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+--- Thread: OM617 Blind timing advance (/showthread.php?tid=5985)
OM617 Blind timing advance - Evenglass - 11-09-2014
So my 617 has always been on the quiet side even with straight exhaust it really doesn't have that diesel sound. So while maintenance some stuff I noticed that the hash marks on the Injection pump don't line up. It appears the pump is set timing retarded.
![[Image: 1609619_397517377080462_1708773673255250...576944.jpg]](http://s508.photobucket.com/user/evenglass1/media/1609619_397517377080462_1708773673255250396_n_zpse5576944.jpg.html)
Before
I adjusted to line up marks.
![[Image: 10409028_397517363747130_316162586176121...3b9acd.jpg]](http://s508.photobucket.com/user/evenglass1/media/10409028_397517363747130_3161625861761213634_n_zpsb43b9acd.jpg.html)
After
Was this a bad idea to do blindly without drip timing? Why didn't the marks line up before? Should I try to run this? thoughts? And for the life of me I can't get the bolt back on at the back of the pump, any harm in leaving it off?
Valves adjusted 5500 miles ago. Chain stretch within spec at 3*
RE: OM617 Blind timing advance - Volker407 - 11-09-2014
(11-09-2014, 02:39 PM)Evenglass So my 617 has always been on the quiet side even with straight exhaust it really doesn't have that diesel sound. So while maintenance some stuff I noticed that the hash marks on the Injection pump don't line up. It appears the pump is set timing retarded.
Was this a bad idea to do blindly without drip timing? Why didn't the marks line up before? Should I try to run this? thoughts? And for the life of me I can't get the bolt back on at the back of the pump, any harm in leaving it off?
Valves adjusted 5500 miles ago. Chain stretch within spec at 3*
No problem running the pump in that position. But it is a problem if the bolt is missing, you should put all bolts in.
Adjust valves again after that mileage.
You can even turn the pump more early, so that the pump marker is 1 mm above the engine block marker.
Gruß
Volker
RE: OM617 Blind timing advance - Keino - 11-10-2014
If you mean the bolt back of the pump (not the 3 in front) you can skip that one. been driving xxxxx km's without it. No probs
RE: OM617 Blind timing advance - Simpler=Better - 11-10-2014
(11-09-2014, 06:03 PM)Volker407(11-09-2014, 02:39 PM)Evenglass So my 617 has always been on the quiet side even with straight exhaust it really doesn't have that diesel sound. So while maintenance some stuff I noticed that the hash marks on the Injection pump don't line up. It appears the pump is set timing retarded.
Was this a bad idea to do blindly without drip timing? Why didn't the marks line up before? Should I try to run this? thoughts? And for the life of me I can't get the bolt back on at the back of the pump, any harm in leaving it off?
Valves adjusted 5500 miles ago. Chain stretch within spec at 3*
No problem running the pump in that position. But it is a problem if the bolt is missing, you should put all bolts in.
Adjust valves again after that mileage.
You can even turn the pump more early, so that the pump marker is 1 mm above the engine block marker.
Gruß
Volker
I agree on all counts. If you advance it too far, it will knock. So, you can adjust until it starts knocking, then retard a little bit. That will put you pretty darn close to perfect timing.
From what I've seen on my old 617, you can advance beyond the factory recommended timing by a few degrees and get a little more torque.
RE: OM617 Blind timing advance - Evenglass - 11-10-2014
(11-10-2014, 08:37 AM)Keino If you mean the bolt back of the pump (not the 3 in front) you can skip that one. been driving xxxxx km's without it. No probs
That's the one! I did manage to get it back in.
(11-10-2014, 08:48 AM)Simpler=BetterSo it's not mandatory to drip time? I can adjust by sound a little at a time until it starts to knock then turn it back a bit? I like option 2(11-09-2014, 06:03 PM)Volker407(11-09-2014, 02:39 PM)Evenglass So my 617 has always been on the quiet side even with straight exhaust it really doesn't have that diesel sound. So while maintenance some stuff I noticed that the hash marks on the Injection pump don't line up. It appears the pump is set timing retarded.
Was this a bad idea to do blindly without drip timing? Why didn't the marks line up before? Should I try to run this? thoughts? And for the life of me I can't get the bolt back on at the back of the pump, any harm in leaving it off?
Valves adjusted 5500 miles ago. Chain stretch within spec at 3*
No problem running the pump in that position. But it is a problem if the bolt is missing, you should put all bolts in.
Adjust valves again after that mileage.
You can even turn the pump more early, so that the pump marker is 1 mm above the engine block marker.
Gruß
Volker
I agree on all counts. If you advance it too far, it will knock. So, you can adjust until it starts knocking, then retard a little bit. That will put you pretty darn close to perfect timing.
From what I've seen on my old 617, you can advance beyond the factory recommended timing by a few degrees and get a little more torque.
RE: OM617 Blind timing advance - Simpler=Better - 11-10-2014
The drip lets you get a concrete number but it isn't necessary if you don't mind playing with a bit.
RE: OM617 Blind timing advance - MFSuper90 - 11-10-2014
I've never drip times anything in my life. I just use my ears and how it runs and starts
RE: OM617 Blind timing advance - Evenglass - 11-12-2014
Thank you for the responses everyone.