It’s enlightening to know how to do it if you have enough guide to follow. It will not waste your time and you can avoid mistakes and control or lessen expenses.
In the engine valves installation, there are hints that let you realize that every valve is not to be inserted in any valve guide.
On the Toyota L engine valves are arranged from 0 to 3 marks. It is found on the flat surface of the valves. If you cannot find it there examine the whole valve to be sure that nothing will be interchanged rather they are in the proper places.
The arrangement should start from cylinder one which is the nearest to the front of the engine. If that is the case cylinder one receives exhaust and intake valves with no marks and the other cylinders receive theirs the valves with their own marks from 1 to 3 respectively.