Help, A little right side blow by!

1987StangL268X · 03-20-2007, 08:06 AM

I have had a problem with blow by since i put new valve covers on that had breathers...it blows out oil at idle and drips on the headers, causing a big cloud of smoke. This is a brand new motor so its anything like that. any ideas? Please help its annoying

Jeff Chambers · 03-22-2007, 11:39 AM

Few things here:

(1) If you're running a PCV, ditch the breathers. A PCV system should be closed.
(2) If the valve covers don't have baffles in them, put some in.
(3) If the valve covers do have baffles and you're getting this kind of blow-by, then either the rings didn't seat or you've got problems with the engine build. Run a leak-down test to see how bad the blow-by really is.

1987StangL268X · 03-23-2007, 08:56 AM

Yea ty for the reply, I found that it was that i had to remove the baffles to create room for the roller rockers. Im wishing now i would havae went with a high volume oil pump though!

Jeff, do you happen to make the trip to bowling green kentucky @ beech bend for the nmra?

mustangII460 · 03-24-2007, 10:57 PM

Run the breathers into a oil separator.

03-20-2007, 08:06 AM	#1
1987StangL268X Registered Member Join Date: Feb 2007 Location: Tennessee Posts: 38	Help, A little right side blow by! I have had a problem with blow by since i put new valve covers on that had breathers...it blows out oil at idle and drips on the headers, causing a big cloud of smoke. This is a brand new motor so its anything like that. any ideas? Please help its annoying __________________ 1987 mustang hatchback. weld wheels, driveshaft loop, subframe connectors,308 w/ 520 lift cam, edelbrock perf rpm alum heads 2.02 1.60 valves, 1.6 roller rockers, edelbrock air gap performer intake, roller lifters, 625 vac secondary demon, c-4 trans w 3,000 stall, 3.73 gears

03-22-2007, 11:39 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Help, A little right side blow by! Few things here: (1) If you're running a PCV, ditch the breathers. A PCV system should be closed. (2) If the valve covers don't have baffles in them, put some in. (3) If the valve covers do have baffles and you're getting this kind of blow-by, then either the rings didn't seat or you've got problems with the engine build. Run a leak-down test to see how bad the blow-by really is. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

03-23-2007, 08:56 AM	#3
1987StangL268X Registered Member Join Date: Feb 2007 Location: Tennessee Posts: 38	Re: Help, A little right side blow by! Yea ty for the reply, I found that it was that i had to remove the baffles to create room for the roller rockers. Im wishing now i would havae went with a high volume oil pump though! Jeff, do you happen to make the trip to bowling green kentucky @ beech bend for the nmra? __________________ 1987 mustang hatchback. weld wheels, driveshaft loop, subframe connectors,308 w/ 520 lift cam, edelbrock perf rpm alum heads 2.02 1.60 valves, 1.6 roller rockers, edelbrock air gap performer intake, roller lifters, 625 vac secondary demon, c-4 trans w 3,000 stall, 3.73 gears

03-24-2007, 10:57 PM	#4
mustangII460 Factoy Five Roadster Join Date: May 2000 Location: Sevier Co,Tennessee Posts: 1,681	Re: Help, A little right side blow by! Run the breathers into a oil separator. __________________ Frank

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