wasnt there something about the big bolt where the distributor
would mount if it was a gas car having something to do with the
oil pump? I seem to recall something about this from years ago.
On 4/28/2011 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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