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Extreme blue smoke flowing out of 1986 ford f350

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Your engine is burning oil. The usual causes are worn out valve guides and seals, broken piston rings, worn rings and scored cylinders which all amounts to an engine overhaul.

Posted on Jun 23, 2009


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2008 6.4 f350. blowing tons of blue smoke for the last 12 months

Blue smoke means burning oil. Black smoke means running too rich (too much fuel in the air/fuel mix). If it is blue smoke:
If it blows blue smoke only shortly after starting, it means oil is leaking into the cylinders from above, through the valves. This us typical of older engines, and can be repaired without removing the engine from the truck (although it is still expensive). A 2008 should not have this kind of problem.
If it blows blue smoke all the time, it is bad piston rings or scored cylinder walls. Oil is leaking from below up into the cylinders. This is bad news - any solution will require removing the engine from the truck and complete disassembly (i.e. a rebuild). No engine oil treatment will make it go away, regardless of what the label says.
It is very, very rare in modern engines for a well maintained vehicle with less than 100K miles to need a rebuild. Damage such as this usually comes from not changing oil AND the oil filter often enough. 3-4000 miles for conventional oil or 6-8000 miles for synthetics. If using synthetic, be sure to get a high quality filter designed to be effective for the synthetic oil change interval.

Nov 03, 2013 | 2000 Ford F350 Super Duty Super Cab

1 Answer

I got 2001 ford f350 7.3 powerstroke. too much smoke,when start engine and running the vehicle. code p0603

if the smoke is white you have a water vapor problem and it will probably be your egr water cooler and oil cooler. if the smoke is blue, you may have a blown head-gasket or it could be the oil cooler also. take it to a ford dealer and let them put it on their computor, it will cost you a little but it will confirm what you may already know. hope this help's.

Jan 14, 2011 | Ford F-350 Cars & Trucks

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93 F350 7.3 deisel runs rough and smokes could the

I would check you're fuel and return sells a kit with all new hosesand fittings

May 04, 2010 | 1993 Ford F350

1 Answer

Smokes blue and white but not burning no oil or

if u have a 302 or 5.0L it probably is early warning signs of burning oil. Check pcv valve and change oil and use a quart of lucas engine restore. It may also be valve stem seals if only smokes when u start it up.

Feb 17, 2010 | Ford F-350 Super Duty Cars & Trucks

1 Answer

Some blue smoked whats tha? on 6.9 disel

if its coming out the exhaust, its either overheating or the rings may be going, not enough info.

Oct 03, 2009 | 1990 Ford F350

1 Answer

What kind of diesel for a 1986 fird f 350 diesel

ford hypoid gear oil with 4 oz of friction modifier (ford part # c8az-19b456-a) I think your local napa can get the friction addative for you but I use the stuff from ford...hope this helps

May 21, 2009 | 1986 Ford F 350

1 Answer

94 ford f350 diesel smoking bad on start up

Blue smoke is oil, probably a sign of worn rings, has it done quite high mileage?

Mar 16, 2009 | 1994 Ford F350 Crew Cab

1 Answer

1986 ford f350 shifting problem

hello you can check the slavecylinder for leakage there is a reservoir up near your mastercylinder black mounted on firewall has a plastic line take the cap of fill with fluid if low try again if no go check fluid level in transfer case with bent coat hanger or wire should register at leat 2-3 inches down if all is good sync gears out of sync goodluck

Sep 14, 2008 | 1986 Ford F 350

2 Answers

1986 f350 diesel wiring diagram

Hope this helps

Sep 09, 2008 | 1986 Ford F 350

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