[TR] Fwd: Oil Filter Adapter - Pot. Problem?

[Michael Porter]

On 8/23/2011 5:07 PM, Chris Simo wrote:
> I used blue loctite on mine and torqued it down. Tightened the filter hand
> tight and upon next filter change the adapter spun.
>
> I had a suggestion to use the copper sealant on the adapter to purolater
> fitting from someone who had the same issue.
>
> Any other solutions out there?
>
>
>

As far as bolt breakage and leakage, these events likely have to do with 
the fact that the adapters can't be exactly matched to the mounting 
surface of the block.  In the case of the spin-on adapters for use with 
six-cylinder blocks (and I suspect there are similar issues with the 
wet-sleeve engines), the adapter can't compensate for varying depths of 
the seal land in the block.  Let's say that the outer land of the 
adapter can't fully engage the seal in the block land because it's not 
deep enough.  The inner land will butt up against the block, and no 
amount of torque on the retaining bolt will prevent the outer seal from 
leaking, thus encouraging the installer to overtorque the bolt.

Conversely, if the block land is too shallow, the outer seal will be 
over-compressed trying to get the inner seal to contact both the block 
and the adapter, possibly damaging the outer seal and if the inner seal 
doesn't contact both block and adapter, unfiltered oil mixes freely with 
filtered oil, thus negating the usefulness of the filter.

Because of these production variations on the block side, the adapter 
has to be matched to the block or to the existing right-angle filter 
adapter, and that requires, in most cases, some machining.  If the 
adapter leaks (apart from casting flaws), or the retaining bolt breaks, 
or the adapter does not remain in position, one can be fairly certain 
that there's a geometry mismatch somewhere, and it's advisable to let a 
machinist examine the parts and fit them to each other if one can't do 
the work at home.


Cheers.

-- 


Michael Porter
Roswell, NM


Never let anyone drive you crazy when you know it's within walking distance....