To remove the valve springs on the TR's while still leaving the heads intact is quite simple. I've done quite a few cars using the following method:
- Remove both valve covers
- Remove both sides of the rocker arm assembles.
- Remove pushrods.(note: take extreme care while removing the pushrods. They are coated with oil and can be quite slippery. It's very easy to drop one and have it fall down into the motor)
- Remove all 6 spark plugs.
- Apply compressed air to a cylinder.
- Take a small hammer and tap on the valve spring retainer. This helps unstick the keepers.
- To allow leverage to remove the springs , especially on the rear cylinders, I used an L-shaped valve spring compressor, and a small pipe, about 1" diameter and about 1/2 the length of the cylinder head.
- Drill 2 holes through the pipe so it can be mounted on the head using 2 on the rocker arm assembly bolts. the pipe will allow a place for you to get leverage to use the L-shaped compressor.
- Apply pressure and compress the valve spring. Take care as not to push the valve open. doing so will release the compressed air and have the valve to fall.
- Remove keepers with a magnet, remove retainer and valve springs. Now would be a great time to replace the valve seals if so desired. The exhaust valve doesn't use one.
- Install new spring. Compress with L-shaped compressor. Once again take car in compressing the spring as not to push the valve open.
- Install the keepers. Make sure they are seated properly in the grooves of the valves.
- After I install the spring I lightly tap each one to make sure the keepers are seated.
- Do the same for each cylinders. Install rocker arm assembles.
- Torque to proper spec. and feel the rpms climb.
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