Deck height, What went wrong? Options

[DavidSweden]

I am rebuilding my 2.0 engine

This evening I installed #4 cylinder & piston (with new rings). I then tightened the cylinder down onto the case to measure the deck height.
The deck height came to 0.2mm which is 0.008". as I understand it the deck height should be about 1mm (0.04").
I have installed new crank bearings, the piston and cylinder are original, the shim under the cylinder is the same thickness as the original shim.

The deck height should be the same as before the rebuild shouldn't it? Anyhow the deck height seem very small.

Advice appreciated

[ThePaintedMan]

Cylinders in the same order? As said before, was the case machined? There are lots of variables.

[DavidSweden]

Cylinders in the same order? As said before, was the case machined? There are lots of variables.

Thanks for all the replys.

The case has not been machined, I have installed new rod bearings and crank bearings. I am holding down the cylinder with 2 steel plate on each side, similar to the pic Stugrays posted. I am using a feeler gauge to measure the deck height and a dial to get to top dead.

I will post some pics of the arrangement within the next few days.

Is there a minimum deck height to avoid the piston hitting the valves?

Thanks again

[tornik550]

Cylinders in the same order? As said before, was the case machined? There are lots of variables.

Thanks for all the replys.

The case has not been machined, I have installed new rod bearings and crank bearings. I am holding down the cylinder with 2 steel plate on each side, similar to the pic Stugrays posted. I am using a feeler gauge to measure the deck height and a dial to get to top dead.

I will post some pics of the arrangement within the next few days.

Is there a minimum deck height to avoid the piston hitting the valves?

Thanks again

Hopefully someone else will chime in however I vaguely remember 0.5mm as the absolute minimum valve to piston clearance however that measurement isn't the deck height. Deck height often ends up being around 1mm however you really need to cc you heads. After that then decide what compression ratio you want then you can calculate what the deck height should be.

Did you cylinder jugs originally have any gaskets or shims? Did you reuse the same or did you change them?