Questions and Answers

240D overheating

My 1977 240D with 260,000 miles, which ran wonderfully up to the point where I decided that I need get the green stuff out, now has overheating issues. I replaced old coolant with the Zerex GO-5 per numerous reference on this forum and other sources. While changing over I also back flush the cooling to confirm that all of the old coolant was completely removed. After purged the system of air through the bleed screw in the top of the thermostat housing and running the heater, I thought I was back on the road as good as ever.

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"Core Support" location on W126

I bought an FM10 water separator filter for my 1982 300SD, and in the instructions it suggests that I mount it to the left front "core support" bracket. After surveying for a spell, I was unable to locate this bracket in the engine compartment. Can anyone point me, via other reference points, to this bracket? Thanks in advance, tbird

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Exhaust Leak From Manifold Or Turbo on a 300SD

I noticed a bit of soot in the instrument panel of my '84 300SD. I also get a few specks of soot on the grille and under the hood. My guess is that I have a minor leak somewhere on the exhaust side of the engine. Is there anywhere that seems prone to leakage? Exhaust manifold gasket, turbo gasket, etc.? Thanks for any advice you can provide. Tim Delaney Stewiacke, NS, Canada 1984 300SD, 225,000km

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Flex Plate location?

I recently bought an 81 300td that has a 118 transmission. When driving, there is a bad flare between 1st and second and the car "clunks" like I am dragging a can of paint under the shifter. I read (/node/49) the flex plate torque converter page and thought that may be my problem. But I can't figure out where the blasted thing is so I can check it...and if it needs replaced or needs new bolts, Kent, do you have those handy? I did just finish changing the transmission fluids and filter, oil and filter, and the inline fuel filter.

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6.9 transmission pump

the transmission in my 6.9 has become all neutral. no engagement in any gear. this happened just after i started the car in the morning. i backed up about 3 feet, and that was it. prior to this, it worked perfectly, with no noises or malfunction of any kind. when i checked the fluid level it was very high. can anybody tell me anything? it was suggested that i check the auxiliary trans pump located below the ac compressor? help!

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Diesel blow by, high oil consumption, why?

I recently purchased some of your manuals and was checking out my newly purchased 82 300td and noticed it has excessive blow by and was 3 quarts low on oil after roughly 1000mi! I did your plug the breather trick and it goes for 3-4seconds before shutting down. This car starts great on frosty mornings and has lots of power, no smoke and no oil spots on the driveway. What do you think is the best method for freeing up sticky rings? (if that's my problem) I have a friend who fills his crankcase with biodiesel after draining the oil and idles for 10min or so. Do you think this is a bad idea?

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123 Chassis Water temp sender

1985 MB 300D 123 Chassis Diesel. Dead Water temp guage looking for water temp sender ? I see three place for Senders for water temp guage #1 on the Engine block (drivers side) #2 on Water housing (passenger side) #3 On water housing (on front of engine) 1) Which sender feeds the instrument temp guage? 2) Can I check to see if the problem is guage or sender by grounding the wire goiing to the sender ? (will the needle on the guage move?)

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1983 300SD touchy wiper switch issue

Wiper/Indicator Stalk Issue My 1983 300SD thinks that it has automatic wipers! Some instances when I use my turn signal, the wipers intermittently wipe the windshield and will continue to do so until I jiggle the switch or use the turn signal again. It's really quite frustrating and has started to noticeably scratch my windshield!

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