1MZ-FE 3MZ-FE VVT Gear Camshaft Installation - Service Bolt - Toyota Camry Sienna Highlander RX300
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- For removal and installation of the exhaust VVT camshaft, it is required to use a service bolt to lock the camshaft gear sprockets in the correct position. This ensures the proper functioning of the Variable Valve Timing VVT system for the 3.0 liter and 3.3 liter 1MZ-FE and 3MZ-FE engines. These engines power a range of Toyota and Lexus vehicles including Camry Sienna Highlander RX300 and RX330.
The service bolt is M6x1.00x25. It should be threaded in the exhaust camshaft before removal from the engine, before loosening any journal bearing caps for intake or exhaust. It can be removed from the camshaft after both camshafts have been replaced on the engine, and all bearing cap bolts have been torqued to spec.
The exhaust VVT gear has two sprockets that are spring-loaded. The service bolt locks the two sprockets together while maintaining the correct spring tension beween them. This is required for correct operation of the VVT system.
If the exhaust camshaft is removed without the service bolt, the service bolt can be placed back on the VVT gears off-engine, following the procedure in this video.
As the owner of a Camry with the 1MZ, this channel has really helped out a lot. Thankyou
Thank you for watching and for commenting.
Thank you, you just saved me, Im doing one of these at my work and forgot about the service bolt
Often overlooked. Thanks for watching.
Thank you Sir. Your video answered my question
Thank you for watching and for commenting.
A year later here I am saying I’m glad I seen this before removing the cams and head to do a bent valve job caused by a snapped timing belt
Better late than never, I guess.
@@Merryfrankster_ well I watched your video on if the 1mz is an interference motor or not and based off what I saw it is not an interference motor so now I’m convinced that maybe the motor does not have bent valves
@@Hondabuildsandbikes correct it is an non-interference motor, but it's possible to drop a valve, or to have a damaged ring land, that can interfere with engine rotation.
After the timing belt broke, we put a timing belt kit in the car before reassembling all the motor mounts and what not. We just cited to crank the car and it sounds like it has a slight miss If it were up to completely dropped a valve, it wouldn’t even run and I would definitely hear it in the rotating assembly
Thanks 🙏 just saved me...
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Thank you!
Thank you for watching and for commenting.
I'm putting mine back together putting the camshafts in I did that once and I had trouble compression on one side of the motor I just did a leak down test on it it's fine there's no bent valves. what could I have done wrong It was the right side of the engine The camshafts will put the double dots matching is that top dead center? according to the marks on the pulleys that's 180° out. All I know is I did not get compression I'm trying to figure out why. Thanks for your help and your videos
@@marcavus1 If your have good leakdown test and you have no compression this means that the valve timing is not correct in other words the timing belt is not installed correctly.
Cheers Frankster. Thanks for recommending that I check this video out first. Where do I get the service bolt from? It looks like I could possible use on of the quarter panel bolts.
You can use any M8x1.25 bolt from anywhere.
Great !
Thank you for watching and for commenting.
Just got done doing the heads on a 4.7 tundra installed the service bolt and all the timing marks lined up perfectly. Now there’s a ticking noise at idle but as soon as I put it in gear or start driving it goes away
Maybe use a mechanic stethoscope to pinpoint the source of the noise at idle.
Great tip, thanks . What happened to this particular engine
This is a low mileage engine being prepared to go in a car to replace an engine that is fully sludged up.
Hi again Frankster..... you didn't mention that the service bolt hole is on the bottom of the rear bank when at TDC. Front bank was easy. How do I get the service bolt in the rear intake cam with regular size hands? There is no room to swing the ratchet or spanner. Any ideas? Cheers.
um obviously it can be done. try think of something. Or just remove the cam, then use a pulley tool to put the service bolt in before you re-install it.
@@Merryfrankster_ cheers, I was thinking of getting or making a pulley tool but I'll still have trouble getting the service bolt out when it's reinstalled....
The service manual says to rotate the cam shaft with spanner, insert service bolt. page 14. cheers. (doesn't say but implies) rotate back to cam shaft timing marks, then remove. I'm going to give that a try.
Hi Frankster, me again..... how do I get the timing belt cog off the camshaft to remove it without buying a special tool for $200? Will a rattle gun get it off? Cheers & Thanks again,
Impact should do it in most cases. If that does not work, you can set a breaker bar against the lower control arm and jog the starter. By the way in one of my tips and tricks video I have a link to a very affordable removal tool.
th-cam.com/video/tTtuxpIEuEk/w-d-xo.html&pp=gAQBiAQB
@@Merryfrankster_ Thanks again Frankster.
Hi I'm getting ready to change a timing belt on a Lexus 3.3L 2004 and later on a 4.0 1uz 1995 .. both of these vehicles belong to me. I don't want these camshaft to move when I'm removing and installing the new timing belt what tool do you recommend exactly to keep these camshaft from moving I'm afraid of making a mistake... I really like your advice
Follow the instructions of the factory service manual for the 3.3. Turn the crankshaft to TDC on cylinder 1, then remove the belt, then turn the crankshaft backward 60 degrees and leave it there. Then you can move the camshafts any way you want, safely, because the valves cannot come into contact with the pistons. When you are ready, get the camshafts back into position with the marks, turn the crankshaft forward to TDC, and put the belt on. For the 95 1uz-fe, this is a non-interference engine, there is nothing to worry about.
great video i have a 3.3 toyota sienna had cam codes the cam with on front that holds the timing belt snapped can I just replace the cams
I'm sorry I don't understand what you mean. You snapped a camshaft? The camshaft broke?
@@Merryfrankster_ yes the front camshaft broke i think the the VVT went on it causeing the camshaft to break my question is can I juat replace the camshafts and timing belt or do i need to do a ful lengine rebuilds
I can't find this tool anywhere. I just changed the head gaskets and I didn't use the service bolt. I have some codes indicating timing is off. I want to fix this issue when I re do the timing. where can I get this tool.
It is just a simple M6x1.00 bolt.
@@Merryfrankster_ I was talking about the tool you used. LOL anyway i found something and got the service bolt in and now it's doesn't sound like a diesel anymore. YAY
@@againjoe right on.
@@Merryfrankster_ where can I find the pulley tool for the service bolt. Thank you.
@@MAXSPEED77 I don't know where you can find one exactly like mine, but you can find a lot of pulley holder tools like this one: www.amazon.com/GearWrench-3472-Pulley-Holder-Clutch/dp/B0002SRGE8
Did the bolt come out on the other side of the camshaft after u tighten it or did the bolt just hold the camshaft body instead without coming out at the end?
The bolt is inserted before you remove the camshafts from the engine, before the exhaust and intake camshafts are separated,. It is removed after you install the camshafts and mate them together. The bolt ensures that the gears from the intake and exhaust camshafts are mated together correctly. Watch the full video on removing and installing the camshafts.
to be honest I have absolutely zero idea what you are asking.
I have a question regarding reply RTV sealer underneath the bearing cap E1 where close to the LH camshaft oil seal. Do I need to install the service bolt before loose up the caps? I'm not removing the shaft I just need to loosing up all the bearing caps and retorque them down bolts. Do you have any suggestion? Thank you!
Installing the service bolt while the camshafts are in place in the car takes less than one minute of your time and saves you from a lot of issues and hassles should something unexpected happens. Don't forget to remove it when you're done. You don't need any special bolt, any M8x1.25 bolt will do the job - I think that's the right thread, I don't remember too clearly.
where is the service bolt located?
It's on the VVT gear.