[man16v]

iv got an eg5 92 si and just put in a rebult engine in and am having problems with my crank bolt snapping all the time after doing about 1000km with it in...its happened three times now what could be the problem???

 

[Dweezil]

not torquing it enough, or to much would be my first guess

 

[modsHXcivi]

not torquing it enough, or to much would be my first guess

I agree :bravo:

 

[TREBLE]

are you useing a torque wrench?

 

[areskzc]

Check the bolt thread, it may be worn. A fresh new bolt may benefit you.

A little drop of BLUE threadlock may help ( I said BLUE, not red! and just a drop!)

You should torque it with a torque wrench, according to Haynes manual, torque is set to 130

 

[Hellhatch]

Check the bolt thread, it may be worn. A fresh new bolt may benefit you.

A little drop of BLUE threadlock may help ( I said BLUE, not red! and just a drop!)

You should torque it with a torque wrench, according to Haynes manual, torque is set to 130

X2

 

[91HB-D15b2]

i have NEVER torqued that bolt down...ive always broke it loose with a breaker bar and 3 feet of pipe, and run it back on with my craftsman 1/2 inch impact...never had a problem

 

[sloK]

i have NEVER torqued that bolt down...ive always broke it loose with a breaker bar and 3 feet of pipe, and run it back on with my craftsman 1/2 inch impact...never had a problem

thats basicly how they do it at honda... ask a lot of the guys that work at a honda dealership about torque specs on things and they will tell u "i just use the impact."

 

[areskzc]

the torque wrench is more precise and ideal (and cheaper) for ppl who don't have an impact tool

 

[man16v]

thanks for your help but i have used a tourqe wrench set to 130 as the manual said and that bolt broke and then did it again at 120 and that bolt snaped and then i rang honda and got them to send me intalation intructions and a brend new bolt as well, the manual said,
Firt tighten bolt to 145ft pnds and then run engine for 10 mins then take bolt out and refit to 90ft pnds and then 90 dagrees then run engine for another 2-3 mins then tighten a further 60 dagrees from the 90... and then you are done.... BUT it Still snaped...

 

[hybridx]

old school .. you gotta have the right torque technique .. don't torque all at once. Do it by hand, about 1/2 torque the 1st time then up to spec.

Hell, my dad insists, assemble then dismantle & do it all again!

maybe your crank isn't balanced correctly?