Oil Breather Cap Problem

feifong

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Apr 4, 2005

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mesa

Apr 8, 2005

#1

• Apr 8, 2005

• #1

my car is an 83 mustang It keeps throwing oil all over the exhaust manifold i have replaced the oil cap twice and still keeps leaking it i have even put more gaskets on it and have sealed the bottom of the cap with gasket maker Anyone got any ideas. It loses about half a quart everyday

is it ok to just buy a regular cap that doesnt have a breather on it?

 

Curse

Member

Apr 8, 2004

791

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El Paso, TX

Apr 8, 2005

#2

• Apr 8, 2005

• #2

If you car is overflowing from the oil neck, then you got bigger problems than a oil cap.

 

feifong

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Apr 4, 2005

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Apr 8, 2005

#3

• Apr 8, 2005

• #3

oil

the oil neck?

 

Curse

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Apr 8, 2004

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El Paso, TX

Apr 8, 2005

#4

• Apr 8, 2005

• #4

where you put the oil in, located on the valve cover. Filler neck if you want to call it that

 

feifong

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Apr 8, 2005

#5

• Apr 8, 2005

• #5

yea its overflowing what you think is the prob?

 

Ranchero5.0

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Jan 1, 1999

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Hagerstown MD

Apr 8, 2005

#6

• Apr 8, 2005

• #6

With the cap off can you see the rockers down the hole? If so then the rockers are slinging oil up. Guy mistakenly take the baffle out to get more clearance for the rockers in stead of making a new flatter baffle. Check it out.

Jamie

 

feifong

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#7

• Apr 8, 2005

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with the cap off i dont see anything there is only like a metal piece

 

Curse

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Apr 8, 2004

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El Paso, TX

Apr 8, 2005

#8

• Apr 8, 2005

• #8

Does oil come out of the dipstick too?

 

feifong

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#9

• Apr 8, 2005

• #9

thats what i see all the time there is always oil on the dipstick tube and on top of it

 

Curse

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Apr 8, 2004

791

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El Paso, TX

Apr 8, 2005

#10

• Apr 8, 2005

• #10

Possible blowby?? I don't want to tell you something its not so I'll let the other guys chime in.

 

feifong

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Apr 4, 2005

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#11

• Apr 8, 2005

• #11

this car just had an overhaul 1 1/2 yrs ago i think you are correct on the blow-by

 

Ranchero5.0

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Jan 1, 1999

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Hagerstown MD

Apr 9, 2005

#12

• Apr 9, 2005

• #12

I'd do a compression check too. That much and you may have more than just blowby.

 

feifong

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Apr 9, 2005

#13

• Apr 9, 2005

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if compression is good does that mean there is no blow-by?

 

Ranchero5.0

The Voice of Reason

Jan 1, 1999

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Hagerstown MD

Apr 9, 2005

#14

• Apr 9, 2005

• #14

No, but if it stays the same accross each bore you don't have a holed piston or bad head gasket.

Jamie

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Apr 9, 2005

#15

• Apr 9, 2005

• #15

do you have adequate crankcase ventillation (other breathers, PCV, etc)? if not, the pressure will take the path of least resistance (an overloaded breather, seals, etc).

and as Jamie said, a leakdown test is much more revealing for finding a source and volume of poor sealing.

good luck.

 

jruppert

Founding Member

Oct 20, 2001

294

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Michigan

Apr 30, 2005

#16

• Apr 30, 2005

• #16

I had a situation where I was getting oil out of the dipstick like crazy and it was a new engine. I even tried oil breathers and it made it even worse. I ended up taking the lower off and found that the lower gasket had blown out. It was blown out at the middle and forcing the block to be pressurized. I replaced it and no problems since.