Bubbles around glowplug

[82vdub]

I believe that the thought to remove these is to use something like a wood screw, which has big deep threads that threads into the hole in the washer. You are just holding the washer to the bolt by the surface of the outside of the threads - which will have near zero holding power. A wood screw (or similar) would have the inside shaft and sides of the threads pulling up on the stuck washer, which is what you want.

[Flynn]

It seems to screw in pretty tight to me. I have no idea where to get a woodscrew from. If this doesn't work I'll have to pull the head.

[82vdub]

Whether it's tight or not, it's only gripping the washer opening by the tips of the threads. There's no holding power at the tips of the threads, and the threads or washer end will quickly grind away. You want to thread something into the opening, and pull upwards on the threads to dislodge the washer. You have no material beyond the washer that the bolt can pull up with in your pic. Only the tips of the threads. A hardware store will have all sorts of screws and bolts. They are there.

[Fatmobile]

OK, first we have to stop calling that a heat shield.
If the copper piece you have pictured with the bolt is what it looks like.
That's more of a crush washer.
A wood screw would never work,.. that's thinner than the aluminum ridge the shield sits on.

I can see why you thought to try cutting it with a chizel.
A sharp chizel, with great care.

[Quantum-man]

This is all that should be down between the injector and the cylinder head.


Looking back at the original picture, this washer is down the hole even if your special extra washer is down there too!

Go to any farm supplies merchant, for a bolt that will suit. Get wood screw and not UNF

[Flynn]

I can see why, you were suggesting a woodscrew now But regardless of what is supposed to be in there, I've got to get what is in there out first. What's a UNF? I shall make an attempt today with what I've got and see how it goes.

[Quantum-man]

If your extra washer is on top of the proper heatshield, then the lower will pull out the upper.

If these wrong washers were actually wedged down the threads of the head, then take a cheap flat screwdriver; heat the tip up to red and bend the tip about 45 degrees, then gently tap the tip inbetween the 2 washers and separate them, then hook the copper one out...

UNF? Sorry I assumed you were American. This is where America produced their version of France's metric threads, by inventing metric sizes expressed in turns per inch. UNC UNF and UNEF, F being fine and EF being extra fine

[Flynn]

Right, finally got this washer out, but not without some damage to the injector seat:





The bolt was not useful in the end, but the oven cleaner and pick were. It is running a bit happier now but I don't know whether that is because I pulled the copper washer or because of all of the carbon I cleaned off the injector seat/injector.

I also torqued the injector down and then tried to pull the new copper washer, just to see if it would, but it's stuck like the last one. Must be a slightly warped injector port.

I also pulled the injector after letting the engine idle was a few minutes and it would appear there is blowby up until the copper washer. Last time it was getting up to the injector threads but the new washer is sealing well (I should hope so as well since it is now stuck like the last one!).

Picture of the blowby (you can see where it is wet):



I think this is because the primary fireseal washer needs replacing, perhaps that was it all along. That will be ironic if it is because it was very easy to remove everytime I pulled the injector. The copper washer may or may not be a red herring, I'll have to see when I can get some more fireseals.

As far as symptoms go, it still has a regular puff of smoke on idle, hard to start, still doesn't want to idle at low revs, but it goes MUCH better, the low down torque has come back and it picks up like it should. Also the engine note sounds nearly back to normal. When I get some new fireseals I am gonna renew all of them to be on the safe side. If theres still a puff of smoke after changing the fireseals then I guess one of the injectors might have a problem.

[TylerDurden]

Wrong injector.

What numbers on on that?

[TylerDurden]

Should look more like this, methinks...

[Quantum-man]

Flynn, is this engine actually VW, or something French?
If VW, who sold it to you with those injectors in, or did you inflict this punishment on your self?

[Quantum-man]

Update

[TylerDurden]

It's a Peugeot.