Old school M/T valve covers. Need a breather that fits

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Old May 10th, 2019, 11:45 AM
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Old school M/T valve covers. Need a breather that fits

These valve covers have an odd “D” shape for the breather and PVC valve. Does anyone know of a breather that fits well? The one that I bought fits too loose.
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Old May 10th, 2019, 01:10 PM
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Old May 10th, 2019, 10:54 PM
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The opening on those M/T valve covers for breathers are actually D-shaped ( and from memory so is on stock valve covers), but the stock rubber grommet fits those great. Then you can mount your breathers.
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Old May 11th, 2019, 09:06 AM
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I think there are two sizes to the stock rubber grommets a larger and a smaller one. Maybe you just have the smaller one?
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Old May 11th, 2019, 11:26 AM
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I have the M/T valve covers and I bought the grommets from RockAuto. The aluminum M/T covers are thicker than the stock, stamped steel, so I had to modify mine with a Dremel to get them to fit. FYI, the M/T covers do not usually have baffles inside, so you may have some oil in the PCV valve; also the grommet holes are not centered like the stock covers so if your running a stock air cleaner, the metal tube probably won't reach the valve cover.
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Old May 11th, 2019, 11:42 AM
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Doesnt all of the M/T valve covers have spot for baffles? They are not huge, but baffles none the less. I have NOS ones, and even drawings from them. Attaches with self-screwings to two bosses cast underneath.
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Old May 11th, 2019, 11:46 AM
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They do have screw-in baffle plates - I have a set with the baffles intact.

you can probably make them from sheet metal if you had to and it would be a good idea to have them so you're not sucking large amounts of oil through your PCV.
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Old February 8th, 2023, 06:44 PM
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Originally Posted by Inline
Doesnt all of the M/T valve covers have spot for baffles? They are not huge, but baffles none the less. I have NOS ones, and even drawings from them. Attaches with self-screwings to two bosses cast underneath.
Are you selling these Baffles? Do you know where I could source some? I have a set of these and I don't want oil getting sucked through my PCV or blowing out the breather. I've been scouring eBay and the internet looking for something that would work. Heck even if a template was available I think I could cut and bend up some 16 or 18 gauge sheetmetal.

I'm looking for the baffles that screw in just like this:


Any Help is greatly appreciated!

Last edited by rogue_ryder; February 8th, 2023 at 07:12 PM. Reason: added pic
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