FE Power Forums
FE Power Forums => FE Technical Forum => Topic started by: preaction on January 02, 2024, 03:21:50 PM
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Did some FE's come with a oil galley air bleeding valve that looks like an oil galley plug/cap with a jiggle valve in it ? What years ?
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Yes early FE’s up to approximately 64?
I’m not sure what year they stopped.
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Yes, they stopped in '63, I believe, with the cam trust plate modification.
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You asked this on FB earlier, expecting a different answer?
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Have to laugh. There's so much misinformation on Facebook, how could anybody believe anything that is on there? ;D ;D
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Paul, I didn't see the FB post, but you don't see a lot of them, it's the old stuff. As I understand, the early blocks had it because they didn't have the front wall valley drainback hole
I never saw any definitive documentation, but assume it was not a bleed, but a way to oil the chain.
Did you run across one with a jiggle valve?
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Ross, I don't have a Facebook account. ;) None here I ran across one and didn't know what year it's use was dropped.
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Have to agree with Ross.. My engine machinist puts one in for chain lube...
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I've only seen one in an FE that I can remember. It was a very early block. Never have used one though, the chain gets plenty of oil otherwise, even without the drain above it.
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In 9/2021, there was a thread where this was addressed:
https://fepower.net/simplemachinesforum/index.php?topic=10427.75
It looks like the hole in the front of the china wall, was added in '59
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In 9/2021, there was a thread where this was addressed:
https://fepower.net/simplemachinesforum/index.php?topic=10427.75
It looks like the hole in the front of the china wall, was added in '59
Amazingly enough, the ebay listing for a '59 block that Brent mentioned in that thread is still active after 3 years. :o
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I guess another opinion won't sink the boat; but I feel confidant that the "rattle" valve plug was intended, with the advent of the application of hydraulic lifters (first example FE's were mechanical), as a simple execution to allow air which inevitably will have accumulated in the main gallery and below down to the oil pump when the engine is not operating, to be purged more quickly, rather than having to push it though the clearance restrictions about the valvetrain, this in order that the system might be "charged" with pressurized oil fluid more quickly in order to better maintain silence on start-up. :)
Later, this was deemed unnecessary and was eliminated (cost cutting, probably saved maybe five cents on each plug; but that times how many engines? :o ), and I would doubt drain-backs had anything to do with it as this process would be labeled as unreliable; and as far as oil delivery to the timing gear, this is mostly handled by the high pressure oil ejected out of the clearance area of both the first main and cam bearings. And I'd probably pass on the plan of drilling a hole in the main gallery plug for greater oil volumes for the T.C. set, as it isn't needed, and isn't it the FE guy's that are restricting oil delivery to the upper valvetrain (where it might actually do some good :o ) for greater supplies thought to be needed for the bottom-end? And also you do know that excessive fluid volume needing to be displaced at the chain to gear or gear to gear junctures can be counter productive in high-speed applications. ;)
Scott.
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Just to add to the confusion. I'm currently building one that had a jiggle pin. It was a complete virgin with a 6D26 date code. C6MEA block with all original Ford internals.
Later, Travis
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Air purge is the best bet. Actually an accepted "cure" for start up rattles in BBC applications many years ago. They suggested drilling a very small hole in the lifter galley end plug. Never tried it or even looked - but I wonder if that jiggle pin would "seal up" once a solid slug of oil was hitting it instead of just air. That might explain the complication of having a jiggle pin instead of just a hole....
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It seals as well as a flat peg in a round hole :)
I believe it is designed to swirl and flap around, to spay oil all over the back of the chain and sprokets.
I'll be gone today but, I'll take a picture of mine tomorrow.