Removing and installing valves (Mondeo 1)

Attention! If the timing mechanism parts are to be used again, they must be installed in the place where they were before dismantling. To avoid confusion with the parts, we recommend preparing a shelf for their arrangement.

Removal

Remove the cylinder head and place it on two wooden blocks to avoid damaging any valves that may be open, see p. 1.5.

Remove the camshaft(s), see. pp. 1.4 and 1.12.

Remove the plate pusher and place it or mark it so that it can be installed exactly in its original place during assembly.



Remove the valve springs. To remove the conical valve cotters - and therefore the valves and valve springs - you will need a valve spring compressor offered by a specialist retailer.

Compress the valve spring, remove the valve key from the valve stem. Release and remove the spring compressor collet. Pull the valve down out of the cylinder head.

Remove all other valves in the same way

Remove the oil seals, refer to the section "Replacing the oil seals".

Installation

If you are installing used valves and a used cylinder head, you will need to check the valve guides before assembly. If you are installing all new valves in an old cylinder head, you will need to rework the valve seats in the cylinder head and lap the valves.



Using a wire brush and scraper, clean the valves of any combustion products that have accumulated on them.

Clean the carbon deposits from the valve stems where the valve crackers are in contact.

Lubricate the valve stems and guides with a thin layer of SAE 80/90 hypoid oil (machine oil), and install all valves exactly in their original place.

Install the lower valve spring retainer, possibly the guide ring.

Replace the valve stem seals, see relevant section.

Install the valve plates and springs on top.

Using a spring compressor, compress the valve springs and install the valve cotters so that the grooves in the cotters fit into the grooves in the valve stems. Release the valve springs.

Install the camshaft(s), see. pp. 1.4 and 1.12.

Diesel engine: adjust valve clearances, see paragraph 1.17.

Install the cylinder head, see p. 1.5 and 1.9.

The original version can be found on the website [FordBook]