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  #1  
Old 03-25-2003, 08:17 PM
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What may be wrong if a 1981 Mercedes 240D can only start when doing a push start?

Dear friends,

What may be wrong if a 1981 Mercedes 240D can only start when doing a push start? Starting using the ignition key only turns the engine but would not be able to successfully start.

It takes about 30 ft to start the car when doing a push start. The car runs well after starting.

Compression leak, valve clearance ??? Where can I buy a compression tester for diesel engines?

Thank you very much for your precious help.

Best regards,

Eric
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  #2  
Old 03-25-2003, 08:20 PM
123c
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You probally need a new starter, make sure to get the updated model if you do end up needing one.
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Old 03-26-2003, 06:31 AM
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Eric,
In order: fresh big battery, clean cable contacts (including the ground strap), new fuel filters, clean air filter, valve clearance (also check timing chain stretch), primed and leak-free fuel delivery system. Dumb question on my part: are you glowing the engine?
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daBenz - 1970 220D
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Old 03-26-2003, 08:18 AM
nipeex
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Glowing?

Maybe youre glowing ins't work okey. Take a voltagemeter and glow. There should be about 3 volt or more on them. (i don't know how many volts there are on W123 but shore as hell there is something...)

try to buy 4 new "glowplugs" They are not so expensive and a good investment a cold day.
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Old 03-26-2003, 10:19 AM
123c
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Quote:
Originally posted by dabenz
Eric,
In order: fresh big battery, clean cable contacts (including the ground strap), new fuel filters, clean air filter, valve clearance (also check timing chain stretch), primed and leak-free fuel delivery system. Dumb question on my part: are you glowing the engine?
Yes, check these things too, as well as the glow plugs. While you are at it, you should try and pull the starter and have it tested. I went through replaceing many things on my car, and still wondered why it was having a hard time starting, and it turns out that I had a bad starter.
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  #6  
Old 03-26-2003, 10:40 AM
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Eric,

Do you heat the glow plugs when you push start the car?

Seems like the only difference in a Diesel compression gage would have a scale that goes to 350 PSI.

P E H
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