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| The Pub For General Automotive Related Talk |
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01-03-2017, 09:58 PM
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#1 | ||
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Starter Motor
Join Date: Nov 2009
Posts: 5
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I have a freshly rebuilt 347 Windsor engine, it seems to have oil coming out of the rocker cover breather, any ideas how to stop this, engine did not do this before rebuild.
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01-03-2017, 10:01 PM
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#2 | ||
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FF.Com.Au Hardcore
Join Date: Jun 2005
Posts: 3,633
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PCV working?
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01-03-2017, 10:58 PM
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#3 | ||
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Performance moderator
 
Join Date: Feb 2005
Location: St Clair..N.S.W
Posts: 14,875
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Rings haven't bedded in yet.. Hope you have just mineral oil in it.. Check your breathers.. Then do some reasonably hard acceleration runs from 60 to 100kph or speed limit..
A few minutes a part. Make sure its not running too rich or advanced !!
__________________
Real cars are not driven by front wheels,real cars lift them!!... BABYS ARE BOTTLE FED, REAL MEN GET BLOWN. Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! Dart 330ci block turbo black pearl EBXR8 482 rwkw.. Daily driver GTE FG.. Projects http://www.fordforums.com.au/showthread.php?t=107711 http://www.fordforums.com.au/showthr...8+turbo&page=4 |
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02-03-2017, 11:27 AM
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#4 | ||
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When in doubt, GAS IT!!
Join Date: Sep 2006
Location: Lower Eyre Peninsula, SA
Posts: 3,018
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If you've already "run it in", it's already too late to stop the blow by. You need to do the hard acceleration runs the first time you take it for a drive once up to running temp or the rings won't be pressed hard enough against the bore walls to get rid of the honing marks. After the first heat cycle and no hard runs, all you do is take the edges off the hone marks and the bore will forever leak gasses, and possibly oil too.
The best advice I was given re engine run in was warm it up, go do half a dozen power runs in third gear starting with pulling to 1/2 revs then work your way up to 3/4 revs, (to redline). Then go back and dump the oil and do it again. ... Then it'll be good to go and you can spend the time to bed everything else in.
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. HERS- BFIII Wagon Gold, alloys, dual fuel, bullbar, big tow pack, trans cooler, fully rebuilt HD suspension, Clarion, alarmed, full 2 1/2" sports system, mint body MINE- AUII Forte Meteorite, dual fuel but otherwise bog stock. MINE- AUII Fairlane Sportsman Liquid Silver over meteorite,HIDs', Airhog, Eagle Leads, dual fuel, custom rear springs, BA slotted discs + a second one for spares . |
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02-03-2017, 10:12 PM
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#5 | ||
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Performance moderator
Join Date: Feb 2005
Location: St Clair..N.S.W
Posts: 14,875
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You bed the RINGs in .. The cross hatch marks on he bore stay there..
__________________
Real cars are not driven by front wheels,real cars lift them!!... BABYS ARE BOTTLE FED, REAL MEN GET BLOWN. Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! Dart 330ci block turbo black pearl EBXR8 482 rwkw.. Daily driver GTE FG.. Projects http://www.fordforums.com.au/showthread.php?t=107711 http://www.fordforums.com.au/showthr...8+turbo&page=4 |
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03-03-2017, 07:21 AM
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#6 | ||
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The one and only
Join Date: Dec 2004
Location: Carrum Downs, Victoria
Posts: 9,053
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Doesn't sound good, hopefully it is just needing to be run in and not damaged rings.
How many kilometers have you done with this motor so far?
__________________
1992 DC LTDHO 360rwkw built by me Tuned by CVE Performance Going of the rails on a crazy train Other cars include Dynamic ED Sprint, Dynamic DL LTD, Sparkling Burgundy DL LTD, Yellow, Red & Blue XB sedan & Black XB Coupe
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03-03-2017, 10:58 AM
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#7 | ||
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Starter Motor
Join Date: Nov 2009
Posts: 5
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Thanks guys, it's only done about 300kms so far, will try your suggestions.
Thanks |
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03-03-2017, 02:11 PM
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#8 | ||
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Regular Member
Join Date: Feb 2016
Posts: 269
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Did you fit fancy rocker covers to it? - the ones without a baffle covering the breather cap??
Quite common to see oil being forced out by roller rockers because there is no baffle on some aftermarket rocker covers. Check out the standard ones. The have baffles from factory to stop this happening. but with high lift cams And high lift rockers there isn't alot of roo for baffles inside. |
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04-03-2017, 09:17 PM
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#9 | |||
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FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Perth, Northern Suburbs
Posts: 4,881
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Quote:
All engines will pump a bit, that's why the PCV Valves & pipe is there. |
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05-03-2017, 12:35 AM
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#10 | ||
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FF.Com.Au Hardcore
Join Date: Jan 2005
Location: WA
Posts: 1,126
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Is this a carby or efi engine ?
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06-03-2017, 09:31 PM
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#11 | |||
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Starter Motor
Join Date: Nov 2009
Posts: 5
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Quote:
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07-03-2017, 02:21 AM
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#12 | ||
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FF.Com.Au Hardcore
Join Date: Jan 2005
Location: WA
Posts: 1,126
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Being the simplest look at the PCV valve operation. It should be connected from the valve to the carby base with no leaks.
The carby sucks any blow by from the sump when the valve opens etc and an airstream is ingested into the sump area via the breather you mention to assist in creating airflow, ie air should be going into this breather not oil coming out  But as Crazy Dazz indicates it is still common for a small amount of oil to drip out even under normal operation but not a lot etc. If that all seems ok then as paulie indicates if you have now fitted different covers then pull it and check for a baffle as no baffle will mean the rockers can throw oil into this breather. |
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Oil coming out of rocker cover breather
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