Hmm. Why does my Mann oil filter look weird cf the Mahle?

Message

Johnny Graham · #1 Post by **Johnny Graham** » Sun May 25, 2008 12:55 pm

Just about to install a new filter after oil change and the Mann filter supplied (by a reputable 356 supply emporium) looks completely different to the mahle one coming out - the Mann is almost entirely clad in metal with small perforations - whilst the mahle has no metal claddding - just exposed filter element.

I'm sure the Mann filter is fine ( I suppose) - just curious as to how two things that do the same job can look so different...?

Ron LaDow · #2 Post by **Ron LaDow** » Sun May 25, 2008 10:28 pm

Johnny,

"Just about to install a new filter after oil change and the Mann
filter supplied (by a reputable 356 supply emporium) looks
completely different to the mahle one coming out - the Mann is
almost entirely clad in metal with small perforations - whilst the
mahle has no metal claddding - just exposed filter element.
I'm sure the Mann filter is fine ( I suppose) - just curious as to
how two things that do the same job can look so different...?
Johnny"

So little oil flows through the stock filter (~8% of the total flow; I think the article is on the Resgistry web site) that about any design will work, so long as it physically fits in the can. No real reason for design convergance as typically happens when the parameters are more tightly defined.
Thanks,
Ron LaDow

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Guest · #3 Post by **Guest** » Mon May 26, 2008 12:28 pm

Johnny,
Both will work fine. The oil flow is very slow through the filter.
If you look at the size of the banjo bolt at the bottom of the feed line
you will see that the filter is feed through a hole about 1 mm in
diameter, so the flow is very slow.

Alan

Johnny Graham wrote:

Just about to install a new filter after oil change and the Mann
filter supplied (by a reputable 356 supply emporium) looks completely
different to the mahle one coming out - the Mann is almost entirely
clad in metal with small perforations - whilst the mahle has no metal
claddding - just exposed filter element.

I'm sure the Mann filter is fine ( I suppose) - just curious as to how
two things that do the same job can look so different...?

------------------------------------------------------------------------

Cheers!
Johnny
Registry#19478

1965 356C Bahama yellow #222499
1989 911C4 Daily driver

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Johnny Graham · #4 Post by **Johnny Graham** » Mon May 26, 2008 5:57 pm

Thanks for the explanation guys. Maybe the toilet paper filter is worth a try next time..

Ron LaDow · #5 Post by **Ron LaDow** » Mon May 26, 2008 6:12 pm

Johnny,

"Thanks for the explanation guys. Maybe the toilet paper filter is
worth a try next time.. [Shocked]"

Or you could try one of these: http://www.precisionmatters.biz/full-fl ... ter-us.php
(blatant self-promo)
Thanks,
Ron LaDow

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Johnny Graham · #6 Post by **Johnny Graham** » Tue May 27, 2008 6:35 am

Wow. No pipes, can be fitted without dismantling the engine..I am certainly interested in this system. Let me give it some thought.

Johnny Graham · #7 Post by **Johnny Graham** » Tue May 27, 2008 9:07 am

OK - so I can fit this system myself simply by replacing the oil pump cover with this fitting? If the DIY kit is used, it can be done without even dropping the motor?

A bolt-on, effective full flow system for $500 sounds like a no-brainer to me. What's the catch?

Ron LaDow · #8 Post by **Ron LaDow** » Tue May 27, 2008 1:15 pm

Hmm. Looks like my reply didn't go to the list
Posting as Precision Matters

"OK - so I can fit this system myself simply by replacing the oil
pump cover with this fitting? If the DIY kit is used, it can be
done without even dropping the motor?
A bolt-on, effective full flow system for $500 sounds like a
no-brainer to me. What's the catch?
Johnny"

Not quite a bolt-on: http://www.precisionmatters.biz/backstory-clean-oil.php
The DIY kit is an aid to folks who don't have spare gaskets and it makes scribing the case for the notch easier. It is not required for installation.
Thanks,
Ron LaDow

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