No wonder I've had lumpy starting

[nigelb]

I presume it would be a bad idea to fill the cylinder with oil/water, then refit the injector, hydraulically locking it, then trying to push the glow plug tip out by turning the engine by hand?

Might break something I suppose, or pop the head gasket.  Just throwing the thought out there!

The only issue with that Tony is when turning the engine by hand the valves will start to open thereby losing any compression. I suppose by determining the compression stroke would help.

[william crosby]

a diesel engine will give a compression test of about 350 psi thats why never use petrol tester on a diesel

[Bio Dervotee]

Compression ratio is about 20 to 1, so about 20bar/300psi,  detonation pressure will be in hundreds/thousands of bars

[Glycer-rides]

This thread shows a cross sectional view of the problem area.
http://forums.vwvortex.com/showthread.php?5478522-20v-ALH-running-diesel.

Have you kept any of the other plugs, Nige? If so, cut a tip off and see what diameter of (long) easi-out you would need to tap in...or just use a tap, as thread isn't the issue. I would then let the stuck tip soak in PB Blaster or similar for a couple of days, then 'tap' the connection into the tip so as to attach something that will work like a slide hammer.

The compressed air might work as well if yoy can get that kit.

[Rotary-Motion]

This thread shows a cross sectional view of the problem area.
http://forums.vwvortex.com/showthread.php?5478522-20v-ALH-running-diesel.

Have you kept any of the other plugs, Nige? If so, cut a tip off and see what diameter of (long) easi-out you would need to tap in...or just use a tap, as thread isn't the issue. I would then let the stuck tip soak in PB Blaster or similar for a couple of days, then 'tap' the connection into the tip so as to attach something that will work like a slide hammer.

The compressed air might work as well if yoy can get that kit.

threaded part came out easy the hot tip end came off and fell in chamber

[Glycer-rides]

I know!
As I read it, the tip was assumed to be stuck in normal position, not fallen in to the chamber. The advice was on how to get the tip out.

[Rotary-Motion]

I know!
As I read it, the tip was assumed to be stuck in normal position, not fallen in to the chamber. The advice was on how to get the tip out.

i beg ya pudding, i read wrong i thought it fell off, ok so its stuck in situe, yeah may be bad that one...

thought they looked same as these though

[nigelb]

My biggest fear of tapping into the broken tip would be if the tip then fell into the combustion chamber. I know that the worst case scenario is removing the head but if possible it would be great to remove the tip without resorting to such measures.

I wonder if araldite would work. You know...try glueing the two parts together and attempting extraction. Do you think that would work. I've still got the broken plug so it is feasable

[Rotary-Motion]

My biggest fear of tapping into the broken tip would be if the tip then fell into the combustion chamber. I know that the worst case scenario is removing the head but if possible it would be great to remove the tip without resorting to such measures.

I wonder if araldite would work. You know...try glueing the two parts together and attempting extraction. Do you think that would work. I've still got the broken plug so it is feasable

what part/position at did it snap off on glow plug?

[K.H]

What about araldite on the end of a steel rod so you can tap it to try and release it?

[nigelb]

My biggest fear of tapping into the broken tip would be if the tip then fell into the combustion chamber. I know that the worst case scenario is removing the head but if possible it would be great to remove the tip without resorting to such measures.

I wonder if araldite would work. You know...try glueing the two parts together and attempting extraction. Do you think that would work. I've still got the broken plug so it is feasable

what part/position at did it snap off on glow plug?

It snapped off just below the champhered seat where the plug seals into the head. The black tip is still there and will not move under normal engine compression. I've ran the engine til normal operating temperature was acheived and it showed no sign of moving

[Rotary-Motion]

My biggest fear of tapping into the broken tip would be if the tip then fell into the combustion chamber. I know that the worst case scenario is removing the head but if possible it would be great to remove the tip without resorting to such measures.

I wonder if araldite would work. You know...try glueing the two parts together and attempting extraction. Do you think that would work. I've still got the broken plug so it is feasable

what part/position at did it snap off on glow plug?

It snapped off just below the champhered seat where the plug seals into the head. The black tip is still there and will not move under normal engine compression. I've ran the engine til normal operating temperature was acheived and it showed no sign of moving

so to clarify if under normal circumstances there would be a gap bettween probe body and cylindrical chamber its in the center of?

and now its held in by carbon deposits.

all the main steel body came out ok though?

[Glycer-rides]

Worth a go... but I'd doubt the tensile capabilities of the bond; that bugger is near-welded in with carbon.
Beru glow plugs shear off at around 90 Nm, arounf twice the install torque figure.

[K.H]

Is there anything that will dissolve carbon? an oven type cleaner maybe, pour some in the hole, leave, then run the engine?

[nigelb]

Is there anything that will dissolve carbon? an oven type cleaner maybe, pour some in the hole, leave, then run the engine?

If the carbon dissolves with the engine running there is the likelyhood of the tip falling in the combustion chamber and stuffing the engine