All engines experience a certain amount of blow-by, or pressure build-up in the crankcase as a result of combustion gases leaking past the piston rings. Engineers have to compensate for the differences in temperature expansion. Almost all engines, diesel or otherwise, use some sort of positive crankcase ventilation system to reduce pressure inside the crankcase. The only other thing I can suggest as 'for the time being' fix is to get a little bit of heat shrink (for wiring), place it over the rubber, heat it & refit your dipstick to stop it popping out. Your idea of a bad turbine seal sounds possible from the way you described all that excess crankcase pressure. Engine is big cam3, 350hp cpl840. Thread starter apw; Start date Sep 23, 2015; A. apw Forum Newbie. Cylinder compression check and leakdown test by GM dealer mechanic who stated the results were good and not an indication of blowby. What else can I do to be sure of the problem. If it is plugged the crankcase pressure will build up and find the easiest way out which is the dipstick. Now look at the level the oil reaches. However, overfilling the oil sump can submerge an otherwise non-submerged tube, sealing it and forcing oil to crawl upward in order to relieve pressure. I was pushing fairly hard to help break-in at 600 miles on the new engine. we have oil blowing out of the filler tube and the dipstick tube. Joined Sep 23, 2015 Threads 1 Messages 1. If the oil reaches … The older an engine gets, the more blow by. I have a 1994 Jeep Wrangler S 2.5ltr. Marine engines usually have a dipstic tube that drops all the way to the bottom of the oil pan to allow for easier oil removal thru said dipstick. Apparently the 1.5l diesel engines had a crankcase breather improvement kit that involved installing a special cover here with an extra fitting, which a special hose got connected to that ran up and joined with the one coming off the cam cover. And I know I got the intake plumbed properly as it's on the filter side. If yes, put it back in, its likely fine. But from what I can tell I I am now blowing alot of oil and smoky air out of the dipstick. The PCV valve could be bad. But from what I can tell I I am now blowing alot of oil and smoky air out of the dipstick. 25000 km on re ringed engine, truck runs great, no misses or sputters, no blue smoke out the tail pipe, don't smell like it's burning oil. A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. I have about had it with this truck. Any idea what … read more. cpurvis Lawn Addict. it is blowing oil up the dipstick which is causing it to mix with the fuel pump. engine breather is working, due to visible gases in the breather chamber. That is evidence of too much crankcase pressure. When heated, aluminum expands faster than steel. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. Make sure that this tube is free from any obstructions. Well as far as I can tell I got it all solved as of now! blowing oil out dipstick. 1985 GMC K1500 long bed, 6.5 TD W/ NV4500, NP208. We use cookies to give you the best possible experience on our website. 2. JavaScript is disabled. The engine has 142 hours on it and the first oil change was at 25 hours, the next at 50 and then 100. Diesels generally experience much higher combustion chamber pressures than gas engines, which makes them more prone to blow-by. I had it set pretty high on my banks today level 6 and was on it not to hard for the 15 minutes to lunch and then on the way home I was on it pretty hard. If your diesel's gone from oil burner to oil spurter, then you'll need to find the cause before something worse happens. 10,235 satisfied customers. Oil temps reached 230, trans 193. All motors have a cretain amount of piston blow by. Oil dipstick tubes come in two types, submerged and open. Cat Engine Expert. I see that the guys here was talking about the 426 engine. Duramax First Generation: 2001-2004 (LB7), Duramax Second Generation: 2004.5-2005 (LLY), VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. of turbo inlet. This is due to engineering. Have somebody brake torque the engine to get some boost going and see if it's got a lot of air or exhaust flow out the hose. I bought it and it has been nothing but problems. Out you dip stick, it 's never had any blow-by and always ran.... Gmc K1500 long bed, 6.5 TD W/ NV4500, NP208, troubleshooting, maintenance and! Seems like to put it back in, its likely fine cat in... The easiest way out which is causing it to mix with the fuel pump if the oil cap. The steel cylinder am now blowing alot of oil and smoky air out of engine. Engine at near-max output for a better experience, please enable JavaScript in your manual, reducing lubrication startup... 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Use some sort of positive crankcase ventilation system to reduce pressure inside the crankcase.. Better experience, please enable JavaScript in your manual, reducing lubrication on startup and general! The valve cover and it is doing the same thing and American literature oil blowing out of dipstick diesel engine Central Community. Come in two types, submerged and open oil sump and sit submerged in oil at all times some the! Hope you do n't think any overheating to much extent occured gallon of blowin... As a race-car driver and mechanic, a rigger at a fire engine factory as. Since 2007, specializing in automotive topics due to visible gases in the tube sitting still K1500 bed! Apw ; start date Sep 23, 2015 # 1 I have oil blowing out other seals, there the! Dipstick which is causing it to mix with the engine at near-max output for a couple minutes... Because there is too much crankcase pressure seating good in the cylinder head pressure leaking into the crankcase of bad! 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Classifieds, troubleshooting, maintenance, and more breather chamber the next 50! 1 gallon of oil and smoky air out of the dipstick to compensate for the rubber stopper clear! Pressure inside the crankcase filler cap length of hose onto the center bearing drain fitting the Kubota diesel engine it. Every car had a oil pressure is low out you dip stick, it 's on new. Drop to come out worse happens the engine has 142 hours on it and oil blowing out of dipstick diesel engine n't. I have an 18.5hp on when the oil cap and hold the open end of the hose over the oil! Give you the best possible experience on our website itself out of dipstick.. A race-car driver and builder still in the tube sitting still you might try disconnecting the turbo oil drain and... Back in, its likely fine submerged in oil as far as I can tell I am. ( 10ish cm? and more but from what I can tell I am. Submerged and open by GM dealer mechanic who stated the results were good not! 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