Discussion Starter • #1 • Jun 18, 2010. This is freaking me out! This is due to engineering. This time I had oil everywhere including my back. It's always burnt and blowout 1 gallon of oil after oil change, then it was fine. blowing oil out dipstick. Then get a glass of water. Squirt two shots of automatic transmission fluid into each cylinder and run the compression test again. It does not have a pcv valve for me to - Jeep 1994 Wrangler question 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. If they designed the piston for a snug fit when the engine is cold, the piston … Engineers have to compensate for the differences in temperature expansion. By the way, I didn't exceed 25 mph to the store and back and drove at normal engine speeds. Now look at the level the oil reaches. Pressurizing your crankcase to the point of popping the dipstick out can only come from one place. If your diesel's gone from oil burner to oil spurter, then you'll need to find the cause before something worse happens. Then just hope you don't start blowing out other seals! The PCV system utilizes a PCV valve to catch oil and keep it from going into the engine; if the PCV valve malfunctions or the filter clogs, then excess pressure will build up in your crankcase and push oil out of a submerged dipstick tube. Here is some of the possible issues, 1. It's got the Kubota diesel engine in it and it's never had any blow-by and always ran great. Thread starter apw; Start date Sep 23, 2015; A. apw Forum Newbie. Vocational, Technical or Trade Scho. If the oil reaches … Worn rings on one or more cylinders. Locate the oil dipstick in the engine bay and remove it, wipe it clean with a cloth, and then reinsert it and remove it again. All of a sudden, the engine started blowing oil out of the dipstick tube. The pressure can't be relieved through it's normal avenues, so it pushes itself out of the dipstick tube. The PCV valve could be bad. Usually it is because there is too much crankcase pressure. Joined Sep 23, 2015 Threads 1 Messages 1. With the engine warmed up and running, take out the dipstick and slip the hose over the dipstick tube. cpurvis Lawn Addict. 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. At rpm above 3500 (on road coarse) engine oil starts to blow out of dipstick tube. Can you hear the ball bearing inside? Your engine should not be blowing oil out of the dipstick tube. But from what I can tell I I am now blowing alot of oil and smoky air out of the dipstick. Your idea of a bad turbine seal sounds possible from the way you described all that excess crankcase pressure. 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. Cat Engine Expert. So if the oil dip stick is not secure the pressure of the oil in the engine (when the engine is running of course), will force the oil out of any low pressure area, in this case the dip stick tube. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, "Hayne diesel Tech Book Engine Repair Manual: General Motors and Ford"; Ken Freund"; 2007. Changed the cdr and washed of the entire underside and the engine and it appeared to be dry and drip free after a 15km drive, whereas it would be wet and dripping good far before that before. As the engine warms up and the higher the rpm the more oil is blown out. Like people, engines do all sorts of strange an inexplicable things when something goes wrong. could it be a stuck or broken valve? That is an awful lot of air moving and it is going to take the path of least resistance to balance the pressure caused by that 60 cubic inch change in volume. Oil temps reached 230, trans 193. Cylinder compression check and leakdown test by GM dealer mechanic who stated the results were good and not an indication of blowby. Too far away and it can't create the vacuum to properly work the CDR. I bet if you take and crack open the oil fill cap it would make a mess blowing oil all over too. If crankcase pressure builds up and the dipstick tube is submerged in oil, then oil will push its way up the tube and out of your motor. It only blows out the dipstick tube when the Jeep is actually moving down the road. An open dipstick tube pokes a little way down into your block, but likely not past the bottom of the block casting and certainly not into the oil itself. The engine has 142 hours on it and the first oil change was at 25 hours, the next at 50 and then 100. New working PCV valve. Nowadays, a light comes on when the oil pressure is low. 2. I was thinking I had left the dipstick undone and that the fluid spurted out (like the oil would), but now I understand it shouldn't spurt out even if the dipstick is ajar. 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. When heated, aluminum expands faster than steel. of turbo inlet. Than I noticed the transmission dipstick was sticking out just enough for the rubber stopper to clear and allow 1/4 gap. I can do nothing to cause oil to blow out the tube sitting still. For a better experience, please enable JavaScript in your browser before proceeding. Metals expand at different rates. This is especially true when the motor has a few miles on it and the pistons rings can no longer adequately seal the combustion chamber. In all but the last case I find the dipstick still in the tube but it is not seated and is blowing oil out. The PCV system uses vacuum from the engine -- or turbo, as the case may be -- to pull pressure out of the case and back into the motor. Any idea what … read more. I see that the guys here was talking about the 426 engine. Diesels generally experience much higher combustion chamber pressures than gas engines, which makes them more prone to blow-by. Oil dipstick tubes come in two types, submerged and open. I tend to think it happened fairly quickly and don't think any overheating to much extent occured. An easy way to cause oil blow-by issues is to accidentally overfill your engine with oil. What else can I do to be sure of the problem. 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. How close to the turbo inlet is the CDR hose? Owner - Twisted Steel Performance Coating. Some non-submerged tubes poke out of the block casting and hover just above the expected oil level. Right in that area, everything had been sprayed with trans fluid. All motors have a cretain amount of piston blow by. The oil will seal the rings a tad better which will raise the compression slightly. Distance is about 8-9" but dosnt seem to be an issue right now. If yes, put it back in, its likely fine. Pulling them real hard builds up crankcase pressue and blows out the engine oil filler cap. And I know I got the intake plumbed properly as it's on the filter side. When metal heats up, it expands. Now I assume this somehow to do with the fact that I just did the PCV reroute on my truck, I dont think I did anythign wrong with the install. Get a few feet (3 or more, give yourself plenty of room) of CLEAR rubber hose that will fit over the dipstick tube. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. As for blowing oil out the dipstick consider the fact that on a single cylinder 30 Cid engine the volume of air in the crankcase changes 60 cubic inches every revolution due just to the movement of the piston. Recently however, I've noticed if you take out the dipstick while it's running, it will start to spit oil out of the dipstick tube. I have a 1994 Jeep Wrangler S 2.5ltr. SOURCE: Oil blowing out the dipstick tube a fairly common problem on any of those high mile or abused 4.0liter engine either #1 your PCV ventilation tubes are plugged those are thos small black lines comming out of your valve cover or #2 your getting really bad blow by in … I'm hoping to replace the whole machine in the spring, but it looks like for now it's gonna be another busy winter with it doing snow removal. Engine is big cam3, 350hp cpl840. Do you have a breather? Rule out the simple stuff first. I bought it and it has been nothing but problems. No milkshake, no fuel in oil as far as I can tell. we removed the breather on the valve cover and it is doing the same thing. A submerged dipstick tube goes all the way down into the oil sump and sit submerged in oil at all times. Do you recall the old days when every car had a oil pressure gauge on the dash board? I have a C-15 and the dipstick keeps blowing out and blows oil all over, 2007 Kenworth, I changed the crankcase filter - Answered by a verified Technician . A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Make sure that this tube is free from any obstructions. 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. Pushes itself out of the possible issues, 1 your engine should not be blowing oil the... As the engine started blowing oil out due to visible gases in the head... 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