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Harry Ferguson Tractors Discussion Forum
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torque spec.

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J. Stonehouse

08-07-2007 10:08:49




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Could someone give me the torque for the intake/exhaust manifold for a 1952 tea 20 Fergy.




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J.Stonehouse

08-08-2007 05:10:29




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 Re: torque spec. in reply to J. Stonehouse, 08-07-2007 10:08:49  
Thanks for the info fellow tractor handlers, and don't get me wrong I�m aware of how to assemble machinery and how common sense prevails. I am an aviation propulsion technician with the Canadian armed forces, and through my experience with torques, in my mind l feel it�s quite critical when dealing with high metal expansion contraction areas of any power plant. Thanks again guys�s and keep your stick on the ice.

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gshadel

08-08-2007 08:05:12




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 Re: torque spec. in reply to J.Stonehouse, 08-08-2007 05:10:29  
Stone.... There are no dumb questions here, when in doubt on torques, just use the standard machine torque charts that are based on thead count & diameter... that you are probably familiar with already. Those manifold torques were not in my manual, that's what I did, I think it was probably ~20 foot pounds or so based on stud diam./thread. No problems. I do recommend re-torquing after you run the engine up to temp. and let cool back down. I always use a torque wrench on studs... I tend to get heavy handed, and don't want to snap any of those studs off in the block.

George

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LenND

08-07-2007 15:01:53




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 Re: torque spec. in reply to J. Stonehouse, 08-07-2007 10:08:49  
I agree with Gerard the mechanics then had a feel for that. I had a friend who rebuilt car carbs for Ford dealer during WW2 and he could rebuilt a carb and never used a gauge of any kind and they worked like new. All done by feel and eyeing the adjustments.



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John (UK)

08-07-2007 12:06:40




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 Re: torque spec. in reply to J. Stonehouse, 08-07-2007 10:08:49  
22 - 24lbs ft. is the setting you require. Do be careful with them as they will break quite easily if they are rusted up, soak them in penetrating oil and don't try to unscrew them in one go, unscrew them a little bit and then tighten them a bit and keep increasing the movement until it is free. The studs in the flange where the exhaust attaches are particularly hard to get off due to the heat...John

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gerard

08-07-2007 11:35:31




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 Re: torque spec. in reply to J. Stonehouse, 08-07-2007 10:08:49  
No disrespect, but I"m amazed at the times people ask for torque specs. When mechanics worked on these types of engine 40 yrs ago, they didn"t use torque wrenches except for big ends & mains. Even head bolts were usually "tight". I recall some of those old workshop manuals - "nip up" "tight" "very tight" etc - no ft/lbs figures. I have to say, having worked all my life on engines - tractor, truck, marine, some fancy sports cars, race car & bikes, including a couple of my own design, the next time I put a torque wrench on a manifold nut will be the first. Whatever happened to having a "feel" for a bolt or nut? For the manifold of a TEA - 5/16" studs if I recall correctly - about as tight as you could get them by hand if you were using a 4" long spanner (wrench).

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Baronvonstueben

08-07-2007 17:15:29




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 Re: torque spec. in reply to gerard, 08-07-2007 11:35:31  
Some of us do not have your fine motor skills!

I have had trigger finger surgery on my hands from overworking the tendons. Additionally, as a long time weight lifter, when it "feels" tight I have already snapped the stud or bolt.



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Bob (Aust)

08-08-2007 03:50:00




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 Re: torque spec. in reply to Baronvonstueben, 08-07-2007 17:15:29  
Use great care and plenty of penetrating oil when removing and a torque wrench and anti seize when reinstalling. I broke the rear stud in the head on my TEA20 and had to drill and re-tap.

The studs are 3/8 inch, UNF thread one end; UNC thread the other. I really think they are a bit light for the job.



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GrampaJack

08-08-2007 04:50:09




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 Re: torque spec. in reply to Bob (Aust), 08-08-2007 03:50:00  
In response to the question �how tight should that bolt be?� my Daddy always said �stop tightening a quarter turn before it breaks�. I miss my Daddy. Best Regards, Jack



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