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TC bolt tightening sequence #3065739
08/06/22 11:58 AM
08/06/22 11:58 AM
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Florida
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Mating up my 518 to Gen 3 Hemi,
Torque converter to flex plate spec is only 25 ft-lbs.

Any reason to go in steps, 15, 20, 25, or just go straight to 25 on each bolt?

Thx

Re: TC bolt tightening sequence [Re: BDW] #3065774
08/06/22 01:57 PM
08/06/22 01:57 PM
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Fulton County, PA
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CMcAllister Offline
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Rotate the thing and just get them snug to make sure nothing is jammed up. It should pull up and seat on the flex plate easily. I rotate the thing around a few times just tightening as I go to the desired tightness. One of the few places I don't use a torque wrench.

25 is not real tight. Just a few little ooga-doogas with a long wrench.


If the results don't match the theory, change the theory.
Re: TC bolt tightening sequence [Re: CMcAllister] #3065777
08/06/22 02:01 PM
08/06/22 02:01 PM
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Rio Linda, CA
John_Kunkel Offline
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And red Loctite.


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Re: TC bolt tightening sequence [Re: John_Kunkel] #3065780
08/06/22 02:19 PM
08/06/22 02:19 PM
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fredericksburg,va
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cudaman1969 Offline
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What they said, just make sure they all started before tighting. I use a short box end wrench to make sure I don’t get to tight

Re: TC bolt tightening sequence [Re: BDW] #3065793
08/06/22 02:48 PM
08/06/22 02:48 PM
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Cab_Burge Offline
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If you don't have a good 1/4 or 3/8 drive inch lb. torque wrench borrow or buy one and then multiply the Ft. lbs. by 12 to get the inch lb. of torque needed to tighten it, Example 23x12=276 Inh lb. scope wrench twocents
The reason I do that is most 1/2 drive torque wrenches aren't very accurate or good below 25 Ft. Lb. twocents work scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: TC bolt tightening sequence [Re: Cab_Burge] #3065803
08/06/22 03:09 PM
08/06/22 03:09 PM
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Sniper Offline
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What Cab says is correct, most torque wrenches are most accurate in the middle of the scale and least accurate at either end. Torque wrenches are cheap enough anymore that I have three that cover the gamut of what I need. 0-250 in/lbs, 10-100 ft/lbs and 50-250 ft/lbs will about cover all you need unless you are a diesel mechanic or something. I also have a torque screwdriver that handles the really small stuff, but I only use it for carbs.

Re: TC bolt tightening sequence [Re: Sniper] #3065816
08/06/22 03:47 PM
08/06/22 03:47 PM
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cudaman1969 Offline
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Lock tight and my hand, always the same torque after 50 years. Not one has come loose.

Re: TC bolt tightening sequence [Re: CMcAllister] #3065818
08/06/22 03:53 PM
08/06/22 03:53 PM
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Atlanta, GA
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Originally Posted by CMcAllister
Rotate the thing and just get them snug to make sure nothing is jammed up. It should pull up and seat on the flex plate easily. I rotate the thing around a few times just tightening as I go to the desired tightness. One of the few places I don't use a torque wrench.

25 is not real tight. Just a few little ooga-doogas with a long wrench.


Yup long shank slim 1/2 drive snap on wrench and locktight. Just don't try to gorilla them and it will be fine.

Re: TC bolt tightening sequence [Re: cudaman1969] #3065828
08/06/22 04:22 PM
08/06/22 04:22 PM
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Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.


Probably the lock tite and not the hand doing that. Never used lock tite, never had one come loose that I installed either.

Re: TC bolt tightening sequence [Re: Sniper] #3065851
08/06/22 06:14 PM
08/06/22 06:14 PM
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Originally Posted by Sniper
Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.


Probably the lock tite and not the hand doing that. Never used lock tite, never had one come loose that I installed either.


You mean to tell me you can’t ‘feel’ the right torque after pulling wrenches that long?

Re: TC bolt tightening sequence [Re: cudaman1969] #3065864
08/06/22 07:11 PM
08/06/22 07:11 PM
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47 years of installing race transmissions and I’ve never found the need to use a torque wrench. But like said earlier I also use red loctite


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: TC bolt tightening sequence [Re: pittsburghracer] #3065867
08/06/22 07:40 PM
08/06/22 07:40 PM
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Thx for the replies, the 70 FSM says 270 in-lbs,

My 1/4" TW only goes to 200
So I'll use my 5-80 ft-lb 3/8" drive

Re: TC bolt tightening sequence [Re: cudaman1969] #3065887
08/06/22 08:26 PM
08/06/22 08:26 PM
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Originally Posted by cudaman1969
Originally Posted by Sniper
Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.


Probably the lock tite and not the hand doing that. Never used lock tite, never had one come loose that I installed either.


You mean to tell me you can’t ‘feel’ the right torque after pulling wrenches that long?


Not a matter of feeling it, it's a matter of knowing it without a doubt. I don't care to do a job more than once.

Re: TC bolt tightening sequence [Re: Sniper] #3065946
08/06/22 11:50 PM
08/06/22 11:50 PM
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cudaman1969 Offline
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Originally Posted by Sniper
Originally Posted by cudaman1969
Originally Posted by Sniper
Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.


Probably the lock tite and not the hand doing that. Never used lock tite, never had one come loose that I installed either.


You mean to tell me you can’t ‘feel’ the right torque after pulling wrenches that long?


Not a matter of feeling it, it's a matter of knowing it without a doubt. I don't care to do a job more than once.

Knowing when to use a torque wrench is the key, I don’t need to use one putting on fender bolts.

Re: TC bolt tightening sequence [Re: cudaman1969] #3065957
08/07/22 12:41 AM
08/07/22 12:41 AM
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Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.

Do you have one of those calibrated elbows also whistling grin wrench


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: TC bolt tightening sequence [Re: Cab_Burge] #3065977
08/07/22 08:12 AM
08/07/22 08:12 AM
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fredericksburg,va
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cudaman1969 Offline
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Originally Posted by Cab_Burge
Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.

Do you have one of those calibrated elbows also whistling grin wrench

Long gone, locks up to much now like all the other joints lol

Re: TC bolt tightening sequence [Re: BDW] #3065995
08/07/22 09:36 AM
08/07/22 09:36 AM
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Like was already said.
Red Locktight.
Finger tighten all bolts to be sure they are aligned.
Tighten tight without torque wrench. I always felt given the size of the bolts inch lbs was too little.

and

NEVER use washers on TQ.

You would be surprised how often I have found this. Usually shows up as loose bolts that create lots of noise and often a front pump chewed up from the TQ moving around.

Also I am sure you know but TQ bolts are not regular bolts. They have short heads to clear the tranny/engine.

No need to do the stepped torque but it won't hurt. I always check the bolts 2 times anyway. Don't as why i started doing that. LOL


Re: TC bolt tightening sequence [Re: Cab_Burge] #3066014
08/07/22 11:10 AM
08/07/22 11:10 AM
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TJP Offline
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Originally Posted by Cab_Burge
Do you have one of those calibrated elbows also whistling grin wrench


I do, developed it about 50 years ago after stripping out many threads spank, Still works well smile It's actually developed the ability to "FEEL" the threads pulling while tightening or loosening shock beer

Re: TC bolt tightening sequence [Re: Sniper] #3066053
08/07/22 02:24 PM
08/07/22 02:24 PM
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Rio Linda, CA
John_Kunkel Offline
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Originally Posted by Sniper
Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.


Probably the lock tite and not the hand doing that. Never used lock tite, never had one come loose that I installed either.



Read the recent thread here about "place bolts". Most of the factory converter and flexplate bolts were place bolts that need nothing additional but, since there are other types of bolts used nowadays, Loctite is cheap insurance.


The INTERNET, the MISinformation superhighway
Re: TC bolt tightening sequence [Re: John_Kunkel] #3066082
08/07/22 04:33 PM
08/07/22 04:33 PM
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cudaman1969 Offline
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Originally Posted by John_Kunkel
Originally Posted by Sniper
Originally Posted by cudaman1969
Lock tight and my hand, always the same torque after 50 years. Not one has come loose.


Probably the lock tite and not the hand doing that. Never used lock tite, never had one come loose that I installed either.



Read the recent thread here about "place bolts". Most of the factory converter and flexplate bolts were place bolts that need nothing additional but, since there are other types of bolts used nowadays, Loctite is cheap insurance.

Since the 90s all the converter bolts (at least the ones for dodge trucks) come with loctite on them and to not reuse the old ones.

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