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

blowby problems

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Old 04-15-2010, 05:17 PM
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ATTN blowby problems

i have a 95 dodge ram 3500 5.9 turbo diesel with a standard transmission. i just did a valve job and complete tune up on it after that i have ran into many many issues so i am looking for some helpful advice or at least the direction to go to. i started seeing blowby come out of vacccum pump and power steering pump so i replace vac pump and new gasket and orings still leaks more so i replaced vac hoses , still leaks injector now leaking at banjo bolt tightened bolt broke it got new bolt copper seals and new injector. this leaks still along with oil from vac pump, now its leaking oil at turbo oil tube and around valve cover gaskets, checked blow by tube everything is good. glued my hair back on my head after i spend alot of money and asked dodge they were like talking to my dog usless. i have found out that when i push on brake pedal oil comes out of vac pump and pedal gets hard when i realese brake pedal the oil is sucked back in. can sombody tell me what the world is going on bacuse i am lost
 
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Old 04-15-2010, 05:24 PM
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welcome to diesel bombers and when you checked your blowby tube was it working you did have some correct because it sounds like its not working or you got so much pressure it is not able to keep up
 
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Old 04-15-2010, 05:26 PM
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removed tube and cleaned tube replaced tube still leaks

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also i put my finger over tube with enine running nothing comes out no air or oil or money or nothing
 

Last edited by scottgilbert; 04-15-2010 at 05:26 PM. Reason: Automerged Doublepost
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Old 04-15-2010, 05:32 PM
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check into it a little further sounds like it might be plugged at the actual breather is it on the side of the block above the starter and below the fuel pump ithink thats where it is at if its like my 1st gen you get that unplugged and your oil leaks should quit there should be a substance like steel wool or sos pad in there
 
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Old 04-16-2010, 04:47 PM
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mine is above fuel pump but i am having trouble getting it off so ill let you know what i find i have to remove six 10 mm bolts and the tappet ousing will come of and i can get to the filter other than that i might have to pull injection pump due to its location and difficult ways to take it off





and now i have damage the stamped metal plate by prying it back to see if anydamage to screen no screen anywhere no metal mesh type anywhere i can see with a mirror . wel now i really have to pull injection pump .

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crankcase pressure to high is my main problem
 

Last edited by scottgilbert; 04-16-2010 at 04:47 PM. Reason: Automerged Doublepost
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Old 04-17-2010, 12:39 PM
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this new guy is pretty funny. Sorry to laugh at a fellow diesel bomber in distress; I've "been there" a few times now, and actually still AM there! These guys are great on here. Just give them as much info and facts as you can and they WILL set you straight. Where are you located?
 
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Old 04-17-2010, 01:21 PM
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Old 04-17-2010, 05:30 PM
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in texas about 70 miles north of houston

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well got the injector pump off and plate currently trying to see if i can bend the plate back my self. i still can not figure out what would cause high crankcase pressure. any body got any ideas , or mabye some stronger glue cause i just yanked my hair out again .. i know mabye i will buy a wig. will post with results after pump is back on in the mean time if any one knows what would cause this please feel free to reply thanks
 

Last edited by scottgilbert; 04-17-2010 at 05:30 PM. Reason: Automerged Doublepost
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Old 04-17-2010, 06:41 PM
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ya let us know when you have got it back together again and we can go from there i am interested in what you found and interrested in what mods or upgrades you have done
 
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Old 04-19-2010, 11:59 AM
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anything?
 


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