'75 300D won't start cold - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 01-08-2011, 08:14 PM Thread Starter
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Date registered: Nov 2010
Vehicle: 1975 Mercedes-Benz 300D
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Question '75 300D won't start cold

Hey guys, so I changed the glow plugs with a buddy on my '75 300D and now it refuses to start after the engine has been sitting for a couple of hours (even when it's like 40ºF outside) until now I have been using a little bit of WD-40 to get her going, but want to know if i possibly need to tighten the plugs more (or something, even with the glow plugs not working she used to start down to 20º) or do something (other than a valve clearance adjustment, going to get a feeler gauge and do that soon) to help compression...

it's not a major inconvenience, but I've heard bad things about using WD-40 to cold-start an engine so any help would be super appreciated!
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post #2 of 2 (permalink) Old 01-08-2011, 08:34 PM
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Did you actually tested the glow plugs working?
You might have burn GP fuse. Even with couple of bad GP the engine would still start with some smoking.
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