<VV> On the subject of Clark's Oil Filter (correction)

[J R Read]

OK - I no longer have the filter which was pictured in the long winded post.
After it was posted, I was looking at it more closely and wondered why there
were no weld marks on the ring (left side of pic).

So I dug an NOS AC-PF4 out of inventory to look at that ring.  Guess what -
no weld marks there either!  Hmmmm...

Next, I was able to (using fingers only) lift both the inner and outer
gaskets out of the spaces between the ring and the (both) inner and outer
portions of the canister (body?) top of the filter.  It appears that the
ring on the PF4 is merely a press (interference?) fit to the top of the
filter body along the inner edge of the ring.

So, the inference becomes - the Clark's filter (in at least some instances)
would appear to have insufficient interference fit where the ring portion
mates up to the top portion of the body of the filter.  The spot welds have
nothing to do with this.  They apparently have something to do with keeping
the filter medium in place within the filter canister.

Later, JR

PS  - PF4 picture below.  Look for the Url.

----- Original Message ----- 
From: "J R Read" <hmlinc at sbcglobal.net>
To: "Dennis Pleau" <dpleau at wavecable.com>; "'VirtualVairs AA'"
<virtualvairs at corvair.org>
Sent: Wednesday, April 18, 2012 12:19 AM
Subject: <VV> On the subject of Clark's Oil Filter


> First, please understand that I'm not trying to bash anyone.  In fact, I
> feel that we Corvair owners are very fortunate to have vendors who are
> willing to expend considerable time, money, energy, and probably more that
> I've not listed in order to fill the needs of Corvair owners.  The PF4
> went
> away and the Clark's organization stepped up to provide a filter which did
> not use that (in my mind) horrible U shaped gasket on the outer edge of
> the
> canister.
>
> Unfortunately, there seems to be a quality issue with those presently in
> the
> supply chain.
>
> While I do not have the ability to determine the precise problem, I AM
> willing to suggest that it might be related to the quality OR the number
> (possibly both) of spot welds which hold the ring to the canister portion
> of
> the filter.  That ring is what holds the square cut rubber gasket (the one
> we like) in place.
>
> Attached is a picture of one I removed from my own car.  Note that the
> welds
> are located centrally between each of the six holes where the oil flows
> through.  So, is there a problem with the quality of welds?  Should there
> be
> two or three welds between each hole?  This is where I'm not qualified to
> answer, but I sure feel strongly that this is a "weak link" in the current
> filter.
>
> Can it be improved?  I suspect that it can, but someone smarter than me on
> filter construction will have to answer that one.
>
> Later, JR
>
>
> PS - there should be a URL below which will take you to the picture.
>
> ----- Original Message ----- 
> From: "Dennis Pleau" <dpleau at wavecable.com>
> To: "'VirtualVairs AA'" <virtualvairs at corvair.org>
> Sent: Monday, April 16, 2012 6:05 PM
> Subject: Re: <VV> Blown Out Clark's Oil Filter
>
>
>> Someone posted a plausible explanation of why this happens I while back.
>> I
>> searched the VV archive and couldn't find it.  I think they work good on
>> some oil filter housing and had a tendency to leak on others.  I hope
>> whoever wrote it will repost or someone who archived it will repost it.
>>
>> dp
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: IMG_0178.JPG
> Type: image/jpeg
> Size: 1004723 bytes
> Desc: not available
> Url :
> http://www.vv.corvair.org/pipermail/virtualvairs/attachments/20120418/8fa97bbc/attachment.jpe
> _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are
> the property
> of the writer, please attribute properly. For help,
> mailto:vv-help at corvair.org
> This list sponsored by the Corvair Society of America,
> http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options:
> http://www.vv.corvair.org/mailman/options/virtualvairs
> _______________________________________________
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IMG_0256.JPG
Type: image/jpeg
Size: 824587 bytes
Desc: not available
Url : http://www.vv.corvair.org/pipermail/virtualvairs/attachments/20120418/a71463aa/attachment.jpe