M5 pump again

Josh in MI · Sep 8, 2009

I went home for the weekend and did some more "diagnostic" work on the m5 diesel. I filled the tank with enough fuel to get a good supply to the pump. I grabbed a battery and tried to bleed it, nothing again.

I then checked that the fuel was getting to the pump. When I removed the timing cover, I found only one timing mark, with no corresponding mark. By this time it was late and the battery was dead. I was alone and couldn't turn the engine and watch the pump at the same time.

If only one timing mark is visible, does that mean the the pump shaft is probably sheared? I have a bad feeling here.

For those who wanted a way to contact me, well, I am too cheap to pay for long distance and everything is long distance here. You can email me though as I check it often.

Ill John · Sep 8, 2009

Josh, I can't help on the problem but if you give your phone # soem guys can call you, they don't charge for incomming calls do they? Also your email isn't open on this post. HTH, John

Alan K · Sep 8, 2009

Is this a Rosa Master pump or Bosch?

Josh in MI · Sep 9, 2009

It has the Roosa Master DBG pump. The serial number puts it at 1963 production. The top end of the engine is not original. I dont know if this helps.

I am away from home until December finishing school. I just use my wife's cell for now. You can email me at [email protected].

Thank You

Anonymous-0 · Sep 9, 2009

Josh, If both marks were not lined up it is probably because the engine was not set on #1 TDC (or whatever the timing spec is BTDC)Continue to roll the engine over until the correct timing mark is visible in the hole in the flywheel housing, then check and see if the other mark is visible. Does the ring move at all when barring the engine over? When the crank/flywheel is set on the correct timing mark, loosen the pump mount bolts and align the timing marks. It may be possible that the timing advance ring retainer has deteriorated and is not holding it in position. I had this on my G950 and it required a pump tear down. It would run, but would cut out and smoke like a freight train at any speed above 1200 rpm. Would idle fine. Email is open if there is any more questions!

Brian Jasper co. Ia · Sep 13, 2009

Josh, do you have a shop vac or leaf blower? I used the blowing side of my big shop vac to pressurize the fuel tank slightly to prime the fuel system on a D17 Allis. All I did was have the supply line to the pump loose. When fuel came through I tightened the line. It also has a Roosa pump on it. The D17 had been run out of fuel when I got it. I put new filters in and as soon as it got fuel to the pump it fired up.

M5 pump again

Josh in MI

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Ill John

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Alan K

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Josh in MI

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Anonymous-0

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Brian Jasper co. Ia

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