In its element... 1k miles since rebuild.

 

Hi AGLR, I have a jaguar XF with the same engine and recently changed timing tensioners. The crank bolt was hard to remove and even worst to tighten the new one, in fact I didn´t rotate it 270 degrees because the chinese tool got rounded, absolutely aliexpress crap:



Did you really reuse the bolt? How did you tighten it, 200Nm + 270 degrees?

 

You shouldn't have reused it as it is a stretch bolt. Did you torque the bolt 200 Nm + 270º ?

Impressive job anyway

 

I did re-use it. I'm sure new is best but I'm happy with my results.

I don't think I got to the full torque spec for similar reasons. Mine didn't actually slip but I was bending my long bar and it was as tight as I was going to reasonably get it.

If you want to go all the way I think a high quality socket and a torque amplifier will get you there.

 

Hey folks, I couldn’t read through all the comments so I don’t know if this was mentioned before. But the actual head bolt socket you need would be a TP60 (Torx Plus) socket. Don’t mess around trying to loosely fit hex bits, or hammering in regular torx T60 sockets. Get the TP60 , the style is called TORX PLUS. Hope this helps !

 

The socket you should use for the head bolts is TP60. The style is called Torx Plus. Don’t waste time hammering in a regular T60 torx or trying to fit a hex bit.

 

yuckbarry,

Do you have actual experience with this tool on a LR4 head bolt? I think this needs to be clarified for anyone looking for this info in the future. A current rebuild on another forum states that the TP60 DID NOT fit.

 

sorry about that misinformation. It did not fit!! I was pissed lol. I tried to delete the comment but I guess it needed to get approved before it posted.

what worked out in the end was a harbor freight t60 from the half inch set. And what I did was took it to a bench grinder and ever so slightly grinder off each star pointed part to be more square. The t60 from harbor freight half inch torx socket set fit perfect diameter wise but I had to hammer the bit into the bolt head . So squaring off the star points helped the bit fit the head bolt way better.
don’t get the TP60 lol. Just get the 1/2” torx socket set at harbor freight and square off the star points to resemble the tp60. Worked fine for me.

 

Update:
15k miles since rebuild and still running strong.

 

This is an exceptional thread. Inspiring, in fact. Intelligent, articulate, methodical approach to a complex task. I have a Lancia Montecarlo in my shed waiting for my attention, and thanks to your example my approach will be calm and careful rather than my all too usual haste and corner cutting. My Discovery 4 - that's what we call LR4's in Australia and elsewhere - needs nothing at present..\

So..just letting you know about a far off contribution you've made.