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Old 09-11-2001, 09:50 PM
Coming back from burnout
Join Date: Jun 1999
Location: in the Pacific Northwest
Posts: 2,274
85 300D won't start afterr rebuild--injection timing--180 degrees off ?

My 85 5 cylinder 300D is finished post engine overhaul, new head, timing chain. I put the pump back in and timed it, but the car won't start. Last time I rebuilt my 240D the engine turned over on first start.
On my 85 5 cylinder injection pump--I shoved it back in with notches matched and 24 ATDC--but I didn't check for Rabbit Years on the Cam, both lobes up. Since Crank turns 2x for Cam 1x, is it possible I am 180 degrees off? Do I have to remove pump and reset it? I sthis possible? respectfully RC
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Old 09-11-2001, 11:32 PM
Registered User
Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Yes, it is possible for the pump to be 180 out -- you have to line up the notch on the pump shaft to the opposite corner on some pumps. You may also have set the injection pump on the exhaust stroke, too -- check injection timing and look at the cam lobes. I'll never start if you inject 180 out. It should puff white smoke, though.

Did you set the timing with the drip tube? If not, you need to.

Of couse, this is MUCH easier on the engine stand before you put the motor back in........

It may take a while to get the engine started, too. If you don't have white smoke coming out of the tailpipe, I wouldn't rule out needing to crank longer.

Did you bleed the pump competely? Do you have good fuel delivery from the feed pump? I ask, because it took three battery charges and two batteries to get my brother's 300D started after rebuilding the motor.

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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Old 09-12-2001, 12:27 AM
Senior Member
Join Date: Apr 2001
Location: Beech Island, S.C.
Posts: 468
It may be true that it's 180 degrees off. You can retime the camshaft if you're careful. First position the crankshaft at 45 degrees before TDC and remove the chain tentioner and the cam sprocket. Rotate the cam 180 degrees to 45 degrees before TDC and then replace the chain and tentioner. Turn the crank to TDC and check the cam timing.
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Old 09-12-2001, 08:25 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
I would bring the engine to TDC, remove the rocker arms (5 bolts), turn the cam 180, reassemble, and try it out. There is no way to tell where the pump is unless you can see through the lock up hole.

I would just turn it and try.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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