briggs 5 hp rod bolt torque

[plowboy6602]

i am rebuilding a sotck briggs and stratton 5 hp. i was woundering what the torque(ft./lbs) needs to be on the rod bolts thanks

 

[Bluethunder3320]

Some people like to torque rods, some say it is unessasary.

I would download the manual for your engine by going to the b&s website and type in your model and code #s. That are stamped onto the blower housing usually.

Welcome to the forum, if you have trouble finding the manual give me the stamped on info and ill look.

Good luck!

 

[Russ2251]

Some people like to torque rods, some say it is unessasary.

It is absolutely necessary, unless you want something less than factory spec.
I believe it is 100 inch lbs. but need engine number to be sure.

 

[Russ2251]

If number is 130202 (130000 range), then 100 in. lbs. is correct.
Downloadable manuals do not indicate torque values.
Parts lists and operator manuals only.

 

[plowboy6602]

rod torque

oh thanks i do not have the original blower housing but it is a late 70's early 80's 5 hp so ill go with 100 in pounds. and also what would you recomend for a prefomane 5 hp torque on the rod with an arc billet rod

 

[Russ2251]

Unknown to me. I'm sure someone else will chime in.

 

[Doc Sprocket]

Hope this helps- Quote taken from ARC Racing website, link provided below.

"Rod Bolts: Proper rod bolt torque is VERY important. In order to keep from backing out, it is necessary for a bolt to stretch a specific amount so the threads lock into place. This is a little known or understood requirement for a bolt to do the job it is designed to do. The proper stretch for a bolt is usually achieved by torquing the bolt a calculated amount based on the bolt's design and the characteristics of the application. ARC's rod bolts are custom designed to achieve thread-lock at 170 inch/lbs. This MUST be measured with an accurate inch/lb torque wrench. Failure to properly torque the bolts is a all to common cause of rod failure, second only to the oil clearance issues explained above."

http://arcracing.blogspot.com/1999/07/probable-cause-of-most-rod-failures.html

 

[newrider3]

Some people like to torque rods, some say it is unessasary.

I'm sorry, but this is the worst and most misleading post I've seen, ever.
There is nothing on an engine you should be putting together without a torque wrench, least of all the connecting rods.

 

[devino246]

Bolts should also be torqued 10 in.lbs. at a time, switching back and forth between bolts.

 

[Bluethunder3320]

For something like a rod, im capable of using a regular wrench. If i can find the specs easily, alright, ill torque them. However, once you do it quite a few times, you know whats tight enough and whats too tight.

Simple using a wrench lefty loosey righty tighty thats all.

Im more concerned about headbolts than anything else.

 

[devino246]

For something like a rod, im capable of using a regular wrench. If i can find the specs easily, alright, ill torque them. However, once you do it quite a few times, you know whats tight enough and whats too tight.

Simple using a wrench lefty loosey righty tighty thats all.

Im more concerned about headbolts than anything else.

If a head bolt backs out, whats the worst? no compression and the engine stops. What happens when a rod bolt backs out? You get a hole in your block.

 

[Bluethunder3320]

No i have never had them back out, im talking about breaking a headbolt or unevenly tightening them.

On a rod though you just need to keep them tight enough. If you have never tightened a rod bolt before dont guess. After a while you get a feel for the range.

 

[devino246]

No i have never had them back out, im talking about breaking a headbolt or unevenly tightening them.

On a rod though you just need to keep them tight enough. If you have never tightened a rod bolt before dont guess. After a while you get a feel for the range.

Señor engine specialist?

 

[Bluethunder3320]

Señor engine specialist?

Umm, hardly, but i know enough and done it enough to tighten rod bolts!

 

[Russ2251]

Use a torque wrench as if your life depended on it.

 

[Kaptain Krunch]

For something like a rod, im capable of using a regular wrench. If i can find the specs easily, alright, ill torque them. However, once you do it quite a few times, you know whats tight enough and whats too tight.

Simple using a wrench lefty loosey righty tighty thats all.

Im more concerned about headbolts than anything else.

Keep thinking that haha. Use a torque wrenvh and you wont have to worry about either.

 

[Doc Sprocket]

In my experience, some people think engine oil is unnecessary.
Then, at the side of the highway, they wonder what went wrong.
Blue, perhaps you've been lucky.

Think of the piston and rod as a 5000RPM slide hammer.
Now, let's all go get our torque wrenches.

 

[redsox985]

The real question is "Why not?" What reason is there to NOT use a torque wrench. As TS said, any piece of metal moving at 5000RPM shouldn't be assembled with the though of, "Eeh, that should be ok." I can not see a reason why you wouldn't want to properly assemble them. Not to mention personal injury, but also the cost of the parts. So if it does become a grenade and you walk away lucky, now you're out $$$ that, had you done it right at first, you wouldn't have a hole in your wallet and $#!+ in your pants.

 

[Doc Sprocket]

Could you imagine the fun we'd all have if the automobile, truck, and motorcycle manufacturers said, "Eeh, that should be okay"?

 

[Russ2251]

Do not forget aircraft...can you imagine???