Do the noises go away as soon as the pressure comes up?
When you first described the problem I figured it was just normal, my 240D
seems slow but on my car its more like 2-3 seconds with no real scary noises, 5
seconds with noises is wrong.
I don't have any 102 engine experience per-say and apparently the oil filter
arrangement is different than the OM6xx since on those the filter cap has a big
spear down through the filter. The spear has 2 rubber o-rings and when they get
old and hard the pressure is slow to rise. If you didn't absolutely know the
o-rings weren't there I'd still give a check for them, wipe down the spear
thing (assuming your car has one) and look for grooves near the last 1/4 of the
spear, there should be o rings on them. The o rings do not come with the oil
filter, you have to order them separately.
-Curt
Date: Thu, 16 Jul 2009 12:24:32 -0500 (GMT-05:00)
From: Robert Bigham <edward_baldh...@earthlink.net>
Subject: Re: [MBZ] Will the real expert on oiling system of Engine 102
please stand up? Time lag
To: mercedes@okiebenz.com
Message-ID:
<13927006.1247765073109.javamail.r...@elwamui-mouette.atl.sa.earthlink.net>
Content-Type: text/plain; charset=UTF-8
Hello Wilton; I'm baaaaack !
It
seems that from a stone cold overnight wait, it's about 5 seconds from
the time the engine starts until oil pressure is shown on the dash
gauge. During that time the engine makes little metallic tapping and
clicking noises.
>From a 1 hr rest period and a semi-warm
restart, it's more like 1 second from the time the engine starts until
oil pressure is shown on the dash gauge.
I haven't had an
opportunity to restart after a real road trip and a rest, but I can
tell you it's slow, and the engine makes larger metallic tapping and
clicking noises, which some have dismissed as "timing chain rattle," or
something like that, until the dash gauge indicates oil
pressure. These noises are big enough that my son the race engine
builder was impressed by the noises.
I'm sure there can't be a
whole lot wrong, because I can cruise at 80 mph all day (I don't like
to drive a whole lot faster than that). I have almost no noticeable
oil consumption. I have driven the car at indicated 105 mph and it had
some left. Total indicated mileage 155, 7xx miles. Mileage driven by
me 31,000 so far.
Thanks for your interest. I'll be interested to see what you think.
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