumes from under my hood while running? I noticed some oil coming from the crankcase breather tube on the front of the engine by the oil pan. Enhance your 2004-2010 GM 6. Aug 11, 2005 · My crankcase vent tube has always blown out a light film of oil since the day I took delivery of it. ben 06 audi S4, V8/6spd 05 dmax/allisonalways testing something new -BT DieselWorks, LLC- Specializing in a wide range of custom electronics and great gadgets for your 2001+ GM full size truck/SUV Sep 9, 2005 · I checked out an LB7 the other day, and making the crank case vent out of the engine instead of in the intake is going to be a breeze, just some 3/4 hose, 4 clamps and a plug is all that will be needed, going to do it on mine this week probably. I would first like to say that their are many kits out there that you can buy or put together. 5-10 GM 6. The routing has got to be changed to work with my new air cleaner / y-bridge etc. Any thought? Jul 3, 2012 · discovered fuel coming out,I think from breather,crankcase was full of fuel but truck runs fine. Jun 29, 2013 · OK so my brother takes my truck yesterday and texts me and says it has some blow by out of the breather tube. What comes with the Billet Valve Covers Crank Case Ventilation Kit? Aluminum Fittings -10 Nylon Braided Hose Overview Routes Breather to behind front cab mounts Cleaner look Jan 26, 2015 · Lb7, oil coming out of crankcase breather? Jump to Latest 2. Customer: Regarding the Duramax 2001 LB7 crankcase ventilation system, I have a question about the hoses that connect from the rocker covers to the small box located in front of the alternator, which has a small hose returning to the crankcase. This can result in oil-fuel blowing out the vent tube and coating the underside of the truck. 6L - 114020000: Breathers Sep 8, 2016 · Crankcase Ventilation System Description A closed crankcase ventilation system is used in order to provide a more complete scavenging of the crankcase vapors. 6L LB7 Duramax engines. You will also notice that their engines had a crankcase breather system designed to be ran to atmospheric pressure. Same systems are used on CAT generators and they roll some smoke and oil all the time. Aug 3, 2014 · Why is oil coming out of the vent tube by the balancer? Oil is everywhere. Thanks for any help. Jun 4, 2010 · If there is no fuel in the engine oil and the crankcase is not overfilled with oil, check for a sticking or inoperative PCV check valve. About to get new injectors and indications shift to other issues. Don't think much of it I get home from work last night to return my gf's dad's trailer and holy white smoke This replacement crankcase ventilation filter matches the fit and function of a cracked, clogged or missing original equipment filter. However, a bad injector or leaking return line an cause the crankcase to fill with fuel. 6L LB7 Duramax Diesel Oil Leak from PCV Vent Duramax engines often face excessive crankcase pressure and breather tube smoke due to worn piston rings or valve seals. 5-2010 GM 6. My thoughts were CP3. Oct 15, 2015 · Crankcase breather block drain hose hooks into the block may be leaking. The cavity holds about a cup of oil. Reduce the chance of charge pipe boot failure and the possibility of uncontrolled engine revs or engine runaway during competition use. Aug 31, 2009 · The "breather hose" at the front/right of the engine that extends down is the crankcase breather. I thought I read that the LB7 has only a single fuel tube , one for each side of the engine. Feb 17, 2019 · Add a oil fill neck breather, that way if by a strange chance the end of the PVC reroute get’s clogged, you’ll have the breather allowing the vapors to escape thru the breather, not blowing out your seals. Right: Normal Oil from Crankcase Breather Tube. Inspect the PCV valve for clogging or sticking, as it regulates ventilation and prevents pressure buildup. New to this and needing some help but the crank case breather smokes a decent bit and ive put on a one new pcv/ccv valve and that didn’t change a thing, can anyone help and tell me what is causing it Mar 10, 2012 · Ok im getting excessive blowby out of my vent ,no fuel in my oil,my upper coolant hose isnt rock hard,But my #6 injector balance is reading 8. Tubing Kit for PPE Crankcase Breather Kit Used in conjunction with PPE Crankcase Breather Repair Fittings. Next to the crank balancer is a crankcase vent tube- if the oil is over full, it will blow oil out the tube and show leaks at the front of the oil pan. This kit uses CNC machined billet aluminum valve cover adapter fittings and oil rated 5/8" hose for a secure and reliable fit. It sat for 9 years then i bought it,installed it for 6000 miles while my motor was being built. I am simply just showing what I put together and In this video, you can see what are the symptoms and a solution to a faulty or blocked crankcase breather. I tell him its not a big deal and that it always has a real slight haze. 50+ bought in past month Add to cart 114020000 PCV Crankcase Breather Repair Fittings Set for DURAMAX DIESEL 6. Replacement oil filters, transmission filters, and oil pans are great options for replacing your factory parts using some PPE alternatives. Dec 30, 2023 · Rarely does the Duramax put coolant in the oil, they typically pump combustion gasses into the cooling system Since yours apparently leaked into the crankcase you are probably are going to need a teardown. Apr 21, 2013 · Hey guys any ideas on this 1. Located in both valve rocker arm covers are diaphragms to control the venting of the crankcase gases. 6L Duramax decreases the chance engine runaway that can be caused by oil vapor that travels through the crankcase breathers and into the intake system. Oil blow-by from the crankcase vent tube often indicates a faulty PCV valve or excessive crankcase pressure. 6L Duramax engine's performance and safety with the PPE Crankcase Breather Filter Kit. How do I tell if I have LB7 by looking at the engine? Is the leak something I can just tighten ? PCV Crankcase Breather Repair Fittings (set of 2) 2004. 6L V8 engine has a cast- iron block with an aluminum alloy crankcase and cylinder head, 4-valves per cylinder (32 valves total), wastegate controlled turbocharger, gear driven water pump, and an electronically controlled Bosch common-rail (CR Mar 25, 2016 · Reading about he deadly blue smoke at idle, this came up as a possible cause. Threw a p0093 code once when i was driving it back to shop up a hill. Jul 27, 2007 · The whole point of PCV is to keep crankcase combustion gases (blow-by) from venting into the air by sucking them back thru the intake. It was an all-new engine developed by Isuzu, of which GM owns 37%. Your truck is a 2004, not a 2004. Fits: 2002 thru 2004 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7 Duramax Diesel *Check pictured diagram to confirm part number and call out number* *Federal Emissions engines (FE9) only* Replace your worn out positive crankcase ventilation hose/s. Kit includes 2 billet machined aluminum crankcase breathers, Filter Assembly, Hoses, Clamps and Optional Check Valve. Uncontrolled fueling of the engine is extremely dangerous. 35 this basically happened over night truck was running fine yester until i started it this morning and heard my injector knocking what im Jan 22, 2017 · Deleting my Cali LB7 . . The rubber lines from the valve covers tee off and plugs in just to the lower left of the alternator. 5 courser c/t, H2 rims, Orange track bars 2003 reg cab RED turbo-10 18inch kmc condors and toyo lowpros, lowerd 4 inches, caddy taillights shaved tailgate, colormatched everything,Pioneer Premier cd player, digital audio amp Feb 4, 2013 · I think you are confused. Fresh air from the throttle body is supplied to the crankcase, mixed with blow-by gases, and then passed through a crankcase ventilation valve into the intake manifold. 6L LLY LBZ LMM Duramax Silverado & GMC Sierra 2500 3500 4500 HD diesel Shop 2004. Shop at DmaxStore for your Duramax needs. Has not thrown a code since even with all the testing. jlfpyly5nhloibzqzcowya2s6lqyjpdi1pdhtlgvml5ualswl