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Old 02-26-2017, 10:41 PM   #1
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oil free engine

i am new to diesels , i have a 96 8.3 66k. i had a engine and body detail work done, after a trip i noticed light oil film on the bottom part of the transmission looks like oil from the vent tube spaying onto the trans and radiator area. i was thinking about a catch can or extending the down tube closer to the ground or angle it toward the front away from the trans. i dont like seeing oil anywhere. any suggesting getting a clean engine
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Old 02-26-2017, 11:20 PM   #2
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I don't have that irritation, but I've read several posts where owners have attached a plastic bottle to the breather tube to catch oil.
I once knew a man who actually plumbed the breather tube to terminate out from under the side of the coach. (CAT engine) He put a flexible section on the bottom of the breather tube to absorb engine vibration and movement vs the coach.
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Old 02-26-2017, 11:32 PM   #3
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Quote:
Originally Posted by tony326 View Post
i am new to diesels , i have a 96 8.3 66k. i had a engine and body detail work done, after a trip i noticed light oil film on the bottom part of the transmission looks like oil from the vent tube spaying onto the trans and radiator area. i was thinking about a catch can or extending the down tube closer to the ground or angle it toward the front away from the trans. i dont like seeing oil anywhere. any suggesting getting a clean engine
If that is the issue, it is called a slobber tube or blow by tube. I had mine extended to prevent buildup on the rear transmission. May think about a catch can because I don't want to cover my toad with oil either
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Old 02-26-2017, 11:32 PM   #4
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I use a plastic mayonnaise jar. I cut a hole the diameter of the slobber tube and slid the lid up the tube a few inches. A hose clamp on the hose to hold the lid in place, then drill a number of holes in the jar just below the threads on the jar top. Some put a piece of copper wool in the bottom of the jar, I use a bar coaster to absorb the oil. Screw the jar on the lid and it catches the oil vapor from the engine block.

It's not just for catching oil film, it keeps it off the radiator (if you have a rear radiator set up) and also off the Toad.

Some folks extend the slobber tube to the back bumper, but it doesn't save the Toad or the back of the RV from oil film.
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Old 02-27-2017, 10:05 AM   #5
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In addition to the home grown solutions, you can spend a few bucks and go a little more sophisticated. Which ever way you choose, be Extra Cautious not to cause added restriction to the Vent which will result in an increase in crankcase pressure, oil leaks and or higher oil consumption.
It's not just a hose. Keep this in mind when you are adding fittings and lengthening the hose.

https://www.cumminsfiltration.com/si...es/LT32540.pdf

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Old 02-27-2017, 11:27 AM   #6
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It's not popular with the "slobber bottle" crowd, but I installed the Fleetguard crankcase ventilation system dennis45 linked above, does a awesome job, very clean installation, and OEM approved.
Maintenance free, no mess, no bottle to keep up with.
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Old 02-27-2017, 11:29 AM   #7
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Here's a picture of the Fleetguard system:
Click image for larger version

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Old 02-27-2017, 11:30 AM   #8
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It's not popular with the "slobber bottle" crowd, but I installed the Fleetguard crankcase ventilation system dennis45 linked above, does a awesome job, very clean installation, and OEM approved.
Maintenance free, no mess, no bottle to keep up with.
Yes, I installed a few of these on the nat gas version of the ISC. I think the reason it's not too popular with the RV crowd is the cost.
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Old 02-27-2017, 11:32 AM   #9
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Yes, I installed a few of these on the nat gas version of the ISC. I think the reason it's not too popular with the RV crowd is the cost.
Yep, amazing how $$$ people will spend on a motorcoach, yet get all sideways about what maintenance, parts and time cost....
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Old 02-27-2017, 07:08 PM   #10
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As one member already mentioned be very careful not to create a restriction.
If that vent gets plugged your engine will push oil past a lot of gaskets.
The most common thing is that it will pop out the oil fill dip stick.
However I did see one engine that was 3 gallons low on oil when the tube got plugged with ice.
It is amazing how big a mess 3 gallons of oil makes.
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