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  #1  
Old 08-19-2014, 09:43 PM
79Mercy's Avatar
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Location: Florida
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om617 injection timing

I replaced my injection pump in my 300td and while ago because the previous owner adjusted the delivery valve incorrectly and it caused a rough idle. I checked the timing with a AB- timing light and both light were on at 18 degree ATDC. I installed the new pump and timed it to 15ATDC like the shop manual suggests.

Runs good but its not as fast as it used to be 50-70mph is very slow, i wonder if i should set it 18 ATDC again and see how it performs.
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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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  #2  
Old 08-20-2014, 04:30 PM
WVOPWRD!'s Avatar
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Drip Timing Threads

Spec for OM617's is 23º-25º BELOW TDC!!! Not ABOVE! If it's in fact set to above I can only imagine what's happening.

26º BTDC seems to be the sought after degree, this is a highly debated topic I'm finding, but at least that number seems consistent...
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  #3  
Old 08-20-2014, 09:13 PM
79Mercy's Avatar
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i set timing using the mercedes a-b light. and spec using that a-b light is 15 degrees ATDC. I wasnt sure if 18ATDC would be advanced or retarded.
__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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  #4  
Old 08-21-2014, 07:46 AM
KarTek's Avatar
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ATDC, the higher the number, the more retarded since it's later. BTDC is opposite.
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  #5  
Old 08-21-2014, 05:58 PM
79Mercy's Avatar
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Join Date: Mar 2008
Location: Florida
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so i should set timing at 13ATDC with my a-b light, that would equal about 26BTDC if i was doing the drip method, correct?
__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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  #6  
Old 09-01-2014, 11:35 AM
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Yes, that´s correct.

Gruß
Volker
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  #7  
Old 11-05-2014, 08:43 PM
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Join Date: Sep 2007
Location: Long Beach,CA
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Dr. Bert posted info on advancing the IP Timing.

I tried advacing the timing using the Drip Method and on the low end it did indeed seem to have a little more pep but for me it nailed at idle and that was with with rebuilt Injectors.

Note I pulled all My rebuilt Injectors (Monark Nozzles) at 28 K Miles and they were all great. They were still at 2000 psi or the ones that varied the Needle on the Gauge was touching either sied of the Black 2000 psi line on the Gauge.
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