OM 606 Drilled too deep trying to extract a stuck Glow Plug - PeachParts Mercedes-Benz Forum

funola · #1 04-24-2016, 02:01 PM

1/2" drive socket on the crankshaft pulley nut (not sure size on 606) and a ratchet. If you can't turn the engine a few revolutions, coolant has gotten into the other cylinders via the intake runner and is hydro locked. You'll have to remove the other glow plugs or injectors to blow it out.

ROLLGUY · #2 04-24-2016, 03:36 PM

Quote:

Originally Posted by funola

1/2" drive socket on the crankshaft pulley nut (not sure size on 606) and a ratchet.

If I remember correctly, this is impossible on an E300. On a 123/126 with a 616/617, it works great (27mm socket), and is the best way.

funola · #3 04-24-2016, 03:47 PM

Quote:

Originally Posted by ROLLGUY

If I remember correctly, this is impossible on an E300. On a 123/126 with a 616/617, it works great (27mm socket), and is the best way.

Is there an alternative? How do you set TDC doing IP timing? Power steering nut?

ROLLGUY · #4 04-24-2016, 05:49 PM

Quote:

Originally Posted by funola

Is there an alternative? How do you set TDC doing IP timing? Power steering nut?

I am sure there is a way, but it is not with the power steering nut either (there is none).

mikemass1221 · #5 04-24-2016, 04:56 PM

Quote:

Originally Posted by funola

1/2" drive socket on the crankshaft pulley nut (not sure size on 606) and a ratchet. If you can't turn the engine a few revolutions, coolant has gotten into the other cylinders via the intake runner and is hydro locked. You'll have to remove the other glow plugs or injectors to blow it out.

There is no room to get in there as is. I need to start disassembling a lot in the front to get a hold of that pulley. How necessary is this step? If I can get to it, clockwise or CCW?

I was ready to buy all the plugs, bolts, Loctite, JB Weld, etc that I need and button this thing up already.

I haven't removed any injectors. Was hoping I wouldn't have to, but none of the other Glow Plugs are in yet. Once I broke off the one, I never bothered installing the new ones yet. If there's a way to just 'blow it out' why don't I just do that in case there is coolant in the pistons as opposed to turning the engine by hand? Is that a possibility?

funola · #6 04-24-2016, 09:22 PM

Quote:

Originally Posted by mikemass1221

There is no room to get in there as is. I need to start disassembling a lot in the front to get a hold of that pulley. How necessary is this step? If I can get to it, clockwise or CCW?

I was ready to buy all the plugs, bolts, Loctite, JB Weld, etc that I need and button this thing up already.

I haven't removed any injectors. Was hoping I wouldn't have to, but none of the other Glow Plugs are in yet. Once I broke off the one, I never bothered installing the new ones yet. If there's a way to just 'blow it out' why don't I just do that in case there is coolant in the pistons as opposed to turning the engine by hand? Is that a possibility?

The idea of turning the engine over a few turns, slowly, by hand, is to push out the coolant which may be in the cylinders, without possibly harming the engine. If you use the starter motor to do the initial push out of the coolant, it may hydro lock and cause some damage. If the other 5 glow plugs are out currently, you do not need to remove the injectors. The coolant will be pushed out of the 5 empty glow plug holes and the 13/64 hole. After you turned the engine over a few turns by hand, most of the coolant will be out and it cannot hydro lock anymore and you can then spin it with the starter motor and blow the rest of the coolant out of the glow plug holes.

At 5:00 min mark in this video https://www.youtube.com/watch?v=2DHD6UoALto Dieselmeken turns the 606 engine with a socket. His engine is out of the car though. Maybe others will have alternative ideas.

Edit: With gloves on, try to grab the power steering pulley and another pulley and see if you can turn the engine. With glow plugs out and not fighting compression, it may be possible.