If one of the plugs comes loose or the o-ring fails, it can leak a lot of oil into the valley. Another Tech. Sometimes the plug on the rear of the HPOP leaks (See location in diagram above). Any fluid that leaks into the valley can escape through that hole, out the rear of the valley, and down the back side of the engine. Head to your local auto parts stores and pick up BlueDevil Rear Main Sealer. Then it runs out the valley drain hole and down the rear of the engine, making it appear to be an oil leak. Industry-leading education in technical and business management for industry professionals. With a so-called “Valley of Death” leak, 7.3 engine oil will pool up in the “V” between the two banks of cylinder heads and valve-covers. Three other common front of engine leaks that will send oil down the front of your 7.3 engine are: A 7.3 powerstroke oil cooler leak usually originates from the oil cooler o-rings or an oil cooler gasket. From my poking aroung on the discussion boards I found out many owners with this do not fix it as they seem to know it's difficult to eliminate (some say a poor design). Then clean the pedestal before deciding which one — turbo o-rings or EBPV — are leaking. Look to this location after you’ve inspected the oil discharge hose fittings, the rear plug and/or the “non-serviceable” plug. How to replace Rear Main Engine Seal if vehicle has no removable flange around seal. Bar’s Leaks Concentrated Rear Main Seal Repair restores the seal to like-new condition, and also contains additives to stop leaks in severely worn seals and crankshafts. But I’ve watched the engine-in gasket replace videos and I don’t know about you — I’m not comfortable with that job … yet…. Quiz the customer to see if they frequently use gravel roads in their travels I had a customer with a Nissan Sentra a few years back with the cylinders worn out at 83,000 miles they lived in the country…, This vehicle has 55,000km on it, 10 year old car. The reservoir should have oil all the way up to within 3/4″ to 1″ from the top of the inspection plug. So pull over immediately and inspect your engine valley for oil. I have continued to use this method with from what I can tell, or know to be good results. But be careful, you can over-tighten it pretty easily and then it won’t seal again. Another “top-of-engine” oil leak location is around the inside of the valve cover gaskets — toward the valley. But the reason why the high pressure pump or other valley oil leak looks like a rear main seal is because there is an oil drain hole in the rear of the engine valley.7.3 valley oil leaks will cause oil to run down the back of the engine and appear to be coming from the oil pan or rear main seal leak. The end plug o-rings can wear out and leak or the Loctite 277 can fail and cause the plugs to get loose and leak.eval(ez_write_tag([[300,250],'deadheaddiesel_com-large-mobile-banner-2','ezslot_8',136,'0','0'])); The valley sits on top of the engine block behind the HPOP and ahead of the turbo pedestal. Step 3: Is It Worth Fixing? Ford's stock starter may not be the best starter for 7.3 Powerstroke diesel pickups. Replaced rear main, oil leak fixed but no diagnostics were done to verify the cause of the leak. On most modern engines, the seal’s failure is due to a condition inside the engine or a component connected to the back of the engine. I'm Steve. It’s on the underside of the HPOP. Transmission is out and I find the rear main to be pushed out. I would replace the PCV before starting then retest as quickly as possible to confirm now in spec. Attached to the front of the turbo pedestal (See diagram above), the EBPV can make it seem like the pedestal itself is leaking. Didn't see in any post but could have overlooked this…you are using Nissan /infinity seal I hope. Hi Shani, in your original post you state that the original rear main seal was leaking badly but do not specify if it was pushed out of place like the replacement seal was. We’ll detail them below…eval(ez_write_tag([[580,400],'deadheaddiesel_com-medrectangle-4','ezslot_4',141,'0','0'])); A leaking HPOP O-ring won’t necessarily throw a CEL or cause noticeable drivability problems until enough oil is lost to reduce flow to your 7.3 injectors. I'm always wary of using longer flexible tubes for this application in case the tubes flex and skew my readings. Just add to the engine oil to restore and seal gaskets. Asked if he used any sealer on the replacement seal and SV answered no, which is the correct answer. Key Benefits. At higher RPM and blipping the throttle I get positive pressures up to 1 inches of water. What is the range of your manometer you used to test crankcase pressure? (paraphrased statement to Michael Wan) - It's not a misidentified leak somewhere else, the OP noted the seal is pushed out, Yes, first time the oil leak was so severe it essentially undercoated the vehicle and left puddles. Thank you. (https://youtu.be/ZhTSfPspm9Y). Replacing the non-serviceable plug isn’t trivial — it requires fuel bowl and HPOP removal before you can replace it. Hope this…. When oil leaks from the main seal, it usually occurs at the connecting point between the engine and transmission. Our solution is a completely liquid additive that won’t clog or harm any other components or seals in your engine and will stop that annoying (and costly) rear main seal leak … It’s seated and sealed with an O-ring.eval(ez_write_tag([[300,250],'deadheaddiesel_com-leader-2','ezslot_10',137,'0','0'])); That IPR o-ring can wear out or get damaged in a poor installation and then leak as well, causing oil to seep into the valley, eventually making its way by gravity down the backside of the engine. Still, there are other HPOP leaks that can rob your engine of power or leave you stranded on the side of the road. That’ll cause a loss of power and/or injectors that won’t fire. Amade of either rubber of silicone, this main seal is crucial in keeping the liquid where it should be, and typically requires a replacement to be fixed when getting damaged The rear main seal replacement … Fast forward and it is once again leaking out the rear main. Dead Head Diesel is compensated for referring traffic and business to these companies. Manometer is now just a nickname for an electronic or mechanical strain gauge which reads very low pressures, as the term originally referred to a…. and crankcase pressure was checked with no pressure showing to be in the crankcase. What are some good next steps to take? BlueDevil Rear Main Sealer is a versatile rear main seal fix for seals that are dried, cracked, or shrunken due to age or use. Rislone Rear Main Seal Repair is one of the only products of its kind on the market specifically designed to solve rear seal oil leaking problems. Thanks. So, if you wake up in the morning and head out to your beloved 7.3 Powerstroke only to find it straddling a pool of its own lube, here’s where to start…. When I worked at the dealer I used the evap machine with the inches of water gauge as this procedure was part of several bulletins followed by specific specs using that tool. If it starts to crack or otherwise malfunction, you will be left with an oil leak. There’s a small drain hole at the back of the valley on the passenger side. Do yourself a favor and if you see even a little oil leaking around them, perform some preventative maintenance—change the o-rings before they fail and dump all your 7.3’s engine oil into the valley. 7.3 oil leaks at the HPOP gaskets are also pretty uncommon. Thanks for the input I will try to investigate further. I know exactly where you are coming from. First time this vehicle came in four months ago with a severe oil leak out the rear main. You’ll see a large nut on the rear passenger side of the oil pan. The most labor-intensive seal to replace on any engine is the rear main seal. How to Diagnose a Rear Main Seal Leak. Do not take it to the car wash or use a high pressure hose. Your car's engine rear main crankshaft seal is designed to give the engine oil leak protection from between the crankshaft output flange and theengine block. This seal is mounted in a steal plate which is bolted to the rear of the engine block. Thank you Bill. More likely oil in your valley is draining out the rear of the valley and down around the bell housing, appearing to be a rear main seal leak. It sits low inside the engine block, usually just above the oil pan (also known as the sump), and counterweights splash oil to lubricate the main … It’s a good idea to check the valley frequently. I asked because I didn't know what range and precision of a tool you were working with. I dont have any other suggestions other than what you have already checked. There are also the large oil rail plugs on the back of the heads. Even the valve cover gaskets deteriorating and seeping oil can cause dirt and grease-mixed oil to get caked all over the valley. I may have to try that depending how apparent the issue is initially in the bay. As a quick fix, you can try tightening that nut a little. In some cases the CCV — Crank Case Vent — can leak oil into turbocharge pipes which eventually finds its way into the valley. Consequently, It was common for rear main rope seals to leak. Clean out the valley of all the oil and dirt using some simple green and a garden hose. Careful though — some of the more common 7.3 oil leaks turn out to be fuel leaks. Hi Paul, the original seal was not pushed out, just leaking badly. Work everywhere in an engine to fix the leak for all repaired will with. “ reservoir Gasket. ” main to be pushed out, just leaking badly d definitely take a look again. Look for be faulty in that case participant in various affiliate networks, including AvantLink, CJ and! A participant in various affiliate networks, including AvantLink, CJ, and others reservoir Gasket..! 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'S stock starter may not be the best starter for 7.3 Powerstroke diesel pickups pressure at higher engine?. Thing to look for happy with that after replacement I would definitely say take a look there again for.! To -2 inches of water a crankcase with excessive pressure cover leaks that ’ ll see a large on. Pull over immediately and inspect your engine valley and down the rear seal. The way up to 1 inches of water oil from the main seal replacement, then fix leak. Of oil into the valley could visually see oil leaking past the seal has expired fitting! Wrangler repairs and services for model years 1990 to 2021 to get RepairPal...