Yep, this manual is compatible with the 3.5L 2GR-FE V6, including step-by-step procedures for removing and installing the oil cooler pipe.
And you’re right, that job can be a pain lol. The clearance around the oil cooler and those studs is super tight, especially with the exhaust and subframe crowding things. What usually helps is:
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Thread the studs after you’ve loosely positioned the pipe with the gaskets.
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Use a small dab of grease to hold the gaskets in place while lining it up.
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A wobble extension or stubby ratcheting wrench can save your sanity here.
If you need torque specs or diagrams, they’re all in the manual — makes it a lot easier to get it right without having to second-guess anything. Might as well get it if you're ready to get your hands dirty 👍🏻