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#1
07-02-2014, 09:22 PM
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No engine Compression?
Hello,
What would cause an engine to have virtually no compression; 1980 300SD, car can do a maximum of 10mph, head gasket has been replaced. Thank you! Alex Edit: TO all those who have replied, I thank you for the input, turned out to be a broken part: follow this thread for more info: Parts Identification
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Nosce Te Ipsum "Know thyself" Last edited by Assault; 07-14-2014 at 10:32 PM. 
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#2
07-02-2014, 09:30 PM
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Undertightened head? Screwed-up valves?
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco...  " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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#3
07-02-2014, 10:06 PM
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Quote:
I'd be looking at throttle linkage first.
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Current Stable
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#4
07-02-2014, 11:19 PM
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Are the valves waaaaay too tight?
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.
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#5
07-03-2014, 01:20 AM
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If the head was removed and it had reasonable power before (did it?) check:
1. Valve timing, 2. Valve clearance, 3. Injection pump timing, 4. Air intake restrictions (e.g., a rag getting sucked in the air cleaner), 5. Linkages e.g., when depressing the accelerator does the linkage at the pump move accordingly, and 5. Vacuum hoses. Good luck!
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#6
07-03-2014, 08:29 AM
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Yeah, "no compression" would mean its sitting quietly and not running.
 If it runs (does it idle normally?) but is slow, I would suspect throttle linkage adjustments, fuel restrictions....etc Does it rev freely if you move the linkage under the hood?
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#7
07-03-2014, 03:50 PM
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If the problem is only since the head job the most likely candidate is the injection pump is out of the proper phase. With both intake and exhaust cam lobes on the first cylinder pointing generally upward. The damper mark where it should be.
The number one fuel element of the injection pump should drip test properly. They can run poorly with the pump way off and usually harder to start as well mind the poor performance. If that is not the issue. Maybe someone left a rag in the system for example when putting it back together.
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#9
07-03-2014, 11:42 PM
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Quote:
Help us help you by posting your compression numbers.
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Current Stable
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