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> spark plug seals, in or out...
yeahmag
post Sep 10 2017, 04:30 PM
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Is the general consensus still to push the rubber seal for the spark plugs INSIDE the cylinder tin (so it seals) under pressure?

-Aaron
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injunmort
post Sep 10 2017, 04:51 PM
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mine have a groove that slips into the tins, positive seal at all times
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Porschef
post Sep 10 2017, 05:39 PM
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What are those, Mort? That makes the most sense...
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Elliot Cannon
post Sep 10 2017, 05:53 PM
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QUOTE(yeahmag @ Sep 10 2017, 03:30 PM) *

Is the general consensus still to push the rubber seal for the spark plugs INSIDE the cylinder tin (so it seals) under pressure?

-Aaron

I push mine down thru the hole. Positive seal under pressure.
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SO.O.C914er
post Sep 10 2017, 08:37 PM
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Do you see any difference when there pushed inside. Mine are just resting on the outside not tight at all (IMG:style_emoticons/default/idea.gif)
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MartyYeoman
post Sep 10 2017, 10:04 PM
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QUOTE(injunmort @ Sep 10 2017, 03:51 PM) *

mine have a groove that slips into the tins, positive seal at all times


I've been looking for just that type of seal system. Where did you get yours?
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michael7810
post Sep 11 2017, 06:45 AM
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QUOTE(Marty Yeoman @ Sep 10 2017, 09:04 PM) *

QUOTE(injunmort @ Sep 10 2017, 03:51 PM) *

mine have a groove that slips into the tins, positive seal at all times


I've been looking for just that type of seal system. Where did you get yours?


Looks like a new product idea for 914rubber??
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Elliot Cannon
post Sep 11 2017, 07:29 AM
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QUOTE(michael7810 @ Sep 11 2017, 05:45 AM) *

QUOTE(Marty Yeoman @ Sep 10 2017, 09:04 PM) *

QUOTE(injunmort @ Sep 10 2017, 03:51 PM) *

mine have a groove that slips into the tins, positive seal at all times


I've been looking for just that type of seal system. Where did you get yours?


Looks like a new product idea for 914rubber??


I use the regular seals and just push them through the holes with a screw driver.
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NFBrown
post Sep 11 2017, 08:00 PM
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Corvair engines had a plug seal that snapped into the tin. I wonder if they could be adapted.

Nick
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Mikey914
post Sep 13 2017, 10:49 AM
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Let me check I may have one that would work nicely.
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MartyYeoman
post Sep 13 2017, 12:35 PM
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Something like this. I'm not sure of the hole size of the in Corvair's tin and if it will work for the 914 tins.


Attached thumbnail(s)
Attached Image
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NFBrown
post Sep 13 2017, 05:01 PM
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Looks like it's worth a try. I think I'll order some.

Nick
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Mikey914
post Sep 13 2017, 06:29 PM
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Checked my grommets, and the one that would work nicely was a little too small. (IMG:style_emoticons/default/headbang.gif)
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injunmort
post Sep 14 2017, 10:13 AM
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beru set from partsgeek, about $24.00
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Mikey914
post Sep 14 2017, 01:47 PM
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Beru is exactly the same, it's an in or out also. I have a set in my hands.
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euro911
post Sep 14 2017, 01:55 PM
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If you push the seals down on the barrel of the connector prior to pushing them onto the plugs, they seal just fine (as designed by the factory) (IMG:style_emoticons/default/shades.gif)
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Mikey914
post Sep 14 2017, 01:58 PM
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Yes, it looks like they will hold some tension. But not a "grommet" type of fit if that's whats wanted.
Mark
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MartyYeoman
post Sep 15 2017, 01:03 PM
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You're correct, Mark. Grommet fit is the goal.
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Rand
post Sep 15 2017, 01:43 PM
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There isn't that much pressure under there!! The idea that pressure will push the rubber against the underside of the tin hard enough to seal is a misnomer. A pretty ridiculous one.

Use all the gauges you want, try it both ways. You won't notice a difference in head or oil temps. Sometimes we get way out of reality with ignoramus details.
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era vulgaris
post Sep 15 2017, 04:07 PM
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QUOTE(Rand @ Sep 15 2017, 03:43 PM) *

There isn't that much pressure under there!! The idea that pressure will push the rubber against the underside of the tin hard enough to seal is a misnomer. A pretty ridiculous one.

Use all the gauges you want, try it both ways. You won't notice a difference in head or oil temps. Sometimes we get way out of reality with ignoramus details.


(IMG:style_emoticons/default/agree.gif)

Just push them until they seat firmly from the outside. That's all you need to do.
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