Re-torquing heads

[canucksafari]

you will not fit a crows foot in there, open or closed (closed are not called crows foot anyways). Even Snap-On...

From many years of working with crows feet I know that the crows foot would spread apart before you would reach the required torque for the head bolt.

Take the extra time and remove the rocker shaft assembly and do the job the right way.

Daryl

Kind of a blanket statement, eh? I guess you would know better than Snap-on on what they are called and how much torque they can handle.
- Snap-on tools online catalog.
I can tell you that they won't open up or break on a 2' breaker bar with another 2' of pipe on it.

Whether they will fit in there or not, I can't say. I've not had to do this with on 3B. I just offered it as a possible option.

 

[amaurer]

Kind of a blanket statement, eh? I guess you would know better than Snap-on on what they are called and how much torque they can handle.
- Snap-on tools online catalog.
I can tell you that they won't open up or break on a 2' breaker bar with another 2' of pipe on it.

Whether they will fit in there or not, I can't say. I've not had to do this with on 3B. I just offered it as a possible option.

Snap-on has very sneakily used units of INCH pounds for the torque on the crowsfeet. There is a warning on all the crowsfeet pages that says:

WARNING
Use only moderate force on Crowfoot wrenches.

In 19mm the open-end is rated to 170 in-lb (14 ft-lb)
FCOM19A, Wrench, Metric, Crowfoot, Open End, 19 mm

The 6pt is rated to 525 in-lb (44 ft-lb)
FRHM19, Wrench, Metric, Crowfoot, Flare Nut, 19 mm, 6-Point

And the 12pt doesn't have a rating listed???
ANM19, Wrench, Metric, Crowfoot, Flare Nut, Deep, 19 mm, 12-Point

 

[canucksafari]

Maybe eating humble pie here, as I didn't see the in/lbs. But I used this 17mm crowfoot FCOM17A, Wrench, Metric, Crowfoot, Open End, 17 mm
It worked fine on both bolts, snaping the studs. Total bar length was over 3.5'. Not exactly sure of the torque developed but it had to be well over 150 ftlbs. I had to drill through the shock casing and insert a steel bar to keep the shock from turning, as pipe wrench wasn't holding it.

 

[amaurer]

It worked fine on both bolts, snaping the studs. Total bar length was over 3.5'. Not exactly sure of the torque developed but it had to be well over 150 ftlbs.

Good enough for me.

 

[canucksafari]

Good enough for me.

If I do end up breaking it one day. I won't tell them I have been using it with a breaker bar with another bar on the end.

 

[fjbj40]

Yes, it was a good suggestion/option.

From my experience, installing propellors on Lycoming equiped aircraft with Hartzell props where you have to use crows feet, 3/4", and only torque to 65 ft/lbs they spread and are often useless after 2-3 prop installs.

I have tried many different brands and sometimes the Chinese cheepos last longer. But they are bulky and often don't fit so they defeat the purpose for fitting in those hard spots.


Daryl

Kind of a blanket statement, eh? I guess you would know better than Snap-on on what they are called and how much torque they can handle.
- Snap-on tools online catalog.
I can tell you that they won't open up or break on a 2' breaker bar with another 2' of pipe on it.

Whether they will fit in there or not, I can't say. I've not had to do this with on 3B. I just offered it as a possible option.

 

[gerg]

If you can fit anyhting onto this and tighten it your a better man than me. This is the easy one as the middle ones and the last would be much harder. Makes unbolting 10 rocker arm bolts look pretty nice if you ask me. The stock bolts would sit a little lower and be 6 point, not 12. These are ARPs.

 

[amaurer]

The stock bolts would sit a little lower and be 6 point, not 12. These are ARPs.

Aww, for a second I thought we were seeing an example of the rumored 3B with TTY bolts.