Thought i had joined the broken crank club but NO!

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Originally Posted by DazzaTD5

*yes, just like any half modern engine, its interference. You don't get the power outputs of a modern engine by having 2 feet of clearance between the valves and the pistons.
*both the 2.7 and 3.0 bend valves quite readily.
*I have had in engines that broke the tensioner bolt. The cause generally is a heavy handed monkey and re-using the old bolts.
*The tensioner bolts is one I use genuine, as bolts are hard enough to trace the origin of manufacture.
*yes the bolt should be marked 10.9

*Using a 1/2 drive torque wrench really isnt the tool for the job. a small 3/8 drive mid range pref digital torque wrench is what should be used.

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I take back my comment this is a rare occurrence - sounds like a lot more cases of this bolt failing than I thought.

Thanks for the info Dazza.

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Originally Posted by 101RRS

I am one of those who is following with interest - 2.7, last cam belt change 2017, oil pump and seals provided by Ford (cannot remember if any bolts were provided), belt kit provided by Advanced Factors - all fitted by a good local independent who provided everything else. Now covered 100,000km since.

Garry

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2018 for me. Reputable Indy supplied the “kit” which I believe was genuine.

This was back when I did not pay enough attention to these details other than knowing I needed the pump upgraded and wanted the idler pulleys done at the same time as the timing belt and tensioner.

Also not clear if the genuine kit comes with the bolt or not. Perhaps Dazza can confirm.

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Originally Posted by PerthDisco

On the upside this is a good news story for old TDV6 cranks.

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Would be good to rename this thread as well.

Tensioner bolt failure may become an important topic to be able to search for in future.

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Originally Posted by DiscoDB

2018 for me. Reputable Indy supplied the “kit” which I believe was genuine.

This was back when I did not pay enough attention to these details other than knowing I needed the pump upgraded and wanted the idler pulleys done at the same time as the timing belt and tensioner.

Also not clear if the genuine kit comes with the bolt or not. Perhaps Dazza can confirm.

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I have asked the mods to rename the thread as the words crank and snapped in this section of the forum seem to reduce peoples life by a few years :)

This is exactly how i was at the time.. it was all about upgrading the oil pump.. i remember looking at the original pump and belt and saying it would proberly run for another 7 years

I do remember looking at the new bolt and the low torque setting and thinking how the hell does it keep running for all those kms but not thinking of checking i just fitted the kit supplied..

1 thing i can say for sure is it wasnt from AF as im 100% sure i didnt start using them till i started replacing suspension componets and wheel bearings..

As i said earlier im not going to name whom i think it was as its unfair to them and at the end of the day I did the replacement so its on me that i never was vigu thourough enough to do my research on the bolt.. lesson learnt the hard way..

Will update more as i know it but due to work commitments its going to be a slow process

Cheers Bulletman

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Originally Posted by Bulletman

I have asked the mods to rename the thread as the words crank and snapped in this section of the forum seem to reduce peoples life by a few years :)

This is exactly how i was at the time.. it was all about upgrading the oil pump.. i remember looking at the original pump and belt and saying it would proberly run for another 7 years

I do remember looking at the new bolt and the low torque setting and thinking how the hell does it keep running for all those kms but not thinking of checking i just fitted the kit supplied..

1 thing i can say for sure is it wasnt from AF as im 100% sure i didnt start using them till i started replacing suspension componets and wheel bearings..

As i said earlier im not going to name whom i think it was as its unfair to them and at the end of the day I did the replacement so its on me that i never was vigu thourough enough to do my research on the bolt.. lesson learnt the hard way..

Will update more as i know it but due to work commitments its going to be a slow process

Cheers Bulletman

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Having followed this thread with concern I checked the "Gates Power Grip Kit" I'm about to fit, it comes with a bolt marked "BUFO 10.9" so I guess the bolt is ok. all the best, Nick.

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Originally Posted by DiscoDB

Out of interest - where did you get the grade 10.9 from? I don’t think you will find a grade marking on the original bolts.

The downside of high tensile bolts is they are less ductile.

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Is the spec what AF sell aftermarket but has also been mentioned on LR Time I believe.

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Originally Posted by DiscoDB

Would be good to rename this thread as well.

Tensioner bolt failure may become an important topic to be able to search for in future.

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It’s typically sold separately

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Originally Posted by Pippin

Having followed this thread with concern I checked the "Gates Power Grip Kit" I'm about to fit, it comes with a bolt marked "BUFO 10.9" so I guess the bolt is ok. all the best, Nick.

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I feel like I’d go and buy the bolt from LR and pay through the nose to know it’s not of questionable quality (not suggesting original is great, but ….)

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Originally Posted by DiscoJeffster

I feel like I’d go and buy the bolt from LR and pay through the nose to know it’s not of questionable quality (not suggesting original is great, but ….)

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LR006027

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Originally Posted by DiscoDB

I would be a bit concerned as AF also don’t include genuine bolts. We know they have prior history with selling suspension kits with non-genuine bolts that have failed on installation.

This bolt is subject to a lot of shear force.

This is only the second failure of this type that has been reported on this forum - so does seem to be a rare occurrence.

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and with caliper bolts where their supplied bolts snap when you try do do them up. I stayed away from them when I replaced all the top / bottom arms.