I drove the car a little bit yesterday and was able to get it to
the point that at hot idle the pressure drops down to about half
way between the bottom and the 1st mark. It pegs when revved up
but without a tach Im not sure what rpm its running. I know that
on flat ground in 4th going about 60 mpg it will be just right off
being pegged. Its not against the peg but its almost there. It
does seem to be low but what I dont get is the fact that this oil
is not pitch black like all other diesel oil I have seen so I
still think it might be something to do with the oil thats in there.
On 4/29/2011 9:31 PM, Kaleb C. Striplin wrote:
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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_______________________________________
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Kaleb C. Striplin/Claremore, OK
99 E430, 99 E320. 97 E300, 95 E300, 93 300D, 92 500SEL,
92 300SD, 91 350SDL, 91 300D, 90 300D, 89 560SEL, 87 300SDL x2,
85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D
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