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| Valve Cover cork gasket (Page 3/4) |
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Patrick
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JUL 29, 05:17 PM
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pmbrunelle
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JUL 29, 07:36 PM
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| quote | Originally posted by Patrick:
I don't understand what this "dead end" area is. 
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Here is a picture to explain what I mean by dead end:
RTV itself becomes airtight as it cures, so as the outer layer cures, it makes it harder for the inner parts to cure.
Here is the datasheet for Loctite 5910, a flange sealant I am familiar with that can be used for this sort of thing.
On the first page of the document is a graph showing how the "Depth of cure" varies with time:
https://datasheets.tdx.henk...TE-SI-5910-en_GL.pdf
| quote | Originally posted by Patrick:
This is a photo of the original oil pan coming off my Subie. You can see grooves in the oil pan. The new pan has them as well. Are there any "dead end" areas evident here? How does this differ from a valve cover? I'm genuinely interested!
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There are some slight debossed regions in the sealing flange; in the event of crankcase pressure, this makes it harder for the pressure to blow out the RTV; the RTV that flowed into the debossed region acts like a key which locks it in place.
These debossed regions appear shallow to me; they don't have the depth of the Fiero valve cover groove.
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Interestingly, I used RTV to seal a flat metal spacer to my Fiero's cylinder heads:
https://www.fiero.nl/forum/...L/142133-9.html#p354
This joint has been leak-free, but it does not have a groove either...
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Patrick
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JUL 29, 08:22 PM
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| quote | Originally posted by pmbrunelle:
Here is a picture to explain what I mean by dead end:
 | | CLICK FOR FULL SIZE |
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Does the valve cover actually sit way above the head like that, or would it sit more like the following image? (The use of non-factory valve cover bolts without the shoulder might be required if RTV was to be used.)
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pmbrunelle
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JUL 29, 08:35 PM
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| quote | Originally posted by Patrick:
Does the valve cover actually sit way above the head like that, or would it sit more like the following image? (The use of non-factory valve cover bolts without the shoulder might be required if RTV was to be used.)
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I drew the valve cover position roughly as it sits with the rubber gasket.
I'm not sure how low the valve cover would go without a rubber gasket; my memory is insufficient.
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Cruzenoob
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AUG 03, 08:20 AM
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| quote | Originally posted by Patrick:
So you're saying the shipping fee to Austria is €47.76 ($51.86US) for a set of €12.24 ($13.31US) valve cover gaskets? |
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Patrick... I don't understand why you always question everything. I see on many posts people ask for help and you just comment anything, no offense, but yes... shipping a pair of gasket around the world costs money...
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Cruzenoob
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AUG 03, 08:22 AM
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| quote | Originally posted by Vintage-Nut:
You Have a Choice: Properly or Not.
To me, find the right gaskets and start with calling Local Auto Shops.
If Local Auto Shop will not stock or order the correct set; then look on Amazon / Summit / Jegs / Rock Auto or search FEL-PRO VS50077R gaskets for the 'cheapest' shipping to Austria
Or "Mickey Mouse" it by squeezing tubes of RTV......this is your decision.
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Thank you, that's a solution I was thinking too, but then I decided to put high temp silicone on the surface where the gasket will sit on, the there's the cork gasket stuck inside and on bottom will be silicone to fill the remaining gaps. I just saw 2 days ago a german us oldtimer shop sells 2 sets of the proper silicone gaskets for like 7€ per set (which is very cheap and for around 25€ shipping fee on top, the last 2 sets) If the cork fails, then I'll be able to change them with proper ones.
See photo what I mean the Area (I don't know what you call it in english)
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Cruzenoob
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AUG 03, 08:41 AM
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| quote | Originally posted by pmbrunelle:
RTV cures with exposure to air. When a bead is thick, the RTV near the centre can only cure by breathing through the thickness of the RTV surrounding it. In general, there is a maximum joint thickness that is recommended for a given RTV product.
In this case, in the groove, there is a "dead end" of RTV with little air exposure. This area may not cure properly.
A joint that is designed for RTV will not have a dead-end like this.
RTV on the Fiero V6 valve cover remains a "Mickey Mouse" solution; I suggested it as the least bad alternative that OP can try since using the correct gaskets appears to be a no-go. |
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Hello pmbrunelle, I was thinking the same, here is a selfmade illustration I am also not 100% sure how it seals it. I know what you mean by not sealing in the center cause the outside will harden and the inside remains soft, but I think for that to happen it's kinda unlikely, since that silicone layer is not that big and I let it cure for more than 24h atleast.
I did put some "RTV"? (temp resistance silicone on the gasket surface before placing it.
Do you maybe know how it seals it from oil, is it like oil splash or will the valve cover be filled to a certain point with oil? Because if it just splash and not pressurised oil shooting out I think it might be fine.
As always thanks to everyone for any solutions and help.
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Cruzenoob
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AUG 03, 08:53 AM
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| quote | Originally posted by pmbrunelle:
I drew the valve cover position roughly as it sits with the rubber gasket.
I'm not sure how low the valve cover would go without a rubber gasket; my memory is insufficient. |
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Or I think it is more likely looking like this:
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Patrick
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AUG 03, 03:11 PM
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| quote | Originally posted by Patrick Here:
So you're saying the shipping fee to Austria is €47.76 ($51.86US) for a set of €12.24 ($13.31US) valve cover gaskets?
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| quote | Originally posted by Cruzenoob:
yes... shipping a pair of gasket around the world costs money
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And it would necessarily be €47.76 ?
| quote | Originally posted by Cruzenoob:
Patrick... I don't understand why you always question everything. I see on many posts people ask for help and you just comment anything, no offense
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I often ask questions to dig a little deeper into what's been mentioned, much like I tried to do immediately above. It only took a few seconds to discover that there are shipping options less expensive than what had been previously discussed.
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Cruzenoob
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AUG 04, 01:54 PM
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| quote | Originally posted by Patrick:
I often ask questions to dig a little deeper into what's been mentioned, much like I tried to do immediately above. It only took a few seconds to discover that there are shipping options less expensive than what had been previously discussed.
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That's exactly what I mean, Instead of replying to help, you come up with questions that don't help solve the problem. And now include prepay custom charges, you get almost 50€ if nothing else get's added up later.
To think you took your time to sit down, lookup on rockauto what the shipping fee cost and post it here just to be in the right like this is a debatte, is actually insane. By all means and no bad intenstions, either help or just let it be.
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