W123

240D low compression in #1

I have a "rust bucket winter beater" 240D here in MT that starts great above 15 degrees F and really hard below (if at all). I ran diesel purge through the other night and did a compression check. All cylinders were 325-350 save #1 at 180. The valves were adjusted in September...but #1 on this 240D was the first valve I ever adjusted on this car (and it was hard to do, and hard to get the locking nuts tight.) Could I have screwed it up? The leakdown reading on #1 was 450...so methinks not valves...rings. How much compression can a bad valve adjustment lose?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1983 300TD needs restarting for full power

Very often the motor starts but has low power, won't even rev up much. If I shut it off (often it takes two tries) and restart it it has full power. I have changed the filters, hand pump, changed the fuel tank screen and hose but it wasn't dirty) and blown out the fuel lines. Nothing helped. The problem seems to occur more often after I have driven, stopped a while and try to restart it. The problem suddenly appeared more than a year ago but has not gotten better or worse. I have asked all the local mercedes mechanics but no solution.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1979 300D when to quit!

I have a 1979 300D with 300k+ miles. I had the intake and exhaust manifold off to install a new block heater. The intake ports were oil soaked, I know she's tired. I thought hey, I'll pull the head, do the valves and maybe throw some rings and bearings in while I'm in there... I stopped myself and thought I'd better see what this is going to cost. I can do the labor myself, so just need some parts. Well after putting together a parts list, I was looking at 2K plus machining if everything went well. SO HERE'S THE QUESTION, will I see more power in the old 300D after she has been overhauled?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

1984 300 TDT Fuse Blows - Eventually - Every Time

The fuse that controls the horns, ignition buzzer and backup lights on my 1984 300TDT Wagon always blows. Not immediately, but eventually. Cannot relate it to any action of mine. The backup lights were broken with loose connectors, rust and corrosion, so were replaced with new ones.

Should I check or disconnect the horns and see if that cures the problem? Any suggestion as to where to start?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

80 300td vs 83 300d(turbo)

Hello , I am writing to find out how much difference there is between a 1980 300td wagon vs a 1983 300d sedan when it comes to pick up. I intend to use traditional diesel and am looking for a daily driver in the ny 5 boro area much of which will be highway driving with short on ramps. I have leads on a beautiful 80 wagon but am concerned that its not a turbo and have heard they are sluggish, i guess i am looking for a definition of sluggish.Thanks in advance from a relative newbie-T

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

81 300d Cold Air on Highway

Interesting problem. I have a 81 300 d non turbo. Heat works fine when driving around town in a city type speeds. Temp stays right around 80 degrees Celsius. When I get on the expressway, at roughly 55 mph it cools off after about a minute. Temp gauge still reads 80ish. I added some cardboard behind the grill still with no improvement. I'm currently running diesel in it even though I have a Lovecraft waste oil kit. Any help would be great. It's going down to negative numbers tonight here in MI so it should be a cold ride to work in the morning. Thanks in advance.

Brian

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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