Excessive crank case pressure frustration
#1320483
10/14/12 09:58 PM
10/14/12 09:58 PM
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Joined: Nov 2004
Posts: 7,647 Houston Texas
PAINT IT BLACK
OP
Got a CHIP on my shoulder
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OP
Got a CHIP on my shoulder
Joined: Nov 2004
Posts: 7,647
Houston Texas
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I was using a K&N crank case breather... Nothing internally to baffle oil. Fresh motor build. At idle, everything's ok. Driven in higher RPMs, oil sprays everywhere from that little breather. Huge Mess. Did. This before and the builder went back through it because of oil loss. Not smoking much, just oil getting sucked up into the pcv valve and fed to the intake. So here we are again. My thought is to use a baffled breather (and maybe even a catch can at the pcv valve?) or a crank case evac system like this to manage the blow by: http://chucker54.stores.yahoo.net/morcranevsys.htmlI understand the rings aren't yet seated on this new motor, but this is obviously unusual. If a leak down test shows nothing very telling, am I on the right track for managing the oil.. At least temporarily? The build: 360 stroked to a 408. Eagle crank, H beam rods, forged pistons, aluminum heads, hydraulic roller cam 248/254 duration, 109 separation, roller rockers .600 lift, M1 intake, final compression is 10.5:1 - dyno'd great for the budget at 500hpp/520tq. Just trying to figure out wtf is going on!!
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Re: Excessive crank case pressure frustration
[Re: PAINT IT BLACK]
#1320484
10/14/12 10:15 PM
10/14/12 10:15 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Is the PCV valve working properly?
I've had one stick before, the engine built up crankcase pressure and blew oil out the dipstick tube!
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Re: Excessive crank case pressure frustration
[Re: PAINT IT BLACK]
#1320485
10/14/12 10:18 PM
10/14/12 10:18 PM
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Joined: Nov 2005
Posts: 15,119 85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,119
85086
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Are there baffles in the valve covers? What type of driving? Drag race? auto cross?
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: Excessive crank case pressure frustration
[Re: moparpollack]
#1320486
10/14/12 10:27 PM
10/14/12 10:27 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I would add some baffles to the valve covers or get baffled ones
live every 24 hour block of time like it's your last day on earth
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Re: Excessive crank case pressure frustration
[Re: 64Post]
#1320491
10/15/12 03:16 AM
10/15/12 03:16 AM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Excessive crankcase pressure is only cured by installing new rings. Evidently your rings are not broken in yet or they were improperly installed/broken. Anything you do is only a bandaid for a serious internal problem..
I am truckless..
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Re: Excessive crank case pressure frustration
[Re: PAINT IT BLACK]
#1320492
10/15/12 07:49 AM
10/15/12 07:49 AM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Something is not hooked right if you have a proper baffle in the valve cover. I ran some MT valve covers years ago without baffles and it did this. I bolted a good sized baffle in the valve cover with the PVC valve in it and it fixed my problem. Either that or your motor is junk. Rings should and will seat within minutes of the motor running. Sorry to hear about the rear main...
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Re: Excessive crank case pressure frustration
[Re: 340SHORTY]
#1320493
10/15/12 09:55 AM
10/15/12 09:55 AM
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Joined: Mar 2010
Posts: 1,880 Out in Left Field, NY
bobs66440
top fuel
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top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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Quote:
Excessive crankcase pressure is only cured by installing new rings. Evidently your rings are not broken in yet or they were improperly installed/broken. Anything you do is only a bandaid for a serious internal problem..
Mine is a fresh rebuild and zero oil usage and no perceptable crankcase pressure. I would do a compression/leak down test.
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Re: Excessive crank case pressure frustration
[Re: PAINT IT BLACK]
#1320497
10/15/12 04:51 PM
10/15/12 04:51 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Id be looking for a different machinist/builder for the 3rd go around..
I am truckless..
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