Could some one please pull there oil cap off with the engine running and tell me what you hear? If you leave the cap loose with the engine running does it blow it into the air?
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Normal Crankcase Pressure
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Here is an example, just wondering if anyone elses oil fill cap behaves like this?
https://m.youtube.com/watch?v=-KjGekZDmPM
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Yes I did the test per the service manual and ended up with 12 inches, the manual said 5.8, but Cummins said not to worry until it is over 28 inches. Right now I am most worried about the smoke out the filler cap and breather. Can someone look at there engine when it is warmed up and let me know if this is normal?
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My cap flutters just like that upon startup. I haven't tried it warm yet. But it does seem unusual to me because the large engines I have don't do that at all. That being said they don't make anywhere close to the same power/torque per displacement.
I haven't seen that test in the service manual. I'll have to check it out.
Any more follow-up with Cummins on this issue?
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That's good to know, but it is odd compared to diesels I'm used to.
Do you think you were at some kind of extreme angle that may have contributed to the first damaged engine? My assumption and from my experience at work, that loss of oil led to a destroyed bushing. I'm wondering if this is a flaw seen at odd angles or something. I've heard of engine damage with the newer 3.6 Pentastar that Dodge uses when they're used at certain angles.
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I hope it was not a weird angle that caused it. If so the marketing for a Jeep is a little inappropriate. Cummins recalled the engine and are doing a failure analysis on it. Hopefully it is a one off failure. I have a very noticeable alarm for low oil pressure on my digital dash and have never seen it come on at weird angles.
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Originally posted by Jordaddy View PostHaven’t tried the test taking my valve cover cap off but my crankcase vent puts out way too much oil into my intake making my inter cooler boots sweat oil and drip. Can someone give me the report help hotline number I can’t seem to find it
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I’ll keep you updated. I did find out due to the vacuum pump it does make the engine have a more positive crankcase but I know that when I use my Jeep to climb up the hill at my work around 1800 rpm I notice the catch can fill half way with oil which for any vehicle is not a good thing my warranty I think is up so I may be screwed even though it is an obvious design flaw on their part
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Originally posted by R2.8Samauri View PostThe solution to my issue was to vent the crankcase breather to atmosphere. Now people tell me it smells like I have an oil leak. Cummins also recommended a separator, but I don’t really have room for it. FYI this does not meet the emissions, but neither does ripping off the EGR.
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