Checking an '81 300cd - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 02-11-2012, 01:05 PM Thread Starter
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Date registered: Apr 2009
Vehicle: 1972 Mercedes Benz 280SE 4.5
Location: Seattle
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Checking an '81 300cd

Hiya folks, it's been awhile - I've since sold my '72 280 SE 4.5 and am in the market for a slightly newer diesel. I found an '81 300cd and I love it (drives great and looks great). I want to test the engine out and my mechanic friend mentioned I should pull off a blowby tube on the engine, cover it with a rag and count to six. If the car makes it to six, buy it - otherwise, walk away. Can anyone give me a little background on a) what exactly this tests on the engine, and b) precisely what tube to remove from the engine? I'd like to get the car to my mechanic before purchasing, but not sure that will work out logistically.

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