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Valve cover breather


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67 Riv missing passenger side breather.  Looks to me like 7/8”.  Couldn’t find so tried 1” and way too big.  Believe they are originals.  Please help with correct size and, if possible, where best to look, please?

 

Thanks for your continuing assistance. . . . You may not know how much it means.

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Passenger side?  My '67 doesn't have anything on the passenger side valve cover.  Does the driver's side (or maybe your passenger side) look like this?  CA emission cars would have a hose to the air cleaner housing installed in place of the forward plug.

 

1967 Buick Electra 225 Survivor | Classic Vehicle Auctions

 

CARS lists both painted and chrome versions of the twist-on breather/oil cap.

 

https://oldbuickparts.com/product/oil-cap-black/

 

https://oldbuickparts.com/product/oil-cap-chrome-plated/

 

image.png.e20014a63c5baacffb6310ee62417a54.png

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Thanks!  Seemed to measure 7/8 & that doesn’t seem to exist.  Need to have main seal replaced and I’m hoping they can figure it out.  Until then, I have a 7/8 hole as a breather.  Can you believe someone could sell a vehicle as a 1-2 with a hole in the engine?!

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  • 2 weeks later...

Well, I personally have never seen covers like those before.  The hole on the right cover looks like the one typically punched into that flat circle at the forward end of your left cover.  On my '67, that hole has a rubber plug in it since it is a 49-state car.  CA cars would have a hose attached there that connects to the air cleaner housing.  The right cover on my '67 has no holes.  Looking on the internet, I did find pictures of a GS with covers like yours.

 

20230329_224715154_iOS-scaled.jpg

 

That car has the hole plugged, as I would expect for a 49-state car.  The left cover, however, has a closed cap like yours (but chrome) which I believe is incorrect.  If the PCV vent port is plugged, the oil filler needs a breather cap to provide fresh air intake for the PCV system.

 

Maybe @JZRIV or others can comment, but if this were my car, I'd plug the hole in the passenger side cover and install a breather cap on the driver's side cover like the one I posted above from CARS.

 

Hey, wait ---  are the pictures I posted from the internet actually YOUR car??? 

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Just found this photo of an A-Body GS-400:

 

Car of the Week: 1967 Buick Gran Sport 400 - Old Cars Weekly

 

This has a closed cap, but there is a breather in the other hole.  I don't know whether this is correct for a 400, but it looks like the driver's side cover on my 430.  Point is, there needs to be a breather somewhere to allow for air into the crankcase...

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You’re so smart!  Didn’t think about placing breather on driver side.  How would you seal the hole on passenger side. . . Seems there is no way of attaching.  Really don’t like having an open hole.  Would you try to find a different cover, EmTee?

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Measure the diameter of the open hole and go to a box store, auto store, etc., to find a rubber cap/stopper the same size.

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15 hours ago, Deadpurpledog said:

Here are pictures, EmTee.  The hole does not have two “wing” slots for many breathers and does not appear to be threaded.  What are you thoughts, please?

IMG_0262.jpeg

IMG_0259.jpeg

Those look like 69 or later covers. On my 69 there is a tube that is preformed that goes from there to the aircleaner.

 

20230913_155959.jpg20230913_155950.jpg20230913_160012.jpg

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Thanks @JohnD1956 - I think you've solved the mystery!  The covers on your 400 look just like the ones on @Deadpurpledog's 430.  I think someone has installed a set of 400 valve covers on this Riviera.

 

That said, there are a couple of options to solve the breather dilemma:

1) Get a rubber plug to fill the small hole and replace the solid oil fill cap with a twist-on breather cap or,

2) Leave the solid filler cap and find a push-in breather with grommet to put in the small hole (like the picture I posted above).

 

From CARS: https://oldbuickparts.com/wp-content/uploads/2022/08/catriv.pdf

 

image.png.388f4c1f46bde7095d029805c294a91d.png

 

Look here for a push-in breather to fit the hole in the valve cover:  https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=push-on breather

 

Edited by EmTee (see edit history)
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Incredible!  How do you find all these providers?!  Believe one of these will be perfect and one of the breathers which didn’t fit may replace solid on driver’s side.  Hope some time I will best able to return the generosity I’ve found on this site.  Thank you.

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For Buick stuff I usually check CARS and Bob's Automobilia.

 

https://oldbuickparts.com/

 

https://bobsautomobilia.com/

 

If I still can't find what I'm looking for, There's Kanter and Fusick.

 

https://www.kanter.com/

 

https://www.fusickautomotiveproducts.com/

 

Join AACA, BCA and or the GSCA.  Then you'll get their magazine(s) with more specific parts and service vendors.  Places like Summit and Jegs are good places to look for parts that are not specific to classic or antique cars (like the valve cover breather).

 

When all else fails, post your question on this forum!  ;)

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11 hours ago, Deadpurpledog said:

Incredible!  How do you find all these providers?!  Believe one of these will be perfect and one of the breathers which didn’t fit may replace solid on driver’s side.  Hope some time I will best able to return the generosity I’ve found on this site.  Thank you.

 

 Helpful websites, vendor and services,  under Buick General in this Forum.

 

  Ben

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