4.2 RAV4 D4-D SCV Valves: Ok, here goes with the details I know about the SCV valves and their replacement on the 4.2 RAV4 D4-D. Or at least this is how I did it, maybe not the best way but it worked for me! I have yet to look on the official Toyota technical website to see if there are any better instructions in their service manual. Background: The symptoms were fairly similar to others who have posted on the forum, ie: loss of power, especially at the top end of the rev range above 3000rpm. S