Prius Needs New Coolant System. What To Do...

Since budget wasn’t mentioned so it’s not a concern, withdraw $65,000 and buy a new Tesla model Y. A member here recommends that, I’m just repeating his suggestion.

 

Without periodic cleaning of the EGR (Exhaust Gas Recirculation) system, say every 50k, you’ll likely have another blown head gasket, within 10k~20k. My 2 cents, it’s the EGR that’s responsible for the blown gaskets.

And almost no pros will do EGR cleaning for a reasonable price, which would be around $500. It’s basically some patient/thorough carbon cleanout that’s needed, and the components are somewhat tricky to get out.

In your shoes, I’d say best course is to sell it and move on to something else. Maybe other than Toyota? They did their EGR beta testing on 3rd gen owners, and no compensation.

(first 2 links in my signature have more info. If on a phone turn it landscape to see signature.)

 

The list doesn't include replacing the pistons and rings, and resleeving the block.

You should consider a short block or completely rebuilt engine with the revised pistons and rings.

Available from places like Hybrid Pit, they'll ship the engine out to the lower 48.



Posted via the PriusChat mobile app.

 

Only warranted with advanced oil consumption?

If DIY’ing the block, this shopping list is interesting. It’s USD $’s, a US dealership about 50~60 miles distant from us. You’d either be going with items 1 through 3, or 3 and 4.



Either way it’d be prudent to replace head bolts, but they were listed as unavailable…

 

The sleeves are spiny.

 

Really not enough information. How many miles? Sounds like the mechanic is going down the path of overheating as a cause for the head gasket failure, which could caused a warped cylinder head. Don't know why you need new ignition coils.

 

You were getting a $2000 head gasket repair for the price of a complete rebuild which is not what is listed on your sheet.

In reality a complete rebuild with pistons and rings is what you need and in some markets you can get it for about $4000.

Do some serious shopping and don't be afraid to go out of town.

 

Does OP have oil consumption, and if not is a block rebuild warranted? Could well be serious oil consumption, but no mention so far.

 

The only real fix includes the pistons, rings and updated intake with the rebuild done by a builder who verifies everything before reinstalling.

Otherwise the hg job will repeat months to several years down the line. Usually after the 90 day to 12 month warranty expires. The dealers have always known this; others are starting to catch on. Obviously a gen4 is far better but not the halfway gen3/4 frankenstein versions.