Engine Head Gasket / Cracked Head Repair (Toyota 3.4L V6 5VZ-FE ) - Part 4
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- Опубліковано 25 чер 2023
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This is Part 4 of a 7 part video series documenting the replacement of cylinder heads on the Toyota 3.4 L V6 5VZ-FE Engine. There’s many reasons why you might find yourself needing to remove the heads. You could have a suspected bad head gasket or cracked head. You could have a suspected issue with the head, like a burnt valve, and you need to rebuild the head. It could be because you’re rebuilding the entire engine. Whatever your reason to pull the cylinder heads, this video series will walk you through all the steps necessary to get the job done successfully.
In Part 4, we visit Yota1 Performance in Riverbank, California to show you how engine cylinder heads are torn down, inspected, vacuum tested, pressure tested, resurfaced and built up. We spend the day in their machine shop with Allen who has 45 years of experience in the Machining and Engine Rebuilding Industry.
Nick and Rebecca, the owners of Yota1 Performance, were gracious enough to invite us into their shop and let us do some filming. We owe a huge thanks to them!
We hope you enjoyed and appreciate the tech we were able to share with you in this video.
Happy Wrenching!
*Specialty Tools for Rebuilding Heads*
If you're looking for other tools not used in this video, check out Timmy's Master Tool List.
www.amazon.com/shop/timmythet...
*Valve Keeper Remover and Installer Kit amzn.to/43XxXGb
*Valve Seal Remover and Installer Kit amzn.to/4323B46
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Guys, THIS one was freaking awesome! Man, I sure learned a lot about these Toyota heads with the shim over bucket design/adjustment. I had already learned a lot about them due to my 3RZ total rebuild w/brand new genuine Toyota head (complete head built by LCE with Super Tech Inconel nitride coated valves, stiffer valve springs, hardened keepers, and Viton valve seals ), but this video took it to a whole new level. One of the many things I just learned from this master machinist is that with these type heads, an ever so slight clatter in the valve train is A GOOD THING, because it is much better that the valve lash be a tad loose vs too tight ( reference in the video: beginning at time stamp 10:10. ) Before this video, I thought hearing a slight clatter meant the valve lash may be in dire need of adjustment. This is some essential stuff guys. Also, it's neat to know that engines with solid lifters DO make a clattering sound.......and the lifter/buckets in these Toyota Z engines are indeed a type of solid lifter. Nothing hydraulic about them. But they sure are a pain to adjust the lash when needed.
We're happy to know you enjoyed what we were able to share in this video. It was actually the highlight of this whole job for me because of what I learned at Yota1.
Thanks for the comment. We appreciate it!
That's actually my dad, been taking apart and putting engines back together since he was a kid, he's amazing at what he does. He can typically diagnose whatever is wrong with my car with a basic description from me. Most reliable man on the planet, I can call him and all I need to say is "Dad, I need help" and he's there as fast as he can be, no matter the time or how far he has to go.
Hey Dakota, you're lucky to have such a great dad. We throughly enjoyed spending the day with Allen. He is a wealth of knowledge. As soon as I met him though, I thought he was going to start singing, "You gotta know when to hold em, know when to fold em, know when to walk away, know when to run. You never count your money, when you're sitting at the table, they'll be time enough for counting, when the dealing's done." He totally reminds me of Kenny Rogers. Anyway, your dad is a great guy. I hope I get to see him again. - Timmy
@TimmyTheToolman he's also a musician so sometimes he does randomly start singing. He's a wonderful man, I couldn't ask for a better dad and it's always fascinating watching him work.
@@dakotawallers3478I like him even more that he's a musician. Does he sing country western?
He mainly plays bass and typically country music
@@dakotawallers3478 Gotcha.
Tim you did an excellent job asking thoughtful questions so that the master machinist could pass on a wealth of knowledge. I will go back and watch this again.
Thanks Hugh. It was definitely an information filled day for us and I'm glad we were able to film it and share it on our channel. I am a bit surprised with the amount of views and commentary this video is getting. I thought more people would be stoked on it, but the response has been a bit tame so far. Maybe it will build some momentum as time goes on.
Still watching this. Pulling heads from the junkyard for inspection. Pretty fun. I have a 4Runner that made a ticking noise and the valve allegedly was loose and the didn’t have a big enough shim. Was close to spec but still runs well. No issues but I gotta be ready. I can’t afford another expensive hit. Lmao. Feels better to fix yourself
Good luck with the work.
Thank you for putting together this series of videos on the 5vz-fe. So much information presented.
You're very welcome Marvin. We're glad you appreciate the information shared.
It’s great getting to see my dad being able to show off his wide array of knowledge. Alan is one of the most intelligent and talented men I know although as his youngest daughter I am kind of bias 😂
We loved spending the day with Alan. I only spent one day with him, but I could tell he's an awesome person. The world would be a much better place with more men like him.
Thank you Al for your experience and craftsmanship.
I'm not sure Al will see your comment. He's not much into being on the internet, but we appreciate your comment. Thanks!
Tim and Sean this was a great video! Tim I didn’t think anyone knew more about Toyota’s than you but Allen is on a whole other level.
I’ve watched this video 2x! Great information.
Thank you both for sharing, and looking forward to the next video.
Yeah, I know a little. These guys that have been building engines for decades know a hell of a lot more than I do.
We're happy to know you enjoyed this video. More good episodes coming. 3 to go. Part 5 is a monster. Get yourself an extra large bucket of popcorn, some bon bons and some raisinets.
Great video, has a ton of great information. I remember the machine shop I took my heads to also comment on the meticulous nature of having to grind the valves a little bit at a time to get everything into spec. However, this video went to a whole nother level of detail, in explaining everything.
We're glad you enjoyed the video. We thought people would be stoked on the information shared by Allen. It was a great day we spent there. I learned a lot.
Timmy Thanks for the bringing us this 5VZ-FE motor head gasket repair.. exellent Job my friend TY..love info like this 🙂
You're very welcome Kenny. Glad you enjoyed it.
Outstanding, Tim!!
Thanks!
Wow! Very informative and detailed video. 👍
Thanks!
Another awesome video!! I fear people like Al are becoming few and far between. If I need some machine work on my 3.4 I know where I’m going.
There's fewer and fewer people going into this line of work. Most young people want a desk job where their hands don't get dirty. People willing to work in the trades will be able to name their salary. It's becoming a lost art. When I was a teenager, all my friends knew something about auto mechanics. Most kids these days don't know anything about it.
Great video guys
Thanks! We're glad you liked it.
A great work that deserves thanks❤❤❤❤
Thanks and you're very welcome!
Just incredible
Thanks! It was really cool spending the day in the machine shop at Yota1 Performance. We learned a lot!
Looks like they do great work. I wish they offered rebuilt heads on their website.
They definitely do great work, but they are more of an Engine Building Operation rather than a machine shop you bring your heads and block to for machining. It's easier for them to build new heads rather than rebuild OEM ones because coming up with good cores is hard. If the heads have cracks and they can't be repaired, the head is no good. They do sell new heads but it is dependent on their supplier.
Great video and great series. I always like the "field trip" vids... reminds me of Mr Roger's Neighborhood. I don't suppose Allen had any advice or opinions on lapping the valves?
We're glad to know you like the video and series overall. We like the field trips as well. I suppose you're no spring chicken like me if you remember Mr Roger's Neighborhood. I use to watch it when I was a kid.
They machine the valve seats and valves with their machines. He didn't think to ask how a DIYer could do it on their own.
Damn, that was the most interesting part so far. The guy's got a wealth of knowledge, he could have his own YT channel. Surprised to see the cracks starting to form but not an issue yet. I wonder if the SC had anything to do with it? Also, he said the caps have to have sealer 37:14 for the ends which I didn't know about. Wonder what happens?
The sealer is the black FIPG you put on those far most bearing caps when you do a valve cover gasket job. ***see part 5
- Sean
@@TimmyTheToolman Oh nice, just came out today. Happy 4th!
I replaced both my cylinder heads in 2019 going through the same process. I had the 2nd gen (black) TRD supercharger with URD 2.2 pulley and URD 7th injector on it. I also used the 170F thermostat vice the standard 180F thermostat. At the time, I had 210,121 mi on the engine and 130,000 mi of that was supercharged. The 4Runner now has over 250,000 mi. I had a lot of trips to Montana and was constantly boosting in the mountains. What I notice is that the 5VZ head cracks tend to happen with the #3 and #4 cylinders as mine was cracked on both. These hairline cracks are hard to see but you will notice white exhaust smoke and slight shutter when you start the engine in a cold day. Once the engine is warmed up, the initial shutter and white exhaust smoke goes away because the hairline gap closes. You can top off coolant once every couple of weeks and keep on driving it like that. Alternatively, you can spend the money and actually replace the cylinder heads. I end up replacing both side and put in new gaskets as well. Also replaced the supercharger rotors and bearings as well since the coating worn off. My guess is that #3 and #4 cylinder get the least cooling. Boosting all the time up the mountain probably didn't help. I used OBDLink to monitor my coolant temp and transmission temp during my drives. The coolant temp would go up to 210 - 215 deg (from normally 189-192F) during those climbs and my transmission temp would go up to 205 - 220 deg (from 150-170F). I do have external transmission cooler so that helps keep the transmission temp far below 240F.
That mechanic has Blacksmith hands!! At least twice as big as Tim’s hands…
You know what they say, small hands, small feet. Yeah, Allen is not only a Machinist, he's also a farmer. His family owns almond orchards.
These came out at a pretty good time I was in the middle of doing my head gasket. Had a ton of trouble along the way but finally have my heads off. the parts list is great but do you have a good head gasket kit i should buy?
Look at the video description for Part 5. We link a kit sold by Yota1 Performance.
Thanks for another great video Sean and Tim. Did Al say why the entire head would need to be scrapped if breaking a cam cap?
Yes, for most cylinder heads this is the case. The caps and head are line bored bolted in place, no two are the same.
Great explanation Tyler.
What is the part number for the Viton Valve Stem Seals?
We don't have a separate part number for them. Contact Yota1 Performance and they can probably sell you a set.
-97- ... 2 thumbs up!
Thanks!
Tim, another great and informative video. Given the mileage of the engine. It seems more economical to long block or purchase a complete remanufactured engine. Just sayin. Cheers, Mate.
Thanks Jack. The point you make is definitely a good one, especially if someone is going to pay a shop to replace the heads. The job Sean and I performed on his rig cost us our time but no expense in labor. When a shop like Yota1 gets a customer in that obviously needs heads replaced, they're going steer that customer into a rebuild engine every time because it's the safer and better use of funds for the customer.
But if he just installed a long block we wouldn’t get to see this awesome video!
@@ppeterson9359 So true!
@@ppeterson9359 Exactly 💯
How many miles are on Sean’s block. At what point does one decide to get a new motor
Thanks in advance Timmy! Such a cool series. I’m poor so I’m obsessed! Lol
Sean's engine had around 200k. The point you consider getting a rebuilt engine is when the lower end needs work, like there's signs you're losing compression via the piston rings. These engines are known to easily break the 400k mark, so it was a reasonable risk for Sean to just renew the top end of the engine. Time will tell if this was a good decision, but you will soon see in the last part what the compression numbers are now that he has rebuilt heads on his engine. Stay tuned...
Man you are an amazing person! Thank you
@@cbdreamer1709 I don't know how amazing I am, but Sean and I are just trying to do our part to help out our fellow man.
Is Sean feeling the regret of running that supercharger after seeing the condition of these heads?
I regret not running fuel mods to combat the lean conditions I was getting under low boost, low rpm, in high gear. But I don’t regret running a SC in the least. It breathes new life into a heavy truck. You can actually get up hills with ease. All heads will eventually develop cracks as shown in this part 4. Excessive heat hurts heads, not forced induction. As long as you are monitoring your engine temps and have a consistent air/fuel ratio, you’ll be fine.
- Sean
How common are cracked heads compared to head gasket failure?
I'm not sure. From my own experience though, I've heard more people report a cracked head than a head gasket failure. For the earlier models that had the composite head gasket, those are much more prone to failure than the newer MLS gaskets. If you have a newer model with the MLS gaskets, and you're having an issue like Sean was experiencing, the chances are it's a crack in the head because those MLS gaskets are really good.
@@TimmyTheToolman yeah... Mine was diagnosed with a cracked head a few years ago. We commented a bit about it in a 3rd gen group on Facebook a while back. I've been daily driving it and it somehow hasn't gotten bigger and or a worse leaking crack
@@MrJonnybgood619 I guess you just keep an eye on your coolant level? Are you getting a misfire?
@@TimmyTheToolman yep, misfire for about a minute, 2 on a cold morning. And a bottle of Toyota pink lasts me almost the full year, depending on how many cross country drives it's done...
@@MrJonnybgood619 Gotcha. Yeah, I guess you can just keep driving it like this for quite some time.
I wonder how many miles a resurfaced head is expected to get.
It could go for a very long time. Some heads don't develop cracks like Sean's head did.
How many miles on Sean's?
@@v--p 200k
How many kilometres did the engine have when it cracked?
Don't know the kilometer equivalent, but it was around 200,000 miles.
@@TimmyTheToolman wow that’s not even that high for a 4Runner , mine has around 136k miles and hope I’ll get more out of it without having cracked heads , 97 limited
@@TimmyTheToolman what year was this 4Runner? Is it cracked heads common for all 3rd gen years?
@@FonzoCapone Sean has been running a supercharger on that engine for quite some time. It might have something to do with it, but guys without superchargers have suffered a cracked head around the same amount of miles.
@@FonzoCapone 2002. Yes, a cracked head is fairly common. I can't give you a percentage chance of it happening if that's what you're looking for. Some guys can drive their rig for 400k+ miles and have zero issues. Other engines have major issues at half that mileage. The longer you keep and drive the vehicle, the better the chances go up that you'll face a major engine repair. But, I wouldn't sweat it. When you compare the cost of a new SUV that is on par with these rigs, to putting new heads on your engine or going for a complete rebuilt engine, it isn't that much money. I'd rather spend $3k on replacing heads or $5k putting a quality rebuilt engine in, than dropping $60k on a new SUV or Truck.