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Discussion Starter · #1 ·
Hi All,

I happened to be searching for valve covers on the local Craigslist site, and saw several that had no oil filler caps. Are these for certain type of engines (i.e. from a particular time period) or can they be used on any SBC with accommodations for an oil filler elsewhere? I'm not necessarily looking to buy any, but wanted to ask out of curiosity (although there is a nice Moroso setup for sale :D )

Thanks! :thumbup:
 

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"But how do it know?"
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Discussion Starter · #3 · (Edited)
ductape&monkeywrench said:
dont need one, fill through the oil breather caps, then you can fill on both sides for even filling (like it matters lol)
Oh, does it need to be poured in evenly? No wonder the oil is only leaking on the driver-side of the engine! :(









...Joking! :D
 

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Discussion Starter · #5 ·
Lol! You changed your answer! ;) Thanks, I think they'll look right at home with the recently painted carburetor. Its red and gold. :D

Thanks for the info DT&MW :thumbup:
 

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Discussion Starter · #7 · (Edited)
sheltonk7 said:
older small blocks used a pipe with oil cap
Oh that's interesting. It doesn't seem to be a part of the advertised package and I couldn't find it online either.


EDIT: Found it on Summit. Not too expensive and look kinda nice too.
 

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lt1silverhawk said:
Oh that's interesting. It doesn't seem to be a part of the advertised package and I couldn't find it online either.


EDIT: Found it on Summit. Not too expensive and look kinda nice too.
The factory oil fill tube for valvecovers with no holes in them is pressed into a hole in the front of the intake manifold, in front of the waterneck. To use no hole covers you need to have an intake with this hole in it. Most aftermarket intakes do not have this hole, unless they are from the late 70's aftermarket time period or older, modern aftermarket SBC intakes don't have it.
 

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Discussion Starter · #9 ·
ericnova72 said:
The factory oil fill tube for valvecovers with no holes in them is pressed into a hole in the front of the intake manifold, in front of the waterneck. To use no hole covers you need to have an intake with this hole in it. Most aftermarket intakes do not have this hole, unless they are from the late 70's aftermarket time period or older, modern aftermarket SBC intakes don't have it.
Forgive the confusion, but are you referring to the Moroso valve covers I mentioned in the first post, with the two holes for the breathers? I have seen the ones that are completely solid with no holes and never thought they would work on my motor because they were meant for the set up you are describing.
 

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Discussion Starter · #11 ·
Oh that's a nice and simple setup. So, you don't ever have any oil shooting out of the breathers? My last experience with these valve covers was when the previous owner of my '95 Impala SS had installed these type of covers on the LT1 and had removed the factory hoses for some chrome breathers. But it kept spilling oil.
 

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Never had problems, I ran this motor for about 10k with no breather cap on one of the covers, once thought about stuffin a cotton ball with tape or somethin but now ive romoved the old plugs and putting in new rubber gaskets and breather.
 

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Discussion Starter · #13 ·
ductape&monkeywrench said:
Never had problems, I ran this motor for about 10k with no breather cap on one of the covers, once thought about stuffin a cotton ball with tape or somethin but now ive romoved the old plugs and putting in new rubber gaskets and breather.
That's very interesting to read. I remember when I discussed the oil spilling from the breather on the aftermarket valve covers with a rep at the local NAPA. He swore the motor would die on me very quickly if I put the stock hoses back on with the aftermarket valve covers. Back then, not knowing much of anything about engines, I became quite nervous and even now, for the life of me, still cannot figure out why he would have come to that conclusion.
 

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lt1silverhawk said:
Forgive the confusion, but are you referring to the Moroso valve covers I mentioned in the first post, with the two holes for the breathers? I have seen the ones that are completely solid with no holes and never thought they would work on my motor because they were meant for the set up you are describing.
I was referring to covers with no holes at all, for anything, like early small block valvecovers. Not the Moroso covers pictured, they have oil fill holes in them, also used for breathers. You can get a rubber plug "oil cap" for this style cover if you need to fill a hole and don't want a breather.

I read your first post as referring to valvecovers that have no hole at all when you posted "no oil fill cap", for either oil fill or PCV. Must be you were just referring to covers with a twist-in cap that locks itself in place, like stock 1970-up valvecovers??
 

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Discussion Starter · #15 ·
ericnova72 said:
I was referring to covers with no holes at all, for anything, like early small block valvecovers. Not the Moroso covers pictured, they have oul fill holes in them, also used for breathers. You can get a rubber plug "oil cap" for this style cover if you need to fill a hole and don't want a breather.
Got it.




ericnova72 said:
I read your first post as referring to valvecovers that have no hole at all when you posted "no oil fill cap", for either oil fill or PCV. Must be you were just referring to covers with a twist-in cap that locks itself in place, like stock 1970-up valvecovers??
Sorry. It is now obvious to me that the title is misleading and thats my mistake. I didn't even think about the completely solid covers when I wrote that. Again, my apologies for the confusion. But you got it right, I was referring to the twist-in cap style valve covers. Thanks for the info! :thumbup:
 

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Discussion Starter · #16 · (Edited)
So I was browsing Craigslist again today and ran across a style of valve covers I have never seen before. These valve covers have tubes protruding from the sides.

I am guessing that those tubes are where the breathers would go. Or are they used for something else entirely?

If they are used for breathers, is there something to be gained by having them on the side of the valve covers (aside from clearance)?





EDIT: This set from the same seller has smaller tubes. The ad says thay are valve spring oilers.

 

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The covers with the big tubes are meant for use with the breather crossover tube, commonly seen on Sprint Car engines. Use on a street engine will require you to fab up a crossover or some other type of connection.

The ones with the valvespring oilers are connected to the engine's oil pressure system, to constantly spray the valvesprings with oil for cooling. Generally only needed for high rpm/long duration racing to keep the valvesprings alive for the entire race. Not needed on the street or strip.
 

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Discussion Starter · #18 ·
No wonder they are kinda cheap ($25 and $40, respectively). The blue ones look cool and would probably make a good conversation piece.


Thanks Eric! :thumbup:
 
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