Replacing thermostat in a '73 280 - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 11-22-2006, 11:15 PM Thread Starter
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Replacing thermostat in a '73 280

Newb question alert.

Did search the forum first, can't find anything specifically addressing this one. Can someone give me a quick rundown on the procedure for swapping a thermostat on the m110 engine? It's the most inaccessible thermostat I've ever seen in my life. The only way I can possibly see changing it would be to remove the radiator to make enough room to get at those bolts...is that right???

Thanks in advance...my w201 8v, w201 2.6, and my w123 have all been a breeze to work on to this point. This thing is really shoe-horned in there...
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post #2 of 6 (permalink) Old 11-23-2006, 07:59 AM
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Originally Posted by Cephallus
Newb question alert.

Did search the forum first, can't find anything specifically addressing this one. Can someone give me a quick rundown on the procedure for swapping a thermostat on the m110 engine? It's the most inaccessible thermostat I've ever seen in my life. The only way I can possibly see changing it would be to remove the radiator to make enough room to get at those bolts...is that right???
I would just remove the fan and the fan clutch, that would give you enough room.

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post #3 of 6 (permalink) Old 11-23-2006, 08:57 AM
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You got that right. They shoe-horned it in there. In my opinion that was one of MBs poorest designs. They stuffed that twin bump stick into that W114 chassis and topped the whole thing off with that crappy Solex which is a poor copy of a real Quadro-jet. When they finally switched to K-jetronics and put in the W116, it was a sweet little engine. IIRC the book gives you about 8 hours to do water hoses, and you need every minute of the time. Don't make the mistake I did one time and skip the little hose that feeds the choke, because I was too lazy to pull the carb. Guess which hose sprung a leak shortly after? Good luck.
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post #4 of 6 (permalink) Old 11-23-2006, 09:33 AM
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Originally Posted by autozen
You got that right. They shoe-horned it in there. In my opinion that was one of MBs poorest designs. They stuffed that twin bump stick into that W114 chassis and topped the whole thing off with that crappy Solex which is a poor copy of a real Quadro-jet. When they finally switched to K-jetronics and put in the W116, it was a sweet little engine. IIRC the book gives you about 8 hours to do water hoses, and you need every minute of the time. Don't make the mistake I did one time and skip the little hose that feeds the choke, because I was too lazy to pull the carb. Guess which hose sprung a leak shortly after? Good luck.
Speaking of hoses, autozen, any "cheating" way to get at the hose that's behind the A/C compressor on the M110? I don't feel like yanking the compressor off. You know the one I mean, the call it "tube-to engine" or something.

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post #5 of 6 (permalink) Old 11-23-2006, 09:53 AM Thread Starter
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Thanks, guys. I got a good response over at mercedesshop forums as well on some of the gotchas. I really just wanted to change the tstat to rule out anything major before I start the restoration. I'll be pulling the engine in a couple of weeks anyway, so I should have plenty of room to work then...
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post #6 of 6 (permalink) Old 11-24-2006, 03:54 PM
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Originally Posted by flyboyike
Speaking of hoses, autozen, any "cheating" way to get at the hose that's behind the A/C compressor on the M110? I don't feel like yanking the compressor off. You know the one I mean, the call it "tube-to engine" or something.
Ypo're tasking my feeble memory. That should be a York compressor, and I can't remember any tricks. Be glad you don't have to pull a comprssor on an early OM615 or OM616. That bracket wraps around the whole front of the engine. The trick to that one is to snip the bottom section of the bracket with a smoke wrench. Makes all the jobs easier after that.
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