Blow by tube - Diesel Bombers



12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

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Old 01-20-2012, 06:07 PM
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Default Blow by tube

How do u keep the blow by tube from leakin oil sometimes I blow a good amount out of it
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Old 01-21-2012, 01:14 AM
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Basically it is what it is. There will always be oil coming out of it. Only thing I have seen is a filter/canister system that you have to drain every so often, if it's bad enough that it will soak your undercarriage I would say its time to deal with the issue though.
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Old 01-21-2012, 01:23 AM
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You can try something like this or build your own. http://www.puredieselpower.com/catal...it-p-6117.html
You may need to replace some rings if the blow by is the excessive.
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Old 01-21-2012, 03:01 AM
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U think maybe just a ball valve will work as long as it is drained regularly??
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Old 01-21-2012, 09:43 AM
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No a ball valve will not work, you will have oil leaks everywhere after, the tube is there to let engine pressures out..
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Old 01-21-2012, 09:45 AM
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The crankcase has to have some way to breath. If you just put a ball valve in the tube it will build to much pressure and you will really have an oil leak. You can build somthing out of pvc like the one shown above and drain at oill change.
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Old 01-21-2012, 11:55 AM
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I pulled the tube out from between the starter and routed it over to the frame rail and into a little catch can. It has a drain but nothing has built up yet. No more oil spots in the driveway.
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Old 01-22-2012, 12:10 AM
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i remember a brand new cat c15 that slobbered bad. the driver kept complaining about about his "engine oil leak" untill we extended the road draught tube so it vented below the engine. he never complained again (untill one of the guys i worked with accidently lit the interior on fire cutting with a torch under the cab and burnt the truck down in the shop : ) that was a night i will never forget
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Old 01-22-2012, 11:42 AM
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could you route the line up an put a breather on it? i have a tappett with no baffles an the old girl marks her spot everywhere an coats the underside of the truck
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Old 01-22-2012, 02:00 PM
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Quote:
Originally Posted by H.R.D View Post
You can try something like this or build your own. 88-02 Dodge 5.9L Cummins Crank Case Breather Relocation Kit
You may need to replace some rings if the blow by is the excessive.
"300% more breathing than factory". Yeah OK.
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