OK so I had a cluster from an older 115 that had the old temp gauge, but
just hooked up the oil pressure gauge. With this one I get about the
same results but it may read about a needle width higher, so it sits
about in the middle between 15 and 0. This engine defies everything I
have ever observed with these old diesels. Every single other one I
have had, when you change the oil, as soon as you start it up, the oil
is black right away. On this engine, I have run it probably 30 minutes
or more total since changing the oil and it looks like it just came out
of the bottle on the dipstick. I have never in my 25 years of messing
this these have I seen that. Very odd. HF has a kit for testing oil
pressure with all sorts of adaptors, I may get that and see if one of
them fits this car and test it with that. It is highly possible the
test cluster I put in also reads low. I suppose I could try using the
pressure gauge out of a 123 and see what it reads, but other than that,
I am just about inclined to call it within spec and just drive it until
it blows up. I will still pull the valve cover and see what is going on
there. Otherwise, this thing seems about like a brand new motor, no
blowby, oil stays clean even after running it a bit. I am perplexed.
On 4/6/2014 10:00 AM, Kaleb C. Striplin wrote:
I do not think the 617 has the plastic connectors, but will check cam
towers if it comes down to it.
On 4/6/2014 9:57 AM, Peter Frederick wrote:
A broken plastic insert in the oil line to the cam bearings is a well
known reason for low idle oil pressure on many MB engines. I've also
heard of a cracked cam tower causing low idle oil pressure, and they
do break on occasion, they are aluminum.
A lot cheaper than an engine overhaul, and also something that could
develop while driving.
Peter
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