2010 Head Gasket Replacement - fsm, recommended parts, and tips?

My 2010 Prius III finally spit out the head gasket at 240k.

Quick onset of misfires on start-up from cylinder #1. Originally thought it could be spark plugs or coil packs which were long over due, but the misfire progressed to multiple cylinders and I started losing coolant at a quick pace.

It isn't in the engine oil yet, and I haven't driven it since I realized it was a head gasket, so I think I should be OK on pistons and connecting rods, but I will check for bent rods.

I am going to do the work myself because I can't see putting 2-3k of service hours into a vehicle with this type of mileage, and I don't want to just junk or sell the car because it is in good condition and drives great excluding this new issue. Never had any CEL's before this happened.

I am reading lots of threads but I am hoping I can get some advice from others that have tackled this. I have done full engine rebuilds before (minus the machining) so this within my abilities if I take it slow and get the right procedures.

First is there an online resource for the factory service manual. It would be helpful to have all of the correct torque specs.

For parts, I was going to go with the Toyota gasket kit. Here is the parts list I am building:

Engine Gasket Kit, 04111-37316, replaces 04111-37310, 04111-37312, 04111-37313, 04111-37314, 04111-37315. 04111-37315 was the original part that is referenced in a related TSB for this engine. https://attachments.priuschat.com/attachment-files/2022/05/222165_T-SB-0169-16_oil_consumption_fix.pdf Looks like a decent price for a full factor gasket kit. here: https://toyotaparts.mcgeorgetoyota.com/oem-parts/toyota-gasket-kit-engine-o-0411137316 but open to suggestions on cheaper option.

I don't have a good list of what is in the gasket kit does anyone know what gaskets and seals aren't included? Water pump gasket? Cam seals and crank seal? Does this kit have valve guide seals?

New cylinder head bolts: 90910-A2011, replaces 90910-02166 ; https://toyotaparts.mcgeorgetoyota.com/oem-parts/toyota-engine-cylinder-head-bolt-90910a2011?c=cT05MDkxMC0wMjE2Ng%3D%3D . Not sure yet how many cylinder head bolts the engine has yet, the FSM should clarify.

Are there other things I should replace while I have this torn down? I want to save as much money as possible but I don't want to miss things that I will kick myself for later.

If this was a timing belt engine I would be replacing the belt and tensioner... should I be replacing the timing chain, tensioner or guides? Chain seems unnecessary since it is a lifetime component.

Any hoses that are impossible to replace normally but easier during this amount of disassembly?

Final question, are there are factory tools that would make this job easier to do? I am thinkin it can be fully tackled without special tools, but sometimes they help.

Thanks! Wish me luck!

 

Thanks Chapman, that is very helpful.

Any opinion on whether the Alldata DIY subscription is comparable to the Toyota TIS subscription for these purposes?

I am looking at 90 dollars a month for the Toyota TIS, versus 60 dollars for an annual DIY subscription for single model at Alldata.