1993 7.3 diesel losing oil some how , where is it going????????????

[benbo0407]

hi i have a 1993 7.3 diesel crew cab, with 114,708 miles on it, im having this problem with it where i am losing oil in it, went and got my oil changed in it at about 113376 miles on it, drove around for about 2 weeks and went fishin last weekand with it, drove about 30 miles from home pulled up to a stop sign and my oil gage was going all crazy i had to fill up with diesel so i checked the oil there was barely any oil on the dip stick, so i topeed it off, with about 5.5 quarts is what it lost, so then i drove another about 170-200 miles to the fishing spot, bought 2 gallons of oil at wal mart , pulled over at the camp site to check oil again and lost about 2 quarts, so i topped it off , drove around the town for the weekand about 30 miles at most, then drove home and end of weekand 180 miles back home, and drove to work , lunch , and back home, for only 3 days after the trip and i had to fill up my oil again, which is today, so then i drove about 30 miles away from work and about 20 miles back home so about 50 miles and i already lost about a quart of oil after filling it up today, now the weird part is there is no oil spots in my drive way , and when i drive it doesnt look like its burning oil, only time i see smoke is when i start flooring it and thats black smoke, now in the morning i do have a little hard time starting it if i dont plug it in,and there is some white smoke coming out while trying to start it but once fires up and [censored] load of smoke comes out with a mixture of bluish kinda, its takes maybe 3 key turns to fire it up, about a minute and half or less, but i dont have any problem starting after its warm, but if its plugged in then itll fire right up in the morning, my question is where is my oil going?????????????????????????? why hard starting in morning if not plugged in the night before??????

[cdnsarguy]

Have you checked your coolant for oil........ check your oil hot.

By.........DieselDon

Oil consumption, and the proper checking of the oil levels in Ford diesels comes up periodically. Ford dipsticks are calibrated for hot oil. The 10 quarts in the IDI engines expand about 1/2 to 3/4 of a quart as the oil heats up, and contracts the same amout after cooling. If you check the oil first thing in the morning ( which I grew up doing ) the engines will all indicate oils level below full, but when checked hot, will ( after a 10 minute drain time ) the oil level is usually at full. If you are checking the oil cold, and keeping the level at full, you are actually over filling the engine which will burn of the extra rapidly.

Suggestion: Check oil hot after 10 minute drain time.
Don't add until level reaches add line ( 2 quarts ).

In my days at Ford this often cured, or at least improved, the apparent oil consumption complaints.

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Have you checked your CDR valve.........

Do you know when to service your CDR valve?

All 6.9L and 7.3L diesel engines are equipped with a CDR (Crankcase Depression Regulator) valve. Even the new 7.3L Power Stroke is also equipped with the same valve. The CDR valve is one of the leading causes of head gasket failure in these engines. The CDR valve is responsible for controlling the pressure/vacuum in the engine crankcase, and seperating the oil mist from the air and returning the oil to the crankcase. The CDR valve should be serviced every second oil change or when signs listed below are seen.

When the CDR valve is not properly serviced, engine oil enters the air intake and is drawn into the engine. The diesel engine will burn this oil as fuel, however, it is heavier and thicker than diesel fuel and, having greater BTU output, causes excessive heat in the cylinder. Due to the intake manifold design, most of the oil will migrate to #7 and #8 cylinders; the last two cylinders in the rear by the firewall. The increased temperature here will cause the cylinder head to lift off the gasket and allow water or oil to leak out the back of the cylinder head where it meets the block.

To check your CDR valve, remove the air cleaner hold down bolt and inspect it. If the bolt is covered with engine oil mist, it's time to service your CDR valve! Ford calls this item a "Adapter assembly for Crankcase Ventilation" Part number E3TZ-6A665-A or IH part #1805319C1


To service the CDR wash with a solvent, allow to dry, do not use compressed air to dry. There is a small hole in the CDR back cover, ensure it is clean and open. If black chunks of rubber are visible in the intake, on the screen then the rubber membrane has disintegrated, replace the CDR.

[benbo0407]

well i havent checked my coolant for oil, but i have looked at my intake and there is oil around the mesh and all that , ill take a look at it again and service it, thanks for the info,