Hilux MK6 Chassis and Rear Tub

[Jelly_Sheffield]

Looks like you've torque wrench might be the same as my old one!
Lucky escape there!
Thread 'Torque wrench failure.' https://www.mig-welding.co.uk/forum/threads/torque-wrench-failure.139218/

Based on this photo I am wondering if there was some dirt or other debris trapped in the joint when it was nipped up.

That would have held the two parts apart (allowing corrosion on the face circled in red), whilst allowing the bolt to be correctly torqued (meaning the face circled in green remained clean).

When whatever debris was in there finally collapsed due to the stress, the bolt was suddenly no longer correctly torqued and rapidly worked loose.

 

[Jelly_Sheffield]

Bought 4 new pinch bolts from Toyota though, as if I'm doing one, I'm doing all of them, those will arrive Monday at the earliest.

The man running the parts desk at my local dealership recognised my name, did a ring round and managed to get me them shipped from another dealer in the group for tomorrow.

 

[dobbslc]

View attachment 471230
Based on this photo I am wondering if there was some dirt or other debris trapped in the joint when it was nipped up.

That would have held the two parts apart (allowing corrosion on the face circled in red), whilst allowing the bolt to be correctly torqued (meaning the face circled in green remained clean).

When whatever debris was in there finally collapsed due to the stress, the bolt was suddenly no longer correctly torqued and rapidly worked loose.

Something like that is always possible but it might be worth checking the torque wrench, mine was so far off it was ridiculous!

 

[Jelly_Sheffield]

Something like that is always possible but it might be worth checking the torque wrench, mine was so far off it was ridiculous!

I will do, when I reinstall the bolts I'll torque it with the 30-150 I used last time, then check it with the new 50-300 I bought last month.

I am not having the bloody thing fall off again.

 

[Robotstar5]

I will do, when I reinstall the bolts I'll torque it with the 30-150 I used last time, then check it with the new 50-300 I bought last month.

I am not having the bloody thing fall off again.

A dab of weld on the nut then....

 

[arther dailey]

I will do, when I reinstall the bolts I'll torque it with the 30-150 I used last time, then check it with the new 50-300 I bought last month.

I am not having the bloody thing fall off again.

stuff like that I normally torque then check and tighten with a 3/4" T bar with short scaff tube assister ,coupled down to half inch drive and know its proper tight. belt n braces.

 

[Jelly_Sheffield]

stuff like that I normally torque then check and tighten with a 3/4" T bar with short scaff tube assister ,coupled down to half inch drive and know its proper tight. belt n braces.

It's actually only 140 Nm, there's a warning in the service manual that if you over-do it you'll strip the (ridiculously fine) threads in the steering knuckle.

 

[Jelly_Sheffield]

A dab of weld on the nut then....

I was going to use Threadlock... But I guess just a tack would be semi-removable.

 

[8ob]

I was going to use Threadlock... But I guess just a tack would be semi-removable.

I reckon you missed that one, its easy done. I have never seen anything like that undo/fall out of its own accord. I am quite often putting stuff together then waiting for bits/delayed. On things like this I use a dab of typex on everything that's done up, takes the doubt out of it on ongoing projects.

Bob

 

[CEJM]

If you need any original parts try Yoshi Parts or Amayama trading. Based in the UAE and Japan. OEM parts at good prices. I have used them for my Patrol. Parts from the dealer were prohibitively expensive and very affordable using the above. Delivery is not always the quickest but I can recommend them for a Japanese car.

By the way, I have no affiliation to them. Just a satisfied customer. Hopefully they can provide the same service for my Mitsubishi Shogun now my Patrol has gone up in flames.