Gearing up to do the head gasket on a 2013 Prius Two with 199k miles. EGR cooler and pipe were completely clogged at 150k - worked fine after cleaning until 199k - never overheated to the best of my knowledge. Main components I plan to replace: (1) EGR Valve KIT - Toyota (04004-58137) (cheaper to buy the kit than just the valve!) (2) Gasket Kit Engine O - Toyota (04111-37316) (3) PCV valve (4) water pump (5) thermostat (6) spark plugs (7) coolant (8) head bolts (9) oil pressure sender (because it is weeping) (10) take cylinder head to shop to assess warpage, clean, inspect, and put in new valve stem seals Is there anything else I should replace? Particularly in the timing cover area and/or the camshaft areas? (I'm really weak about these, but I have a buddy who has done a few non-Prius head gaskets to help me out.) It should go without saying, I will completely clean out the entire EGR circuit (including intake manifold and throttle body). I have it on expert authority that the timing chain (almost) never needs to be replaced. (CARspec MN) Thank you!
I don’t have time to do it for you, but once you’ve settled on the main scope of work, I’d suggest to read carefully through the Repair Manual (more info) procedures, including all the cross-references, and make a list of all the non-reusable parts, mentioned as “new” in the Reassembly or Installation procedure text or shown with the ⚫︎ symbol in the Components illustrations, that will also need to be replaced as part of the job. This review will also help you identify fasteners, trim clips, special service tools, and other items you may need. (For example, do you have a 10 mm bi-hexagon wrench?)
For the head bolts. there’s some head gasket related Repair Manual excerpts, first HG related link in my signature. And second link is to @The Critic ’s thread.
Yes for some reason it was already in my toolbox and I hadn't worked on ZZ engines at that point. Except for AC comp replacements and alternator etc. So I'm not sure how I had the thing but it was in with my bits like torques and Phillips and security torques and all that mess I was actually quite surprised that I had it. And then I didn't use it except to disassemble the engine that broke just to remove parts.
