Thread: 200 TDI head problem

Different heads with different bolt holes.


Tom.

Don't even think about relying on an internet diagnosis (wrong head haha, the lower picture has been cropped) take the heads straight to a specialist who will hardness check the surface and see if they are worth anything.

I will take one into town tomorrow and see what the verdict is.
We have two engine rebuilders in town and the are right next to each other
I thought I might give one head to one and the other to next door but a bit reluctant to let each know what I am doing

based only on the pictures I wouldnt trust either of those heads due to the pitting between 2+3 for the head on the top and what appears to be the pitting where the combustion fronts been eroding near the exhaust valves on #1

the lower head appears to have been walking its fire rings by the fretting where the ring seal marks are.

depending on where you are in QLD I would take them both to MR automotive and get them to do the basic checks on the heads for you

Thanks Dave.
The leak was between the coolant port and inlet valve in the bottom left.
That part of the head looks strange as there is a circular cut around the edge of the combustion chamber as if its an insert. but it is not all the way around so cant be.
Thats the lower head in the first picture. The other spare looked better I thought.

Originally Posted by 123rover50

Thanks Dave.
The leak was between the coolant port and inlet valve in the bottom left.
That part of the head looks strange as there is a circular cut around the edge of the combustion chamber as if its an insert. but it is not all the way around so cant be.
Thats the lower head in the first picture. The other spare looked better I thought.

That looks like a pre-ignition type burn, the combustion gasses seem to be melting part of the head, similar to petrol engine burning a hole in a piston the original pic of the 2 heads shows multiple marks.
I have seen injector nozzle pattern marks before, usually in the combustion on top of the piston.
I would find an Expert diesel mechanic/shop and get them to interpret what those marks are caused by.
BTW have those 2 heads ever been on your engine, as the burn pattern is almost identical, what sort of Fuel are you using, Regards Frank.

Originally Posted by 123rover50

Thanks Dave.
The leak was between the coolant port and inlet valve in the bottom left.
That part of the head looks strange as there is a circular cut around the edge of the combustion chamber as if its an insert. but it is not all the way around so cant be.
Thats the lower head in the first picture. The other spare looked better I thought.

that might have been cause by improper torquing of the head with one sides bolts done up properly and the other side missed letting the head "wedge over"

Hi,

I have had similar looking suspect heads a few times (300Tdi rather than 200Tdi) I just pull the valves out and take them down to the local head place, and request inspection, hardness test and skim as required.
In all cases (~10) bar one, the result has been instant, to effect that the scrappy can convert them to beer coupons. On the exception, the chap gave it a stern diode of looking at, pronounced it fit for service with no work required.

They have never charged me, and they are worth about a schooner at the scrappy if stripped....

Cheers, Gumnut