how much blow by is normal
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how much blow by is normal
i picked up a 7.3 with a hypermax turbo on it. how much blowby is normal when you pull out the breather pipe in the valvecover?.. its in the valvecover now because of the turbo.
thanks
thanks
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Freshman User
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also, its smoking out the exhaust when you rev it and hold it. it misfires then smokes.. when it doesnt misfire it doesnt smoke. im hoping its the injectors and injection pump.
the blowby worries me more unless thats normal
http://www.youtube.com/user/PampenaM.../0/fWFxR3ecXaM
the blowby worries me more unless thats normal
http://www.youtube.com/user/PampenaM.../0/fWFxR3ecXaM
Logistics Pro
Joined: Sep 2010
Posts: 4,411
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From: Victor, MT
Blowby is normal. it shouldnt come out in puffs but a steady stream. personally, my 84 has no blowby because of the recent complete rebuild it had done. The smoke, what color is it? if its black then your IP might be turned up a bit too much, if its misfiring with grey smoke, you got an IP/Injector problem.
Whats the spraying hitting the ground, cant quite tell lol cause im a little blind right now.
Whats the spraying hitting the ground, cant quite tell lol cause im a little blind right now.
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Freshman User
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its grayish smoke. it only smokes once it starts to missfire. if i hold it just below that rpm it doesnt smoke at all.
the spraying hitting the ground is water from my garden hose cooling system lol.
the blowby is a steady stream its not pulsing so its from all 8. but its a pretty good amount. ill try and get a vid of that later
the spraying hitting the ground is water from my garden hose cooling system lol.
the blowby is a steady stream its not pulsing so its from all 8. but its a pretty good amount. ill try and get a vid of that later
Posting Guru
Joined: Jan 2010
Posts: 1,665
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From: Terre Haute, IN
Anyone think the diesel kleen trick would help?
Ray, try removing your fuel filter, dumping out the diesel and filling it with Diesel Kleen (comes in a gray bottle, available at your parts store) and put it back on. Start it and run in for a few seconds (not sure what the official time frame is, but you want the injection pump and injectors full of diesel kleen) then shut it off and let it sit for a few hours (overnight would be better).
Ray, try removing your fuel filter, dumping out the diesel and filling it with Diesel Kleen (comes in a gray bottle, available at your parts store) and put it back on. Start it and run in for a few seconds (not sure what the official time frame is, but you want the injection pump and injectors full of diesel kleen) then shut it off and let it sit for a few hours (overnight would be better).
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Elder User
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I do not think that diesel kleen will help but it is a valuable try. i would spend the $8 and try that before i bought an IP
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Postmaster
Joined: Apr 2009
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From: Malahat/Cowichan Valley
i am slightly color deficient but damn if that doesnt look blue and mirror a CDR valve issue. Have you pulled it off and cleaned it? What does the inside of the intake look like, all fouled black i bet. Also what the hell happened to the front of the motor? the cooling fan is destroyed. Did this come from a JY?
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it still does that exhaust smoke even with that CDR disconnected. heres a vid of the blowby smoke.
the motor was out of a junk truck. it was a farm truck with low miles but im sure it had a lot of run time
YouTube - ‪7.3 idi blow by‬‏
the motor was out of a junk truck. it was a farm truck with low miles but im sure it had a lot of run time
YouTube - ‪7.3 idi blow by‬‏
Logistics Pro
Joined: Sep 2010
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From: Victor, MT
cant use my truck because there is no blow-by cause it was freshly rebuilt, i would try having my buddy logan get the 86 started but it needs quite a few things for that to happen. I will say this bout the CDR: You need to soak it in something like white gas or kerosene to break up all the soot and oily crap in there, then throw it back on....the CDR valve controls crankcase pressure and takes the oil mist that these engines produce and puts it back in the engine....that has to be in working order for the engine not to burn that oily mist that is in passes the intake into the combustion chamber.
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cant use my truck because there is no blow-by cause it was freshly rebuilt, i would try having my buddy logan get the 86 started but it needs quite a few things for that to happen. I will say this bout the CDR: You need to soak it in something like white gas or kerosene to break up all the soot and oily crap in there, then throw it back on....the CDR valve controls crankcase pressure and takes the oil mist that these engines produce and puts it back in the engine....that has to be in working order for the engine not to burn that oily mist that is in passes the intake into the combustion chamber.
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