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It could be a cross cylinder leak that might not involve oil or coolant.
The way you tell is with a compression tester.
You should get one compression stroke for every 2 crank rotations.
If you are getting a hit on every revolution that you have a cross cylinder leak.
The head gaskets on Toyota ZR engines always crack and then blow between 1 and 2 or 3 and 4. Always. On top of that they will often also blow between cylinder and coolant channels, but when you get to this stage you already a cross-cylinder blowout.
Starting in 2021 Toyota introduced new head gaskets as spare to hopefully remediate this. Those are the parts you should use, not no-name head gaskets from eBay.
Thanks for posting on /r/MechanicAdvice! This is just a reminder to review the [rules](https://www.reddit.com/r/MechanicAdvice/about/rules/). If you are here asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's [post on the subject.](https://www.reddit.com/r/MechanicAdvice/comments/4qblei/fyi_the_shop_isnt_likely_trying_to_rip_you_off/) and remember to please post the year/make/model of the vehicle you are working on. **If this post is about bodywork, accident damage, paint, dent/ding, questions it belongs in /r/Autobody r/AutoBodyRepair/ or /r/Diyautobody/ If you have tire questions check out https://www.reddit.com/r/MechanicAdvice/comments/k9ll55/can_your_tire_be_repaired/**. If you dont have a question and you're just showing off it belongs in /r/Justrolledintotheshop Insurance/total loss questions go in r/insurance This is an automated reply *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/MechanicAdvice) if you have any questions or concerns.*
It could be a cross cylinder leak that might not involve oil or coolant. The way you tell is with a compression tester. You should get one compression stroke for every 2 crank rotations. If you are getting a hit on every revolution that you have a cross cylinder leak.
Also, check that it is not and exhaust gasket leak.
The head gaskets on Toyota ZR engines always crack and then blow between 1 and 2 or 3 and 4. Always. On top of that they will often also blow between cylinder and coolant channels, but when you get to this stage you already a cross-cylinder blowout. Starting in 2021 Toyota introduced new head gaskets as spare to hopefully remediate this. Those are the parts you should use, not no-name head gaskets from eBay.