Crankcase breather leaking
Posting Guru
Joined: Aug 2009
Posts: 2,271
Likes: 2
From: Mexia, TX
You mean the little cap you twist off to add oil?
Sometimes the gasket on those gets wore out and it'll let oil leak out. You could either buy another cap or find one in good shape at the junkyard...
Sometimes the gasket on those gets wore out and it'll let oil leak out. You could either buy another cap or find one in good shape at the junkyard...
Moderator
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From: Denver Metro Area, CO
Do you have a PCV system and is it hooked up and working?
There is no "crankcase breather" per se on these engines; there is an air inlet on one end and a PCV valve on the other end of the valve cover.
The PCV valve allows blowby gases to get sucked back into the combustion chamber, air is let in to replace the removed volume.
There is no "crankcase breather" per se on these engines; there is an air inlet on one end and a PCV valve on the other end of the valve cover.
The PCV valve allows blowby gases to get sucked back into the combustion chamber, air is let in to replace the removed volume.
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
He has a crankcase breather element, and it could be plugged up with oil, or the PCV valve is bad. Or he has excessive blow by due to a worn engine.
I'd replace the crankcase breather, and the PCV valve, make sure everything is working, then go from there if he still has issues.
It's not listed correctly in the Ford parts books for the year range of his truck, but if it's the circular Crankcase breather element directly behind the oil cap, with a hose nipple coming out of it at a 90 degree angle leading to the air cleaner,... The following Crankcase breather should replace your old one.
Crankcase Breather: F1BZ-6A768-A: replaced E6TZ-6A768-A: Motorcraft: FA-1118
PCV Valve: Two to choose from...
1: F-150 4x4: E1DZ-6A666-A : Motorcraft: EV-118
2: F-150 4x2: E0TZ-6A666-A : Motorcraft: EV-111
Check this thread here for more information on the Crankcase breather problem and a picture of the FA-1118 filter....
https://www.ford-trucks.com/forums/1...v-elbow-3.html
I'd replace the crankcase breather, and the PCV valve, make sure everything is working, then go from there if he still has issues.
It's not listed correctly in the Ford parts books for the year range of his truck, but if it's the circular Crankcase breather element directly behind the oil cap, with a hose nipple coming out of it at a 90 degree angle leading to the air cleaner,... The following Crankcase breather should replace your old one.
Crankcase Breather: F1BZ-6A768-A: replaced E6TZ-6A768-A: Motorcraft: FA-1118
PCV Valve: Two to choose from...
1: F-150 4x4: E1DZ-6A666-A : Motorcraft: EV-118
2: F-150 4x2: E0TZ-6A666-A : Motorcraft: EV-111
Check this thread here for more information on the Crankcase breather problem and a picture of the FA-1118 filter....
https://www.ford-trucks.com/forums/1...v-elbow-3.html
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New User
Joined: Jun 2011
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Do you have a PCV system and is it hooked up and working?
There is no "crankcase breather" per se on these engines; there is an air inlet on one end and a PCV valve on the other end of the valve cover.
The PCV valve allows blowby gases to get sucked back into the combustion chamber, air is let in to replace the removed volume.
There is no "crankcase breather" per se on these engines; there is an air inlet on one end and a PCV valve on the other end of the valve cover.
The PCV valve allows blowby gases to get sucked back into the combustion chamber, air is let in to replace the removed volume.
Okay I have taken to the shop and it is still blowing out oil behind the oil cap.
I had all vaccum lines replaced and i am getting new pcv valve today hopefully this will work.
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
Did you replace the Breather filter?
Do that at the same time you change the PCV valve.
Change the oil as well if it hasn't been done in a while.
Do that at the same time you change the PCV valve.
Change the oil as well if it hasn't been done in a while.
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Old School Hot Rodder
Joined: Feb 2006
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From: Exmore, VA
One problem I have run into on the carbureted 300s is the actual pipe that goes into the intake will plug up with sludge rendering the PCV valve inoperable. I agree with 81-F-150-Explorer on change the breather filter, it gets overlooked frequently.
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
I'd replace the crankcase breather, and the PCV valve, make sure everything is working, then go from there if he still has issues.
It's not listed correctly in the Ford parts books for the year range of his truck.
Wanna bet? What year is your parts catalog?
1985 from 7/30 1984, 1986/89: Crankcase Breather: F1BZ-6A768-A (replaced E6TZ-6A768-A) Motorcraft: FA-1118
It's not listed correctly in the Ford parts books for the year range of his truck.
Wanna bet? What year is your parts catalog?
1985 from 7/30 1984, 1986/89: Crankcase Breather: F1BZ-6A768-A (replaced E6TZ-6A768-A) Motorcraft: FA-1118
E53Z-6B897-A (replaced E43Z-6B897-A, E2DZ-6B897-A, E1DZ-6B897-A and etc) .. Crankcase Ventilation Filter Assy-Includes Cap, Filter & Hoses (Motorcraft EC-712).
Source: 1980/89 Ford Light Truck Parts Catalog-Final Printing March 1994 / Available on a CD (Chris is using this puppy) from hipoparts.com. My 3/94 version is on microfiche.
How old is your parts catalog? Prolly from the 80's. There were four '80/89 parts catalog changes within a 12 month period, beginning: 9/1979, ending 3/1994.
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
Yeah it's two paper bound books from the 80's, one is text and the other is illustrations. it covers up to 1986. Both are bound in a binder and missing their covers. The dealer was cleaning out it's library back in 1995, and was going to throw them away along with some service books and diagrams so I grabbed them.
It lists the 1985 Breather filter assymbly as: D1AZ-9D695-A / Motorcraft FA-88
It does list two different filler caps though!
The one you mention, E53Z-6B897-A with the hose and fittings... and...
Oil Filler Cap: E5TZ-6766-D, Cross refference that number online and it refferences it's been replaced by: F3AZ-6766-B / Motorcraft: EC-743
hmmm...
It lists the 1985 Breather filter assymbly as: D1AZ-9D695-A / Motorcraft FA-88
It does list two different filler caps though!
The one you mention, E53Z-6B897-A with the hose and fittings... and...
Oil Filler Cap: E5TZ-6766-D, Cross refference that number online and it refferences it's been replaced by: F3AZ-6766-B / Motorcraft: EC-743
hmmm...
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
Yeah it's two paper bound books from the 80's, one is text and the other is illustrations. it covers up to 1986.
Both are bound in a binder and missing their covers. The dealer was cleaning out it's library back in 1995, and was going to throw them away along with some service books and diagrams so I grabbed them.
It lists the 1985 Breather filter assembly as: D1AZ-9D695-A / Motorcraft FA-88
This fits into the air cleaner, but there is no need to buy the whole tamale.
D1AZ-9D697-A .. Crankcase Breather Filter Element (foam filter only) Motorcraft FA-105
It does list two different filler caps though!
The one you mention, E53Z-6B897-A with the hose and fittings... and...
Oil Filler Cap: E5TZ-6766-D, Cross reference that number online and it references it's been replaced by: F3AZ-6766-B / Motorcraft: EC-743
Both are bound in a binder and missing their covers. The dealer was cleaning out it's library back in 1995, and was going to throw them away along with some service books and diagrams so I grabbed them.
It lists the 1985 Breather filter assembly as: D1AZ-9D695-A / Motorcraft FA-88
This fits into the air cleaner, but there is no need to buy the whole tamale.
D1AZ-9D697-A .. Crankcase Breather Filter Element (foam filter only) Motorcraft FA-105
It does list two different filler caps though!
The one you mention, E53Z-6B897-A with the hose and fittings... and...
Oil Filler Cap: E5TZ-6766-D, Cross reference that number online and it references it's been replaced by: F3AZ-6766-B / Motorcraft: EC-743
1985 from 8/30/1984 & 1986: E5TZ-6766-D
1987/88: E7DZ-6766A
1989: E9DZ-6766-A
F3AZ-6766-B (replaced: F3AZ-6766-A, FOAZ-6766-A, E9DZ-6766-A, E7DZ-6766-A, E6DZ-6766-A, E5TZ-6766-D).
Step up and buy the 1980/89 CD, won't set you back too much dinero. Keep the ancient 1980/86 version around for sheets and giggles.
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