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Don't know what else to do!!!!!!!


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I've been haveing this awful problem with my EA81T smoking really bad out of the exhaust. Huge, thick clouds of smoke. I've done everything that I can think of to do. I replaced the heads, with brand new ones. Then I replaced the turbo, still smokes. Today I tore down the block, the rings, pistons and cylinder walls are all in excelent condition. There is no scoreing, scratches, everything is within round. I can't find anything wrong with the engine, nothing at all!!!!! WHOT ON EARTH CAN IT BE!!!!! I"m burning through at least 6 quarts of oil a week, sometimes more if I go out of town (out of town meaning the 10 miles to the next town).... AAAHHHH!!!!! I'm pulling my hair out here!!!!!

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There aren't any emissions on it, no PCV or anything like that. No oil in the intake, anywhere. It's not like it's buring the oil, there aren't any signs of it on the pistions or sparkplugs, which usually foul up pretty bad when there is oil in the cylinders of any amount.

 

Where did I put the new turbo? In the stock location.

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First of all, I'd have to agree with one of the questions. Was the replacement turbo ne or rebuilt. I had a 1985 Volve 740 and was cheap about it. I bought the cheapest turbo I could find, and it leaked. I basicall burned the oil thru the exhaust side and it smoked like a Banchee.

 

Send , make sure the valve seals intaked. With time(age), the rubber hardens and no longer seal. Lot of oil will be burned via the valve guides or seal.

 

Third, I hate to say it but I get lazy and I never check the truness of the cylinders. I usually just throw in a new set of rings and have way better compression, but reality is, that the new rings will never mold into the cylinder walls well, if the cylinder is out of round. This will in effect cause you to burn oil, but in so small amount, that you won't notice it at the plug inspection, but you will notice it at the pipe.

 

Last but not least, oil can accumilate in the exhaust ( if this is an automatic transmission/ thus tranny fluid) via a bad vacuum modual. This is what usually control the shift pattern on some automatic trannies, with the aid of vacuum. Since full time vacuum is at the tip of the vacuum modulater, if it gets a ripped diaphram, the engine will in turn start sucking up the tranny fluid vapor into the intake, and burn oil.

 

Just my 2 cent. Good luck Hugo/So. CA

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Ok so you are burning oil then. There are three ways I can think of that subaru can burn oil. 1 is bad valve guide seals in your case severely bad seals. or 2. Bad oil rings. you said you looked at them. Did you replace them? and possibly 3. PCV system is drawing oil into the intake. I'm thinking about the ea82s did that on long turns. I would also check to see if your air filter is dry or is covered in oil. Other than that it shouldn't be anything else.

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Many years ago, I have a Mitsubishi Lancer Turbo that replaced by a secondhand Japanese engine. When it came out of the garage. It look like it have a boiling water pipe at the rear end. Lot of white smoke. That problem was solve by using Mobil I oil. But it still consume oil. I have to put oil in every time I go to petrol Station. The problem is the loose turbo drive shaft that burn and let the oil into the exhaust pipe and burn out into the exhaust. The Mobil I only have higher burning point that don't create smoke but still burning the oil away.

Chu

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I checked to see if it was throwing oil out of the turbo it's self. I pulled off the crossover pipe, and the smoke is comeing directly out of the heads, so it's not coming out of the exhaust side of the turbo. I also laid a piece of cheese cloth between the turbo unit and the metal intake tube, ran the engine for a few, at all boost levels and rpm up to 4500, pulled out the cheese cloth, no oil there. Are there oil galley's in the head that if there was a crack into that I can't see, can it be pumping oil into the engine?? If there is a crack then I guess I need to get on the horn with AHR!!!

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Actually, I have been here for some year but the new board erases all my past record. If Adam still remembers the ground effect I want to buy from him then I am the one.

The turbo have a small pipe in the middle of the turbo body feeding oil to lubricate the turbo drive shaft that spin in very high rpm, The shaft is locate between the intake and exhaust and is separate by bush. If the bush of the turbo shaft is loose. The oil can split into both intake and exhaust. The oil got into the intake will burn in the cylinder and you have a mixture of fuel and oil. The oil got into the exhaust will burn by the red-hot exhaust down pipe and it may be reason why you have so many white smokes.

Chu

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From what all U have done, and the plugs are dry but still geting all that smoke, if it's not coming from the turbo I would say that U must have a VERY bad valve guide seal on 1 or all of the exaust valves. This would let the oil into the exaust port, but little if any into the cyl. So U would end up burning hella oil without fouling plugs or having low compression. And if I read your post right, U are getting oil into the EXAUST sys. somwhere before the turbo. To me it indicates that the heads wer either rump roast. wrong, or if they are simply good used units, that the last engine they wer on had a pluged cat and bunt up the seals on the exaust side only.

Hope this helps, I know U been trying to fix this for a while now:-\

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Ohkay, I got a good nights sleep, and calmed down. I've rebuilt many a motor and modified most of those. I've fixed more cars than I can currently count of everything I can think of. Built one of the baddest Brats on the west coast, why shouldn't I be able to fix this little problem on a stock motor!!!

 

I've got new rings going in, the heads are new from Aluminum Head Rebuilders in Portland. The pistons are in great shape, except for a little carbon build up on the top, and varnish on the bottom. But After I cleaned them, they looked basically brand new. I'll see if I can find the hoses for the PCV and hook everything up again. Someone got a diagram of how the PCV hoses are routed on an 84 EA81T??

 

I hooked up the turbo to the oiling system on the Brat, and spun it with a vacume, just so I could get a good visual of everything while it was working, no oil coming out where it's not suppose to, the turbo unit is off an EA82, Thanks Ed!

 

I guess I'll jes get back to ya'll when it's all put back together, and let ya know how it is.

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Well, I found just found a pretty good sized problem. My number 3 piston, when I was pulling off the rings, I got the two compression rings off, then something fell out. I looked down and there is this little crescent piece of aluminum. The ridge between the rings was broken, and looks like the only thing that was holding it together was the rings, or the cylinder wall or something. I didn't see it when I just looked over the pistons last night, but in taking it apart, it fell apart. Grrr. How much do pistons run for this engine? Where is the best place to get them?? I tried the local parts stores, and they show the same part numbers for the N/a and turbo engines. That ain't right!

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Even though I think Redlance figured out his problem, this is a good indicator of what can go unseen and still look good. I am with Andy, cool, another perspective from a lot closer to where they make our cars, or made I should say.:banana:

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Ohkay, I got the stuff today to put the motor back together. With the exception of a couple of gaskets (oil and water pumps). But I've got the rings and pistons for it. With any luck, I'll be up and running by this weekend. Hope so, cause I want to hold a little mini meet of the Rogue Roo's this weekend.

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