[Mgs] Oil filter sealing

Barney Gaylord barneymg at mgaguru.com
Mon Mar 10 07:59:08 MDT 2014


More like bend from physical impact.  Did you ever havr a broken 
engine mount?  I have use an identical filter mount on my MGA for 
decades with no such problem.  Thin aluminum castings don't usually 
hold casting stresses, but they can bend fairly easily.

Barney Gaylord
1958 MGA with an attitude

At 01:09 PM 3/10/2014 +0000, PaulHunt73 wrote:
>Anyone seen this before?
>I've had the roadster (1973 with inverted filter on an adapter) 25 years and
>changed oil and filter annually. For years I never had a problem, then started
>getting a spurt of oil from the new filter at first start, about an egg-cup
>full, then it sealed itself and no further problem. Then it started getting
>worse. A couple of years ago I had to remove and reseat the filter, checking
>the seal and the face on the filter head, before it would seal. Then last year
>I had to remove and replace four times, and use a second new filter, before it
>sealed. I thought there must be a problem with the filter head so got a
>2nd-hand one.
>This year I removed the old filter and looking at the filter head the sealing
>face seemed obviously warped, something I had not noticed before. I got a new
>filter and smeared copper grease round the seal, and screwed it on till it
>just touched. Removed it, and the grease had transferred to just two areas 180
>degrees apart, with about as much area again showing no grease. Regreased the
>seal and fitted it again, this time tightening it by half a turn after
>contact. Removed it again, and this time grease was showing about 3/4 the way
>round the sealing face, no grease top right, where it has always spurted
>Checked the replacement filter head and that was dead flat, filter sealed all
>the way round as soon as it touched. Swapped the filter heads (stressing about
>a seized adapter fixing bolt, but it was barely finger-tight!) and with a new
>filter on the old head when the seal was just touching at two opposite sides
>there were gaps between them, one of them being 65 thou. You can see daylight
>right through as in the attached. Tightened by half a turn it was still 25
>thou where it has been spurting from.
>New filter head has sealed just fine. The original filter head must have been
>warping gradually over the years, as I can't imagine how multiple filter
>manufacturers could have contrived to change their seals, gradually and in
>unison, such that a fixed warp on my filter head gradually got harder to seal.
>But I guess I'll never know.
>Mgs at autox.team.net
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