'02 Powerstroke 7.3L blowing oil out of dipstick and blue exhaust smoke - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #1 of 2 (permalink) Old 04-28-2017, 03:21 PM Thread Starter
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'02 Powerstroke 7.3L blowing oil out of dipstick and blue exhaust smoke

This 2002 has 230K miles and has a small loss of power. The blue smoke and power loss were mostly simultaneous occurrences, about 2k miles ago. The oil/vapors coming from the oil dipstick have just appeared recently. It idles rough but will smooth out after warm up at rpm above idle. Of course, it will run rough again at idle...even after long haul. Now folks, I am desperate to "FIGGER" this out. Very annoying and the blue smoke LOOKS BAD too! Any ideas?
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post #2 of 2 (permalink) Old 04-28-2017, 05:49 PM
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'02 Powerstroke 7.3L blowing oil out of dipstick and blue exhaust smoke

Is it using oil? My suspicion is you've torn an injector o-ring. That allows oil to mix with the fuel. You say blowing oil out the dipstick? Blow by on a diesel is normal. High compression and no positive crankcase ventilation. What you don't want to see is a puffing blow by strong enough to blow the oil cap off if you lay it upside down on the filler neck. If you are pressuring the crankcase enough to blow oil out the dipstick, you must have an obstruction in the passive crankcase vent (doghouse) in the driver's side valve cover or the tubing.

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2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

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Last edited by RT; 04-28-2017 at 05:51 PM.
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