Torqueing Manifold bolts
 

I torqued my manifold bolts to 55 lbs. Do I re torque hot or let it cool first?

Re: Torqueing Manifold bolts
 

55# ? And nothing broke ? They should be checked and snugged up a couple times. 30-40# is plenty. There is also a right and wrong way to install the clamps.

Re: Torqueing Manifold bolts
 

I'm also very surprized you didn't break the manifolds. Whoever said the nuts should be torqued to 55 lbs. should have his nuts torqued to 55 lbs.:D:p

Even if the nuts and studs can take 55 lbs, that doesn't mean the ears on a cast iron part can take it. Hand tight is how much to tighten them. No torque wrench needed. :eek:

Re: Torqueing Manifold bolts
 

Wow you got lucky with nothing broken it's time to buy a lottery ticket :)

Re: Torqueing Manifold bolts
 

[QUOTE=Tom Wesenberg;649658]I'm also very surprized you didn't break the manifolds. Whoever said the nuts should be torqued to 55 lbs. should have his nuts torqued to 55 lbs.:D
You rang? Dog:cool: here, don't scare me none, MIGHT scare Ol' Bill??
Ol' Bill always torks them 55# & never broke one & never has "hissy" or "poofy" manifold noises, 'cept once when he used a funny black 1 piece gasket. He found some paper lookin' manif. gaskets & just laffed!!?? COPPER is the ONLY 1 he uses, retorked twice when COLD! So, THERE! Buster T.:cool: (We gonna' go watch NASCAR racin' now, Ol' Bill wishes they had 1 NASCAR race, just for Model A's, HAVE CAR, WILL TRAVEL!)

Re: Torqueing Manifold bolts
 

Here is Henry Fords torque wrench. Found in every tool kit and guaranteed to work every time.

Re: Torqueing Manifold bolts
 

I torqued mine to 20 or 25 retorqued again a few weeks later to same and no leaks. I think one of the manuals have a high torque spec in them but having worked on 40's engines I knew better

Re: Torqueing Manifold bolts
 

I guess I'm lucky nothing broke. I guess re-torqueing will not be necessary.

Thanks

Re: Torqueing Manifold bolts
 

Re: Torqueing Manifold bolts
 

I would not torque bak to 55 maybe just up to the same on all.

Re: Torqueing Manifold bolts
 

Dont use a torque wrench on the manifolds!Just use an 8" ratchet on them & snug them down ,working out from the center.Then recheck after a run.Why people insist on using a T-wrench on an A-except for cyl head,is beyond me.

Re: Torqueing Manifold bolts
 

I would consider un-torquing them and just snug them up. I would be afraid of the cracking after heating up because they won't be able to expand under that much pressure.

Re: Torqueing Manifold bolts
 

I agree. I've been at national meets and seen people use a torque wrench on the manifold nuts and break the manifold ears at 30 lbs.:mad:

Re: Torqueing Manifold bolts
 

I just put a different manifold on mine, based on the books I have and some previous posts on this site I torqued mine to 35# not all at once worked up to it. In the past on other engines I have found it is best to have each nut the same amount of tight, helps keep everything evan and reduces the chances of warping. I say use a small torque wrench set at low #'s so things are the same, can't hurt and better than guessing.

Re: Torqueing Manifold bolts
 

Ditto with everyone. I've torqued to 30 to 35 lbs, making sure the manifold ears are on the same plane(level, flat, whatever). I start torquing the inner two first, just to make sure I don't trap a bow which for sure will break the manifold. Since there were no torque specs back in Model A production, it appears that many think that since it's the same size as a head stud, it needs the same torque or they are using modern max torque charts for that size. Logically, it doesn't have compression working against it like a head.

Re: Torqueing Manifold bolts
 

Alright guys, you have me convinced. I went back and took the manifold off. Fortunately nothing was cracked or broke. I went back and torqued them to 30 lbs. I pretty sure I can put 30lbs on the bolts by hand without a torque wrench and its just a guess if everything is evenly torqued. I'll put the muffler back on tomorrow and crank it again.
As always, thanks for you input.

Re: Torqueing Manifold bolts
 

Re: Torqueing Manifold bolts
 

So your Dad raised you?:D:rolleyes:

Re: Torqueing Manifold bolts
 

Now! that's FUNNY:D Love you, Mike, you made my day;) Interesting tidbit, wherever my Mamma went to high school in the "old days", she took a class in Automobile Electrical which helped her land a job with Douglas Aircraft in Oklahoma City during WW11. She worked on an assembly line doing radio recievers/transmitters. She taught me quite a bit of basic auto electrical while "holed-up" in a boarding house as I was having treatments/surgeries from the ravages of Polio I acquired in 1937. Chief was doing his war effort at a magnesium foundry in Las Vegas where we caught up with him later. The Navy didn't want him, "FLAT FEET"!
I've had a great life. Happy Mother's Day, Momma!
Bill W.

Re: Torqueing Manifold bolts
 

It just goes to show that even the local "Model A Guru's" can give advice that doesn't seem to check out with many, many other people's advice. I was told to torque mine up to "55#, no more no less, same as head bolts." Sometimes it's hard to know who to listen to, especially when you're just learning about everything, but I suppose I will take mine down to 30# or so, and see how that works. Many different opinions in the Model A world!