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A few months ago I purchased the Seaboard Envirovent kits for my Cummins ‘B’ motors,the result was nothing short of sensational…
The motors (originally fitted with Walker Airseps from new) both leaked oil from the Airsep’s and had a tendency to push the dipstick up and spray misted oil from that area.
I stuck with them for nearly one thousand hours thinking they where what Cummins installed and they had to be the right thing…
Googling it one day I came across this article from Seaboard
Airsep’s may well be a good product, but installed on my engines it was a complete failure and there is no way they could work, and installed in my very confined engine room there was no way to service the critical return valve located near the sump.
Tony nailed it here (taken from the above link)
“Along with this, they also changed the orientation of the side cover tube from pointing DOWN to UP”
The Airsep’s as fitted on my engines and signed off by Cummins from new had to defy gravity to work….
“Between this difficult-to-measure amount of oil in the pan and the natural tendency of an operator to keep the oil at the high mark (or think that “more” has got to be better than less when it comes to oil) all worked together to further exaggerate the problem of oil mist being pushed unnecessarily out of the crankcase breather”
Since fitting the kits I have let the oil level drop a little to the point where hay have stabilized,next oil change will see me remarking the dipsticks based on what I pull out of the engines.
“The liquids that accumulate in any type of CCV are typically composed of oil mist, condensed water vapor, and condensed blow-by combustion chamber gases. The gases, along with water vapor, are parts of any engine’s normal operation and contain small amounts of acids and other combustion by-products. As the engine wears w/either normal use, or thru lack of proper maintenance, installation issues and proper operation, these combustion by-products increase dramatically in amount and now are looked at as excessive “blow-by”. We now have more of these “liquids” to deal with, and IMO, I would NEVER want to return this highly contaminated “liquid” to my engine”
No brainer here… I will be sampling the old oil and comparing with the next oil change
To summarize – My bilge is now spotless,gone is the diesel smell and mist that coated everything, and my engines are not re-consuming all the gunk they spat out.
I could go on… If your seeing any of the above issues with your motors please read the article linked above, go look at the plumbing on your CCV system, re read the article and work it out, and don’t assume that (as I did) because Cummins installed Airseps on the engines from new they will work in your application.
There is more in the article that covers these issues,take the time to read it!!
Dan
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