Major Oil Consuption

Diesel Max

93 F-250 4X4 - 7.3
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I just bought a 92 F250 with 144K original miles. It has the 7.3 with the aftermarket Banks sidewinder turbo kit and transmission controler. I know this is going to sound impossible but here's the problem. I drove the truck just under 300 miles and it used 7 quarts of Delo 15w 40. Here is what I have found so far.

1. Truck is dry in the engine compartment and underneath, no leaks or wet spots anywhere.

2. No oil in engine coolant, radiator or over flow bottle.

3. No water in oil or on dipstick

4. No engine oil in transmission, although I don't know how it would get there in the first place.

5. No signs of oil in tail pipe, no oil dripping out of exhaust system any where.

6. Truck shows a very, very light blue smoke when at idle, however does not smoke driving down the road at a steady speed or deceleration

7. Truck has fair amount of black smoke under acceleration or pulling a hill

8. Turbo spools and whistles and shows very good power, turbo gauge seems to work normal.

9. Truck seems to run and idle fine (smooth, no knocks or abnormal sounds) and doesn't seem to have any loss of power

10 Pulled the lid off the air cleaner box, filter is clean, no oil on it or in main part of the box.

11. On the side of the air box, there is some kind of round, grey valve or diaphram that has a hose that connects from it to an area right below the engine oil fill cap. There was a small amount of oil comming out of that valve and dripping into the air box.

12. At the rear of the air box there a 90 degree rubber hose that goes into the inlet of the turbo. There was a small puddle of oil in the bottom of that hose.

13. My son followed me for 300 miles (basically right on my bumper the whole time) and there was no oil on the front or winshield of the car he was driving (seems as if it was burning that much oil, it would have been blowing out the tail pipe all over the back of the truck and front of the car he was following me in)

14. There is no oil leakage any where around the turbo or oil lines connecting to the turbo


I have done my best to give all the details and I know this sounds like I'm on drugs or impossible but it happened and has me freaked out. Sorry this is so long but I know the folks on this forum can't help without details. Can someone please help me and tell me what to look or how to diagnose how or where this oil is going. I know most all diesels burn some oil but at the rate of 7 quarts every 300 miles, I'll be spending more $$$ on oil, then on diesel fuel !!

Thanks for your time. ANY help would be appreciated.
 

icanfixall

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That gray tuna can looking thing from the front of the motor to the intake is called a cdr valve.. Crankcase depressurizing regulater. It vents the blowby into the intake path. Usually these cdr valves are found behind the intake and flow from the valley pan into the back of he intake... With the Banks setup you can't use those ports. The turbo oil drain back line in now in the valley pan port and the cdr draws off the front of the injection pump gear housing. Replace the cdr and you will probably stop burning so much oil. Some members actually burn waste motor oil as fuel. The motor wil burn it easily but it will coke up the precups. The cdr is a Ford or International part only.You wont find it at any chain autoparts stores.
 

reklund

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X2 on replacing the CDR Valve. It's likely stuck open, and your sucking oil vapor right through the turbo and into the intake all the time. 7 quarts seems excessive, but with the turbo "sucking" the vapor, it could happen I guess.

Also, not to sight the obvious, but you are checking the oil as per the owners manual, right? It says specifically to check it at operating temperature about 20 minutes after engine shutdown, on level ground. Lots of people I've talked to tend NOT to follow that procedure, and end up overfilling, and thus, burn oil excessively.

Ryan
 

FordGuy100

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Yeah but it should have showed signs of burning oil if it went through that much. So to me that rules out the CDR throwing oil into the intake.
 

RLDSL

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The part you will need is E3TZ-6A665-A "Adapter assembly for Crankcase Ventilation" Whatever else you find, you can bet that the thing is either long overdue for service or shot anyway, so go ahead and get one.
Be sure and check the oil as mentioned. If you fill it to the line cold and check it right after stopping and fill it to that line, you will be overfull by a qt or 2 and any amount over full gets burned off in a hurry.

If all this checks out ok, the rings might be getting sticky and it could be due for a couple of treatments of auto RX
 

91f2504x4

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I think on my last 300 mile trip my truck burned close to 15 gallons of oil and I had no signs of smoke or oil out of the exhaust LOLLOLLOL .

You might want to also check your intake post-turbo to make sure you dont have a seal in the turbo that is bad and dumping oil into the intake.
 

Diesel JD

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I knew a mobile mechanic that had a worn out F450 IDI turbo like that. It went through 6 quarts/200 miles he said, yet it had great power, ran good, sounded good, etc. Made me quit whining about my quart every 500 miles or so at the time. It could be just the rings are worn the heck out, but it's not weak enough to be a problem yet or it could be something CDR related as mentioned. How much blowby vapor does this thing have when you pull the filler cap?
 

Diesel Max

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Thanks for the help everyone. I will order a new CDR when I get back from vacation. I haven't actually had time to pull the hose from the CDR and didn't think about removing the oil fill cap to check the pressure. I only had the truck for 2 days and am now on vacation away from home so I won't be back until next weekend to mess with it. If there was that much pressure and blow by, wouldn't it be blowing oil out the oil dipstick tube, since that is not sealed tight ?? What would you guys recommend for an additive to help with the rings and cylinders ??

Thanks again for all the input.
 

Diesel Max

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Thanks for the help everyone. I will order a new CDR when I get back from vacation. I haven't actually had time to pull the hose from the CDR and didn't think about removing the oil fill cap to check the pressure. I only had the truck for 2 days and am now on vacation away from home so I won't be back until next weekend to mess with it. If there was that much pressure and blow by, wouldn't it be blowing oil out the oil dipstick tube, since that is not sealed tight ?? What would you guys recommend for an additive to help with the rings and cylinders ??

Thanks again for all the input.
 

RLDSL

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What would you guys recommend for an additive to help with the rings and cylinders ??

Thanks again for all the input.
See above, check out Auto RX. not an additive but a cleaner . will require a couple of treatments for an old diesel . I[ve brought a few back from near death with that stuff I;ve had old diesels that ate a qt every less than 30 miles that have been brought back to normal with the stuff. It does the trick providing that is what the problem is.
 

Diesel Max

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Can you get the auto rx at an auto parts store or do you have to order off their website or directly from them ??
 

RLDSL

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Can you get the auto rx at an auto parts store or do you have to order off their website or directly from them ??

Only from the website. Read the instructions carefully ( which is why they only sell it from the website ).
 

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