Need Strap or Chain Wrench

[j_martin]

Re: Need Strap or Chain Wrench

And how would you suggest tightening it?

Full circle, now we're back to the original question.

 

[bruceb58]

Re: Need Strap or Chain Wrench

My point is to do what the "Factory Manual" says to do. Haynes and Clymer manuals are notorious for suggestuing shortcuts that don't work. If the Factory manual says to use a chain or strap wrench so be it but it will probably say to use a holding fixture.

 

[puddle jumper]

Re: Need Strap or Chain Wrench

My point is to do what the "Factory Manual" says to do. Haynes and Clymer manuals are notorious for suggestuing shortcuts that don't work. If the Factory manual says to use a chain or strap wrench so be it but it will probably say to use a holding fixture.

So Bruce what are you going to do when the chain wrench destroys the serpentine belt groves as every thing gets tight? You have never worked in a real shop have you.

 

[coolguy147]

Re: Need Strap or Chain Wrench

Remove the spark plug from the cylinder closest to that end of the crankshaft. bring the piston toward TDC and feed a sufficient length of clean rope into the cylinder to 'lock' the piston from moving past TDC while you loosen/tighten the pully nut/bolt. works best if you have piston on the compression/power stroke transition but intake/exhaust overlap shouldn't be a problem with having the valves open that little bit.

I use that method all the time to hold the crankshaft on small 2/4 stroke engines to remove the flywheels or drive sprockets on chainsaws.

omg! this is genius! this is so much easier than using a screw driver for leverage! well im on my little 10hp outboard except i only torque it to about 45-50foot pounds! my 35hp i have to torque to 65-70 foot pounds! that one i used my friend to hold the flywheel. he was to weak so i had to.

 

[coolguy147]

Re: Need Strap or Chain Wrench

how would you torque 300 foot pounds???

 

[bruceb58]

Re: Need Strap or Chain Wrench

So Bruce what are you going to do when the chain wrench destroys the serpentine belt groves as every thing gets tight? You have never worked in a real shop have you.

Maybe you should read my post again. I said the "Factory Manual" probably says to use a holding fixture. I would never use a chain wrench AND I WOULD DEFINITELY NOT USE AN IMPACT WRENCH!!!!

 

[bruceb58]

Re: Need Strap or Chain Wrench

how would you torque 300 foot pounds???

With a 6 foot pipe going over the Craftsman breaker bar.

Here is an example of a factory manual showing the holding fixture and the torque specs for a crankshaft bolt. This is a Lexus.

The bolt on the engine in question may be less. On other engines I have worked on, I have fabricated my own holding fixture by welding two bars in an "L" and drilled holes for bolts that thread into the crankshaft pulley. I have around 6 of these I have made for various cars I have changed timing belts on.

 

[puddle jumper]

Re: Need Strap or Chain Wrench

Your right tightening is a different story. If you take off the pulleys off the harmonic balancer and bolt a long plate to it and rest it against the frame you then can then torque it down. A manual will show you what it looks like.

The best way to get it off and on is with a impact wrench. Even if you have to take the rad out.

Did you read my reply.

As of using an impact wrench that's my personal way of doing it becouse I have never seen a harmonic balancer bolt come loose that was put on tight with a impact. Most impacts will easily tighten to 300 foot pounds.

If you are using a 6 foot pipe on a braker bar that's quite the torque wrench you are using.

 

[bruceb58]

Re: Need Strap or Chain Wrench

If you are using a 6 foot pipe on a braker bar that's quite the torque wrench you are using.

If you pull on it with 50lbs force it is. Hey, you are talking to an engineer here!