excessive blue smoke, then no start - Ford Powerstroke Diesel Forum

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post #1 of 24 Old 04-15-2013, 05:01 PM Thread Starter
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excessive blue smoke, then no start

I have a 2002 7.3 auto. I put a rebuilt engine in a while ago. It has 10k miles on it. the truck has 60k miles. Right after I installed the GQSSB and did the CCV mod (both same day), the seemed to be dumping blue smoke out the exhaust. I took an 8 hour round trip this last weekend with no issues. Today I jumped in the truck and it started ok, got a mile down the road and it ran rough and died. then started a second and died. I had to crank it a long time to get the oil pressure guage to move indicationg oil pressure. I waited 8 hours and went back. the truck started, I drove it almost back home and i died again. It didn't have any power. I thought CPS sensor first, so I switched one in that I had laying around (dont know for sure it was good). It did not make a difference. I thought about the long cranking a bit more and finally decided to check the oil.... no oil is on the stick. Thats where I am at. Tomorrow I was gonna go get some oil and fill it up. Maybe the damn thing is so low the lpop isnt supplying the motor with enough pressure and shuts down.

Does anyone think the turbo/ccv mode would make a difference in burning more oil? Not enough back pressure? I tried flipping the oil fill cap upside down, and it didnt blow off, but it wasnt wanting to just sit on there to good. Thanks in advance for any input. Ken
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post #2 of 24 Old 04-15-2013, 05:13 PM
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Blue smoke=Burning oil... No oil on the dip stick is Very bad! Id put oil in it and see where you stand afterwards... Hoepfully it didnt hurt anything!



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post #3 of 24 Old 04-15-2013, 05:14 PM
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Neither of those would cause a loss of oil. Not touching the dipstick is at least 2 qts low. Checking fluid levels is something that should be done regularly, like during fill ups. If you aren't noticing a huge puddle underneath your truck, it's likely a slow leak. The blue smoke you're seeing could be from the lack of oil creating too much heat on your internals. Clean up the engine, do and oil change, look for leaks. Just looking at best case for you. Worst cast will involve an engine over haul as the internals are completely shot. I don't recall if injector cups will dump oil in the cylinders, but if that's the case, I suppose that really would be best case scenario as it's a cheap enough fix.

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post #4 of 24 Old 04-15-2013, 05:34 PM Thread Starter
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9 months ago I put this motor in the truck. All new gaskets. was rebilt by someone? bought the rebuilt longblock from a guy on the forum. I replaced the injector cups. There are no puddles under the truck. I did the CCV mod and have it just dumping next to the trans like the old international 4700 series trucks, That thing seems to smell like oil a bunch and puff fumes pretty good. I guess I didnt think I would need to be checking the oil that often, but definently should have if I was seeing blue smoke.
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post #5 of 24 Old 04-15-2013, 05:40 PM
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Whenever you see blue smoke, you should always check the oil... It can disappear very quickly.



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post #6 of 24 Old 04-15-2013, 05:46 PM
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I understand it's a new motor, but it's mechanical and things happen. I've made a habit of checking fluids all the time, but I grew up driving 40 year old hunks of rust held together with JB Weld and spray foam. Good, bad, indifferent, I make routine checks, and I've still blown an engine cruising down the freeway.

But yet, do the oil thing and check back with us to let us know what's up.

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post #7 of 24 Old 04-15-2013, 06:05 PM Thread Starter
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Will do, I appreciate the input
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post #8 of 24 Old 04-15-2013, 09:11 PM
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Burning oil can typically be three things.
1. Piston rings are worn. Do a compression check
2. Internal turbo seals. Kind of hard to really check for sure while it's on the truck unless it's really excessive on both sides of the turbo.
3. Bad injector that is stuck open on the hpop side. CCT and a buzz test will lead you in the right direction.
4. Could be valve seals but not real common. Especially if your burning a lot of oil. Do a leak down check.

Injector cups are only to keep out the coolant.

Hopefully you didn't do too much damage running too low of oil level.

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post #9 of 24 Old 04-16-2013, 01:35 PM Thread Starter
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Today I filled it with A LOT of oil and it ran fine, but just blew some blue smoke. After looking more into what was going on I found that the valve cover, dip stick tube at the pan and top of motor, and the turbo drain pipe are all leaking oil really bad. On my trip the truck must have started leaking all this oil. Some how the oil system has more pressure than it should. Please let me know your thoughts. Ken
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post #10 of 24 Old 04-16-2013, 02:23 PM
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I hope you mean by "ALOT" of oil you didnt over fill it!!! LOL!



Tom

5" MBRP Straight Exhaust w/ 6" tip, SCT Monitored, Limo Tints, 20" LED Lightbar, 8k HIDS, & Some other goodies
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