Already planning on pulling the manifold. I don't really see any
other way to get good access to them. :(
Marshall had noted a value of .6 ohms as being nominal. I assume
this is for any parallel plug, but I wasn't sure.
Regarding the fuse, I'm sure the car has one, but it does not appear
to be on the relay as with other MB diesels I've seen. I'll have to
look again and see if I can track it down.
I knew I had at least one (probably 2) glow plug dead for a
while. The car still started OK, but was obviously missing on one
more more cylinders until it warmed up for a bit. With another plug
gone, the car still starts fine but misses BADLY one at least two
cylinders and smokes pretty bad for a minute or two after cold startup.
I'll check the plugs tomorrow while I've got the car in the garage to
do the brakes.
Thanks.
J.B.
At 04:17 PM 10/7/2005, you wrote:
On Fri, Oct 07, 2005 at 12:22:50PM -0400, J.B. Hebert wrote:
> Car is a '95 E300D. It appears that I've lost another glow
> plug. Since I had been limping by with at least 1 or 2 plugs gone,
> this puts me at 2 or 3 plugs gone and the weather is only getting
> colder. I can't seem to find the acceptable resistance to ground
> email that went around a while ago. Can someone resend it? I should
> be able to test the plugs at the relay connector, correct? Also, is
> there a GP fuse on later 124 chassis cars like mine? I popped the
> cover off my GP relay and didn't see the familiar strip fuse like on
> my 123 chassis car. Is it located elsewhere now? I'd like to pick
> up some spares before winter if required.
The testing procedure I use for any car to test if the glow plug is good
or not is simple - measure the resistance through the plug. If the
meter thinks
that the plug is a dead short AND I haven't blown a fuse, it's fine. If the
resistance is higher than a couple of ohms, it's on its way out. If
the resistance is infinite, then the plug is definately dead.
The only thing that this did not catch was carbon tracing playing with the
resistance of one plug in a series plug setup (which you don't have). The
plug with the carbon was fine, but the one after it wasn't getting
enough juice
to light up.
Your car should have a strip fuse. Rusty's web page lists them for about a
buck and a half. I don't know where it is located on a 124, should probably
figure that out.
For what it's worth, a six banger will start fine but idle rough on one plug
as long as it's not too cold. If you lose two plugs, it'll take forever to
start and smoke like a volcano when it does light off.
While you're ordering parts, I am pretty sure your 606 has the plugs buried
in the intake manifold like my 603s and 601, so you might want to just bite
the bullet and yank the intake manifold to make things easier on yourself and
your knuckles.
Good luck...
K
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J.B. Hebert
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Current Vehicles:
'76 Ford Bronco
'78 Volvo 262C Bertone V8
'80 Alpina B7 Turbo Coupe
'82 Mercedes 300CD (Deceased)
'93 GMC Sierra 2500
'95 Mercedes E300D
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