Your basic description is accurate. The cartridge goes in the can and
the nylon doodad with the mesh in it goes on top. A bit of a devil to
get it all back into the car as there is not a whole lot of room. I have
found it helps a lot if I put the car up on ramps before hand so that I
can get far enough under to see if I appear to be lined up. It is
possible to get the bolt in the wrong spot and to bend the edge of the
canister if one tries to tighten it up without it being aligned
properly. Cannot recall if there are any o-rings on the bolt. I don't
think I have ever changed any.
Randy
On 28/04/2011 10:08 PM, Dieselhead wrote:
MY recollection is that the OM615 and early 617 have a smaller can
than the OM621. It is in essence, a fram C3 filter size. I never
changed oil on a 615, and Randy should be able to confirm this. I
think it is the same as the 621, where the oil filter cartridge is
only the bypass filter. There is supposed to be a spring in the
bottom of the can. Then the cartridge, then the main filter. The
main filter is a reuseable plastic thing link 4 saucers stacked like
this: ()() When you put the can on the engine, you have to push the
main and cansiter filters down, hold them down with ine finger until
you get the can pressed up against the housing, then screw in the bolt
that holds the can. There are no stem orings like on the 123 OM616/7
and OM60x engines. I have seen 621s with NOTHING in the filter can
that hold good oil pressure. I don't think the problem is there, but
theyre MAY be a valve in the can that controls main vs bypass. If all
the oil is diverted to the bypass, the oil pressure might drop as in
this case.
I would expect more like low pressure until the whole can is
pressurized, then normal pressure, if all the flow went to the bypass
filter. If anyone has a 615 book or a 617 book, this should be able
to be confirmed or refuted.
Maybe, I was trying to remember if those have the o ring deal like
the later cars
Sent from my iPhone
On Apr 28, 2011, at 8:35 PM, Rick Knoble <rickkno...@hotmail.com> wrote:
I have never heard of bearings wearing out on one of those,
usually the rings would wear out first and it would just loose
compression. The usual cause of bearing problems is it leaks oil
and they let it run out and it causes problems, but then you get
noise. This car has no noise at all, nothing. It is a mystery
indeed.
Oil pressure was down to below .5 bar hot, and would only peg the
gauge at 80mph. That was before anyone did anything... with fresh
Delvac 1300 15w40. It got worse after the dealer oil change.
The hope was that the pressure limit valve was the culprit, but
the bearing shavings in the filter (after only 20 miles of
driving) suggested otherwise.
Wouldn't the oil filter o-ring being bad or missing cause low oil
pressure?
Rick
Who knows nothing about anything older than a 123
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