W123, Diesel Engine Repair

83 300CD AC Vent Issues

MY 1983 Mercedes 300CD TurboDiesel AC produces no air flow at the vent. I have rebuilt the motor, new brushes and it works beautifully. I tried reversing the wiring at the plug under the dash and that produced less pressure. I measured the flow by taking the motor fan out of its housing and turning in on and it is still fine and produces a good
fan noise when in the housing.
Next I checked all the vents and only the center vent needed a connection. Now they all work and work correctly according to the the CC control sequence. All tested well.
Still no flow at the vent only a whisper of air.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

1984 300 turbo WVO 2 tank conversion

I am converting a 1984 300 turbo to run on wvo using a seperate tank, hose in hose approach. We converted my brother's 1986 sdl already (so we have a clue). I just (15 minutes ago) bought the SVO/WVO advanced theory so it has not arrived.

MY QUESTION: Where do I cut the heater hose? right after the thermostat? on the top left hand side of engine (as I face the engine)? I am guessing that if I cut there then any flow controls for heat need not be on in order to supply heat for 2nd tank (good idea when its hot outside).

Thanks

Chassis Model Number

W123

Forums

SVO Fuel Conversion Specific Aid

84 280E 123 Correct radiator coolant

What sort of radiator coolant should I put in my '84 280E (W123)? I've recently acquired this car, and the previous owner reckons he had the system flushed and the coolant replaced not long before selling (but he did not keep the receipt for the work). The system certainly seems full of clean, bright green fluid but I have no idea what brand/type of coolant it is. Should I be looking to flush this coolant out of the system and replace it with coolant supplied by a Mercedes Benz dealer? Thanks in advance.

Brad

Chassis Model Number

W123

Forums

Gas Engine Specific Aid

79 W123 300D-Rear clunking/vibration ??

For about a year I've noticed a clunking noise/vibration in the right rear at sustained highway speeds after about 45 min. Almost sounds as if I dropped my muffler and the pipe is banging and dragging , and there's a noticeable squeeking or high pitched rubbing sound as well. New Tires and shocks, new brakes & pads ,new muffler, all donuts OK . Noticed a worn center drive shaft carrier and one cracked CV boot. Flex joints checked out OK.

Noise doesn't happen in normal driving around town. 2 mechanics have thus far been unable to diagnose.

Have any ideas?

Chassis Model Number

W123

Forums

Transmission / Suspension Specific Aid

1982 300TD Fully caharged battery dies after a few cranks

I have a 1982 123, 300TD and noticed the good battery dies quickly after just a few cranks of the engine. I tested each glow plug terminal with a light as shown on the cool videos you have, and noticed that two of the five do not light up. I looked at the glow plug relay fuse and it is OK, could I possibly have a short in those two glow plugs that would cause it to kill the battery that fast? Please help :(

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

'83 300TD Footrest removal

I'm having difficult removing cracked footrest. Footrest is connected to plastic kickplate with 2 plastic rivets. Kickplate seems attached to car body with a clip on the inside. I cannot remove kickplate no matter which way I pull it. Also, do I destructively remove the 2 plastic rivets holding the footrest? Do you sell new rivets? Thanks for your help.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

1983 300D Turbo Boost Improvement Next Steps

At ca. 154,000 miles I have been slowly bringing the engine performance back to snuff. I recently rebuilt my turbo using your excellent kit. The compressor and turbine blades and shaft were in excellent condition so I opted not to purchase the replacement set.

Prior to the rebuild my boost pressure at 4000 rpm was 9 psi. Following the rebuild, there was no improvement in boost pressure. Per your instructions, I tested the waste gate (with a bicycle pump) and it appears to work.

The ALDA tube and Banjo bolt are clean; I've installed a new air filter, adjusted the valves following your instructions, installed rebuilt Monarch fuel injectors, and did a diesel engine purge (which was clean) and replaced the fuel filters.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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