I have the tundra 4.7 it's actually easy to work on my starter failed and they wanted 1100.00 at the dealer for parts and labor for six hours. i worked one side my nephew worked the other took 45 minutes and 115.00 to switch out the starter looks like an atv starter haha and if you need a coil you can get 8 off ebay for the price of one at a parts store I've used one so far in nine years have 7 extra still need to change the timing chain but good engines 180000 no smoke.
Good luck with that valve.