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| '87 2.5L valve cover replacement (Page 2/4) |
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Patrick
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JAN 22, 07:22 PM
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| quote | Originally posted by waynrayn:
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Those go on the outside!!! On top of the valve cover!
Don't worry about the "divot in the flange". They were for the original style of gasket.
Do you have the correct valve cover bolts... the ones with a shoulder?
If you're running a Windows PC, use PIP to post images here. Max width - 1024 pixels. Max file size - 300 kb.[This message has been edited by Patrick (edited 01-22-2019).]
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waynrayn
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JAN 22, 07:39 PM
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Sure, it makes sense that the force spreaders in fact go on the outside of the cover. That was just an attempt on my part, to see what worked. But that still leaves me with the problem in picture number 3, a big gap between the narrowed gasket and the flange divot (gap). If I torque that really hard to close the gap, it will likely bend the flange badly.
To me, the valve cover flange should be uniform all the way around, without gaps- in fact my old one appears to be, although I haven't taken it off yet- and so should the gasket- it should not have impressions narrowing it in spots.
Why are it and the flange designed this way, and how is it installed without leaks?[This message has been edited by waynrayn (edited 01-22-2019).]
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Patrick
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JAN 22, 07:42 PM
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| quote | Originally posted by waynrayn:
That was just an attempt on my part, to see what worked.
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Well, what you pictured obviously doesn't. 
Read what I added to my previous post.
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waynrayn
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JAN 22, 07:48 PM
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The new valve cover bolts appear to be the typical hexagonal bolts that I already have in the old cover. There are seven in the package, as well as o-rings and washers. [This message has been edited by waynrayn (edited 01-22-2019).]
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Patrick
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JAN 22, 07:56 PM
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It's possible they're different, but I thought the duke valve cover bolts would be the same as the ones for the V6.
The shoulder prevents the gasket from being squished too much (and possibly distorted/destroyed) from over-tightening the bolts.[This message has been edited by Patrick (edited 01-22-2019).]
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waynrayn
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JAN 22, 08:07 PM
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I see... Thanks for the picture. Yours have a small lip under the hexagonal head, then the shoulder, and then an o-ring, it looks like. My old ones, still in the cover, just have the lip under the hexagon. No shoulder or o-ring. The new ones still in the package have no lip or shoulder, just the hexagon. This wasn't a concern to me, as I intended to use the force spreaders.
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waynrayn
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JAN 24, 07:32 PM
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I went to three auto shops/parts dealers, to ask about my problem with this gasket ("Fel-Pro VS50179T") and valve cover (("Dorman 264-905").
All three places said that while the gasket shape fits, it is poorly designed to seal in oil, because as I said above, it tapers around the bolt holes, right where the valve cover flange coincidentally gaps:
... They recommended a cork gasket. This is uniformly thick, and the design makes total sense to me:
Except that it's crappy cork, will need a ton of RTV, and I hate it.
... So why is the (expensive) PermaDry Plus gasket designed this way? More so, why is everyone in the forum recommending these, and not having trouble with them?
I figure it's one of two things: Either your Dorman valve cover flange doesn't have any gaps like this one (where did you buy it?), or your Fel-Pro gaskets have tabs sticking out, that fit into the gaps in the flange, to provide a seal.
Can anyone explain this?
Thanks,
Wayne[This message has been edited by waynrayn (edited 01-24-2019).]
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David Hambleton
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JAN 24, 09:16 PM
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The rubber cylinders around the bolt holes will seal the gap when the bolts are tightened.
The adjoining ribs have to taper to the same level as the hole cylinders to ensure continuous contact adjacent to the hole cylinders.
The ribs between the holes will be squeezed down by the rocker cover to seal between the holes.
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waynrayn
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JAN 25, 12:13 AM
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Hi David:
Thanks very much for the detail in your explanation. It gives me enough assurance to go ahead with the Fel-Pro gasket.
Best regards,
~W~
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Patrick
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JAN 25, 03:10 AM
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| quote | Originally posted by waynrayn:
I went to three auto shops/parts dealers, to ask about my problem with this gasket ("Fel-Pro VS50179T") and valve cover (("Dorman 264-905").
All three places said that while the gasket shape fits, it is poorly designed to seal in oil, because as I said above, it tapers around the bolt holes, right where the valve cover flange coincidentally gaps...
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Did you talk to a knowledgeable mechanic at any of these shops, or just to some parts jockey behind a counter?
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