80 series cruiser - what about the bearing bolts?

[bullerdeano]

Hey, further to my other two posts about doing the big end bearings on an 80 series cruiser.
Firstly, thanks for ALL replys so far, they are appreciated greatly.
Finally getting this sorted. Got a good mechanic to help me with work. Located a set of ACL bearings and a tube of 3 part gasket goo. ready to go until I saw a post that mentioned the end cap bolts. the guy who I am ordering the other parts through said that he also thinks they are what they call 'stretch' bolts that are a one use only type. But he wasn't sure.
Can anyone help me on this? Do I need to buy a new set of end cap bolts to do this job? He also said they are only available as genuine Toyota parts (probably worth the value of the entire truck)

[Crash bandicoot]

yeah, " stretch bolts" or torque to yeld are made with a soft area in the shank that acts like a spring keeping the end cap under tension....If the bolt was completely high tensile it would work its way loose eventually or snap if done up too tight, that's why 8.8 grade bolts are usually accompanied by spring washers as they are completely high tensile..and shear easily once they exceed there load limit.

Torque to yeld means that its is done up tight then torqued to a certain measurement.

you can use torque to yeld bolts again however it is not recomended.

When a manufacture specifies a degree of turn ( i.e) torque to 86 pnd then turn 90 degrees)when using there bolts they are a throw away bolt as they have stretched and will not return to there specified limits when used a second time.

When it come's to yota's the torque measurement of "FT" has never failed yet.

[crazyclark31]

yep you do need to get new cap bolts. dad just did his and think they were $26 each retail . try and haggle them down a bit. we can normally get them down to trade price

[zephyrheaven]

I replaced mine, I read too many 80 series bearing threads from OZ ha ha - a set was like $400 from Toyota, yikes. Have heard of people re-using them but never seen what kind of mileage they did afterward

[Diorama]

Just had a look at my manual and there is a minimum diameter that the bolts must be. When they are torqued up the bolt stretches and it reduces in diameter. This must be measured and if under spec then they must be replaced. For the big ends the standard diameter is 8.30-8.40mm and the minimum shaft diameter is 7.95mm. I reused mine when I did the big ends and have done 50000ks since.