do i HAVE to replace the flywheel bolts? (1 Viewer)

[amaurer]

i got my flywheel out and am going to get it resurfaced now. i was reading old posts, however, and it seems like some people insist on replacing the flywheel bolts when you do a clutch job?? is this necessary??

my bolts and flywheel are in great shape, i would never have thought to replace the bolts until i read these posts.

if i do have to replace them, is toyota the only source? will a US stealership have them for the 3B? where else could i get them?

thanks!

 

[zuluzeugma]

Depends, are you a redneck or do you do things right the first time?

Just like U-bolts, when you torque them to spec, some plastic deformation takes place. Once you do it twice, necking will begin to occur. Do it two or three times and you will visibly be able to see a difference.

Do you HAVE to? - No. Should you? - Yes

 

[lostmarbles]

--------No comment

(But perhaps from this "no comment" you can guess what I do.)

 

[fastjim11]

Ain't skeered!....I didn't and never have!

 

[Degnol]

My own rule is....the deeper it is in the mix, the more likely I am to replace it.
If you own a cruiser and you are at the point of replacing the flywheel, you're balls deep anyway. IIRC, the flywheel bolts were about $3 x 6. Spend your Christmas money and go OEM.....from CDan.

GL

Ed

 

[amaurer]

::whine:: but i wanted to install this todaaayyyyyyyy!!

for what its worth, i went to a clutch shop to have the flywheel resurfaced and i asked them; they told me that needing to replace the bolts was a myth....

anyway, ill give CDan a call, I guess. I'm not saying he isn't awesome, but hes never been able to help me without a part number since this is diesel stuff. part numbers that i dont have, mind you..........

thanks.

 

[Pinion]

Dude, just reuse them.

 

[pportmd]

...haven't read about a broken flywheel bolt yet.

 

[ranger]

I've always reused the bolts and never had a problem.
I just clean them up on the wire wheel, put some locktite on them and torque em down.

 

[IDave]

50000 miles on reused....no problemo....so I reused them again!

 

[amaurer]

A lot of the old posts on here say something in the range of 50ft-lbs for the flywheel bolt torque. The 3B engine manual (if I'm reading this right) says 130 ftlbs.

Big difference. Can anyone confirm the 3B flywheel torque?

 

[fastjim11]

Why not use the manual instead of heresay? After all what better source... the factory specs?? Or am I missing something?

 

[lostmarbles]

Why not use the manual instead of heresay? After all what better source... the factory specs?? Or am I missing something?

Sorry to complicate matters but I advise that you DON'T always take what the Manual says as gospel. (Having said that, I still always refer to the Manual when doing an unfamiliar job.)

I don't know about this particular case, but I've had other instances where following "Manual Advice" has caused me problems that I wouldn't otherwise have had. - Including nearly stripping a thread because of an erroneous (excessive) torque specification.

These days, if the manual ever quotes a torque figure that appears excessive compared to my "common sense" - Then I ignore the Manual. (Toyota Manuals contain errors just like other written texts.)

(I admit that this advice will worry people who have little experience and rely on "Manual Information" but I feel I have to say it anyway.)

 

[pportmd]

50ft-lbs is nothing. I needed a cheater bar to loosen mine, so 150ft-lbs sounds about right. Think about the weight of the flywheel and the centrifugal force generated when it rotates at high speed multiplying the "weight" exponentially. Then think about the 6 punny bolts trying to keep that heavy wheel from flying away at 3000 RPM and destroying your bell housing, floorboard and amputating your leg as you are shifting into third gear in the interstate.

 

[lostmarbles]

50ft-lbs is nothing. I needed a cheater bar to loosen mine, so 150ft-lbs sounds about right. Think about the weight of the flywheel and the centrifugal force generated when it rotates at high speed multiplying the "weight" exponentially. Then think about the 6 punny bolts trying to keep that heavy wheel from flying away at 3000 RPM and destroying your bell housing, floorboard and amputating your leg as you are shifting into third gear in the interstate.

Yeah. I probably should convert it into Newton-metres to get something I'm more familiar with.

I never intended to imply that the 150ft-lb figure was incorrect.

(Sounds like you have a "vivid disaster-scenario imagination" just like me Pportmd!)

 

[amaurer]

I dont have an off-the-cuff sense for torque so I didn't really know if 130 was reasonable; it was just almost 3x the 50ftlbs I'd heard, so I wanted to be sure.

That said, once I got out there with a torque wrench, 130 ftlbs was definitely more like what I had to use to get them off, so thats what I went with.

Thanks! One more thread to start and this clutch job will be done!

 

[pportmd]

...just remembering the scene where a turbine engine wheel shears off half the airplane on "The Twilight Zone" movie.

 

[fastjim11]

Check this link for torque specs...just to double check.

US & Metric Bolt Torque by Grade