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Old 09-04-2019, 11:07 PM #1
Fadiddy Fadiddy is offline
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Flywheel bolts vs. Flexplate bolts???

Guys,

I am ready to install my rebuilt 5VZFE in the 2000 T4R. When I went to install the flywheel....I believe I have the right bolts (8) but I am confused what the (6) bolts look like for the flexplate to the torque converter.

Anyone have a picture of the two types of bolts? Would greatly appreciate it. Also, can either of these bolts be reused?
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Old 09-05-2019, 12:27 AM #2
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Torque converter bolts have a washer on them and usually one of them is black that has a shoulder on it to center the flex plate to the torque converter. Flywheel bolts are usually thicker and don’t have a washer in them. They are both reusable but have to apply some type of anaerobic sealer on them.
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Old 09-05-2019, 12:31 AM #3
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I think theres a miscommunication in part names.

An auto does not have a flywheel. It has a flexplate. The bolts between the flexplate and the crank will be shouldered, the bolts between the flexplate and the torque converter are smaller and have a locking washer.

A manual has a flywheel, and those bolts (to the crank) are usually longer than flexplate bolts because the flexplate is much thinner than a flywheel.
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Old 09-05-2019, 08:21 AM #4
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There are 8 largish bolts that hold the flex plate to the crank shaft. There are 6 smallish bolts (12mm or 14mm, can't remember) that connect the flexplate to the torque converter. I used red loc tite on both the 8 bolts that hold the flex plate on to the crank shaft and the 6 bolts that connect the flexplate to the torque converter.

The six smaller bolts are maybe only 3/8" to 1/2" long.

As it's already been stated, auto tranny's use a flex plate and manuals have a fly wheel.
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Old 09-05-2019, 10:47 AM #5
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Quote:
Originally Posted by toyotaspeed90 View Post
I think theres a miscommunication in part names.

An auto does not have a flywheel. It has a flexplate. The bolts between the flexplate and the crank will be shouldered, the bolts between the flexplate and the torque converter are smaller and have a locking washer.

A manual has a flywheel, and those bolts (to the crank) are usually longer than flexplate bolts because the flexplate is much thinner than a flywheel.
Thank you for the clarification, so auto's have a flexplate and manuals have a fly wheel.

Here are the bolts I reused (with loctite red), I think they are the right ones for the flexplate:



Ignore the cross marks as I marked them to know which ones I torqued. Are these the right bolts?...they have factory white paint on the heads. If so, which bolts are then used for the flexplate to the torque converter?

Also, i believe I installed the front and rear flexplate spacers correctly....one has a guide on it to fit in the crank, and the other I based off of the bolt scores previously. I assume they are installed right. Hard to tell because of the spacers lip curved like a dish.

Thank you all for your help.
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Old 09-05-2019, 12:06 PM #6
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The OEM flexplate bolts (flexplate to crank) do have the white painted heads. I haven't taken one off, so I can't help with the spacer setup.

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Old 09-06-2019, 08:36 AM #7
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I'm coming up with PN 90119-09009 for the 6 bolts that connect the flexplate to the torque converter.

TORQUE CONVERTER, FRONT OIL PUMP & CHAIN (ATM). Toyota 4Runner | Germain Toyota, Naples FL

It's been a while since I've removed a flexplate so I cannot be certain of the orientation. Hopefully someone else remembers or you can find something online.
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Old 09-06-2019, 11:10 AM #8
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Quote:
Originally Posted by thegipper View Post
I'm coming up with PN 90119-09009 for the 6 bolts that connect the flexplate to the torque converter.

TORQUE CONVERTER, FRONT OIL PUMP & CHAIN (ATM). Toyota 4Runner | Germain Toyota, Naples FL

It's been a while since I've removed a flexplate so I cannot be certain of the orientation. Hopefully someone else remembers or you can find something online.
Awesome! Thanks bud, this helps. I will order the six new bolts asap, the 8 I think can be reused and I also have some thread locker on them.

So, just to confirm, the 6 bolts are all the same size?
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Old 09-06-2019, 11:54 AM #9
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Flexplate to torque converter bolts are all the same.

Happened to be pulling the torque converter off this motor yesterday.... here's a shot of the bolts. Can't pull the flexplate bolts as the motor left yesterday.

The torque converter bolts have a 14mm head, I would assume that translates to an M10 thread
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Flywheel bolts vs. Flexplate bolts???-20190905_120700_compress68-jpg  Flywheel bolts vs. Flexplate bolts???-20190905_120646_compress29-jpg 

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Old 09-06-2019, 12:16 PM #10
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Quote:
Originally Posted by toyotaspeed90 View Post
Flexplate to torque converter bolts are all the same.

Happened to be pulling the torque converter off this motor yesterday.... here's a shot of the bolts. Can't pull the flexplate bolts as the motor left yesterday.

The torque converter bolts have a 14mm head, I would assume that translates to an M10 thread
Thank you very much for this!

I also went to Toyota this morning, and to my surprise, of the 6 bolts, one is actually different. Two different part numbers for the 6 bolts....5 have the same part number, and one is different. The parts guys showed me the diagram, and it labeled one as a "locking" nut with green paint, and the rest in yellow paint. I also ordered new flywheel crank bolts....all eight of them. I know it was overkill, but better to be safe than sorry....don't want to take this apart again, lol.

By chance, do you know the orientation of the two spacer plates that go in front or behind the flexplate?

Thanks again!
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Old 09-06-2019, 01:31 PM #11
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Quote:
Originally Posted by Fadiddy View Post
Thank you very much for this!

I also went to Toyota this morning, and to my surprise, of the 6 bolts, one is actually different. Two different part numbers for the 6 bolts....5 have the same part number, and one is different. The parts guys showed me the diagram, and it labeled one as a "locking" nut with green paint, and the rest in yellow paint. I also ordered new flywheel crank bolts....all eight of them. I know it was overkill, but better to be safe than sorry....don't want to take this apart again, lol.

By chance, do you know the orientation of the two spacer plates that go in front or behind the flexplate?

Thanks again!
Can't agree more, why leave the integrity of your engine up to a re-used bolt? I've read of a few horror stories where lock-tite was skipped and the flexplate bolts found a way out which led to it cracking.
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Old 09-06-2019, 03:33 PM #12
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Can't agree more, why leave the integrity of your engine up to a re-used bolt? I've read of a few horror stories where lock-tite was skipped and the flexplate bolts found a way out which led to it cracking.
You need locktite or sealant on those bolts anyway - otherwise you will get an oil leak behind those bolts! (same deal on a number of other Toyota motors - personal experience talking...)

Generally, those bolts are not recommended to be re-used...

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Old 09-07-2019, 08:55 AM #13
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I reused mine but I did put a healthy coating of red loc tite on them.

I also don't remember one of the bolts being different and they all seemed to go back in just fine. The torque spec is pretty low if I remember correctly. I think the actual bolt dimensions are identical on all 6 of them.
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Old 09-07-2019, 08:24 PM #14
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As a general rule you dont need to replace bolts unless they're TTY (torque to yield.... like a head bolt that has a sequence of 45 ft/lbs + 90*+90*)... or if the bolt is rusted or stripped, obviously.

Usually these bolts are far more capable than what they're used for.

In nearly 20 years and who knows how many cars... the only major bolts I've snapped (excluding the FJ40 which was really just a rust bucket and you hope to snap bolts undoing them) the only major component bolts I can remember snapping was a headbolt on a twin cam Saturn where the owner didn't want to buy new bolts.

In super low budget times I've even reused TTY bolts on 4age/7age builds without any incident.

I would suggest for those who are a bit paranoid or aren't super comfortable doing the work to replace bolts as suggested by the FSM.
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