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Re: Engine Pressure Blowing Oil [Re: MR_P_BODY] #1048114 08/06/11 08:14 PM 08/06/11 08:14 PM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis I Live Here
hemi-itis I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	Quote: Quote: No no e vac system. should I get one? No... not with a full exhaust... a E-vac will pull a max of 5"hg and with a exhaust for every inch of back pressure you reduce the effectiveness by that same amount so if the exhaust is greater than 5"hg it will pressurize the crank case Mr P,I thought the one way valve for the evac system would prevent that from occuring. HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: Engine Pressure Blowing Oil [Re: hemi-itis] #1048115 08/06/11 08:21 PM 08/06/11 08:21 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	The last time my engine blew out the dip stick, buckled the valley pan and blew oil everywhere I wiped a exhaust cam lobe. What kind of cam do you have? it's ok to butt heads, just don't do it with a butthead

Re: Engine Pressure Blowing Oil [Re: hemi-itis] #1048116 08/06/11 08:24 PM 08/06/11 08:24 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: Quote: No no e vac system. should I get one? No... not with a full exhaust... a E-vac will pull a max of 5"hg and with a exhaust for every inch of back pressure you reduce the effectiveness by that same amount so if the exhaust is greater than 5"hg it will pressurize the crank case Mr P,I thought the one way valve for the evac system would prevent that from occuring. If you start backing up that heat, that valve wont last for a minute

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048117 08/07/11 12:33 AM 08/07/11 12:33 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: No no e vac system. should I get one? Forget the Evac system. Weather you have one or not is not your problem. Step the PCV away from the oil baffle at least 1/4" - minumum and hook the hose to a vacuum source ( vacuum at idle, not ported vacuum ). Leave the breather off on the other valve cover. Fire it up and at idle put your hand over the open breather hole. You should feel some amount of suction ( even with a stout cam ). If it starts to pressurise right away, you have excessive blow-by for some reason. Fastest 300

Re: Engine Pressure Blowing Oil [Re: Crizila] #1048118 08/07/11 07:23 AM 08/07/11 07:23 AM
Joined: Jan 2003 Posts: 9,986 Frostbitefalls MN (Rocky&Bullw... gregsdart master
gregsdart master Joined: Jan 2003 Posts: 9,986 Frostbitefalls MN (Rocky&Bullw...	On a motor that size I would consider a crank scraper. The 7 qt system is marginal and windage may continue to give you problems. 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

Re: Engine Pressure Blowing Oil [Re: gregsdart] #1048119 08/07/11 01:48 PM 08/07/11 01:48 PM
Joined: Aug 2003 Posts: 43,127 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,127 Bend,OR USA	Quote: On a motor that size I would consider a crank scraper. The 7 qt system is marginal and windage may continue to give you problems. Anything you can do to control windage will make the car faster Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Engine Pressure Blowing Oil [Re: MR_P_BODY] #1048120 08/07/11 03:41 PM 08/07/11 03:41 PM
Joined: Sep 2005 Posts: 1,328 St. Louis, MO mopardamo pro stock
mopardamo pro stock Joined: Sep 2005 Posts: 1,328 St. Louis, MO	Quote: Quote: Hello, I had some similar problems on a car with a full exhaust. The tubing was not welded to the end of the reducer. The tubing was inserted past the reducer end over an inch. This caused a bunch of back pressure that only showed up for me at the track. Intake leaks, dipstick pushed up, ballooned up pan, leaks etc. This was a fresh motor also. Do you have a full exhaust? Damon What are you referring to when you say tubing The 2.5" exhaust pipe was inserted thru the reducer and not mated to the end of the reducer just off the header collector. Caused a heck of a reversion that caused back pressure into the heads and then into the chambers from what I can tell. When the exhaust was corrected the problems went away. No other changes were done. Damon

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048121 08/07/11 04:43 PM 08/07/11 04:43 PM
Joined: Jul 2008 Posts: 30,424 Florida STAYcation dOc ! The village idiot's idiot
dOc ! The village idiot's idiot Joined: Jul 2008 Posts: 30,424 Florida STAYcation	Man ... people talking about PCV tubes, windage trays and scrapers ...... I talked to a Bud of mine in FL last nite ... this topic was brought up and he actually TESTED THIS some years back. He plumbed-in a air fitting into a motor he was going to rebuild ... and put 80 psi into the oil pan to BALLOON-UP the valley-pan like that. What you have here is some major BLOW-BY ... like holes in pistons or busted up rings.

Re: Engine Pressure Blowing Oil [Re: dOc !] #1048122 08/07/11 05:07 PM 08/07/11 05:07 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Man ... people talking about PCV tubes, windage trays and scrapers ...... I talked to a Bud of mine in FL last nite ... this topic was brought up and he actually TESTED THIS some years back. He plumbed-in a air fitting into a motor he was going to rebuild ... and put 80 psi into the oil pan to BALLOON-UP the valley-pan like that. What you have here is some major BLOW-BY ... like holes in pistons or busted up rings. Fastest 300

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