PeachParts Mercedes-Benz Forum - View Single Post

whunter · #4 09-06-2012, 02:33 AM

Quote:

Originally Posted by Colorado220

Car: 1971 220 Diesel
Issues: Hard start only when parked overnight. Rest of the time is fine.
What I have done: Filters, valve adjust.
Need to do: Compression check but need the tools (anyone near Denver willing to help..Please!!!)

Noticed: The hard plastic line that goes from block diaphragm to master cylinder has a black color inside. Is there another way to test if diaphragm is the culprit?

Currently the subframe bushings need replaced and the rear shocks are gone. But when I come to a stop, esp. in the morning, it shakes pretty darn good.

Thanks for any help/tips

I suspect your compression is good.
The issue is intermittent, primarily at cold start = this leads me to suspect a glow plug issue and/or slow/weak starter.

* At an ambient temperature of 52° F....

* If the glow plugs are perfect; They should be on for thirty seconds, before you try to start.

* If the glow plugs are marginal you may need to cycle them several times.
* If the glow plug circuit is having an intermittent failure (corrosion - wear - age) you will have serious difficulty cold starting regardless of other factors.

It is also possible there is a small air leak in the fuel supply line, leaking down and exacerbating the cold start issue.

In Denver, you can reduce the cold start issue a bit by adding a gallon of kerosene to the fuel tank.

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