It is quite surprise that the service manual for this classic Toyota 3TG, 18RG and 2TG is well kept in the below link.
http://retrojdm.com/Scans/Toyota/Misc/Service%20Manuals/3T-GTEU%20Engine/PDF/00%20-%20Total%20Theory.pdf?fbclid=IwAR0Eo7IT5DRqDor3niP1x8Uk9yFjmhdgoo98IJJwX14iucGSU6-oGPoUZGk
http://retrojdm.com/Scans/Toyota/Misc/Service%20Manuals/18R%20Engine/PDF/05%20-%2018R-G%20Engine%20Service.pdf?fbclid=IwAR1V04sAzaOUn8Hqps6ALU5aSlT9XS5Ii_pY2-mXnqhePQ5gLWt4RkvXShY
http://www.retrojdm.com/Scans/Toyota/Misc/Service%20Manuals/T%20Engine/PDF/05%20-%202T-G%20Engine%20Service.pdf?fbclid=IwAR1q0JLbelwOqUf4EwcP4QF1p92WkyvDJZipGGAGoaigEcncQYfm_fWP6GY
