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+--- Thread: XUD9 head bolt tightening sequence and torques (/showthread.php?tid=2857)
XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
As the title says really, anybody got a Haynes they can take a photo of or copy the info onto here for me? Tried searching google and pug306 (why did I even bother?!
) but found nothing....At a guess for the tightening sequence, id say its something like....
9 3 1 6 8
7 5 2 4 10
So pretty much working from the middle out, and go diagonally from left to right and right to left, correct?
Thanks, Dan.
Re: XUD9 head bolt tightening sequence and torques - Ruan - 18-04-2012
The torques go as so:
Pre-Tighten to 20 NM. Tighten a further 60 NM. Tighten a further 220°
That order is pretty much there, it's not 10000% imperitive on the order, as long as you don't do all the back ones, then all the front ones, or similar, it'd be fine...
EDIT:
It's:
8 4 1 5 9
7 3 2 6 10
Imagine it in a spiral outwards...
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
Cheers Ruan.
Just found an answer on wiki answers, obviously cant take that as 100% true but it says
10 6 2 3 7
09 5 1 4 8
Which isnt far off what I meant, just that goes clockwise, working outwards.
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
Oh and potential silly question here....
Is it worth putting an additional 20° or so on each bolt considering the head will be up against probably double standard boost and generally higher cylinder pressures, or not?
XUD9 head bolt tightening sequence and torques - Jake - 18-04-2012
This is what I had :
Order-
8. 4. 1. 5. 9
7. 3. 2. 6. 10
Torque-
Stage one- 20Nm/15lbf ft
Stage two- 60Nm/44lbf ft
Stage three- Tighten 180 degrees
Re: XUD9 head bolt tightening sequence and torques - mark_airey - 18-04-2012
Toxic-Jake Wrote:This is what I had :
Order-
8. 4. 1. 5. 9
7. 3. 2. 6. 10
Torque-
Stage one- 20Nm/15lbf ft
Stage two- 60Nm/44lbf ft
Stage three- Tighten 180 degrees
That's pretty much what Ruan said
^^ but as Ruan said, last stage should be 220* (and a bit, just make sure they are all the same)And again, it doesn't really matter on the specific order of tightening as long as you start in the middle and sprial out as both Ruans and Dans second one do
Re: XUD9 head bolt tightening sequence and torques - Ruan - 18-04-2012
Won't do anything... The bolts are stretching with that final 220*, you won't get any more clamping force, you'll just stretch them to more plastic deformation... Leave them, if they give problems, then give it another 90*... That's what I've done...
Re: XUD9 head bolt tightening sequence and torques - Mattcheese31 - 18-04-2012
both the same . . . . . .
apart from your first guess Dan which is toss . .
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
Righto, cheers all!
The head is currently on the engine but none of the bolts are tight yet because we ran out of sunshine last night. Tonights job is to get them all tightened and then crack on with putting the rest of it back together! :o
Re: XUD9 head bolt tightening sequence and torques - Ruan - 18-04-2012
Good lad.
Was the head OK in the end, I haven't read the thread...
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
Yeah it seems fine. Precups on cylinders 2 and 3 still have tiny cracks in them but it pressure tested fine!
Re: XUD9 head bolt tightening sequence and torques - darrenjlobb - 18-04-2012
As Ruan said, Leave plenty of stretch left in the bolts for when you end up stretching the cocks in situe!
Re: XUD9 head bolt tightening sequence and torques - Dave - 18-04-2012
50 used spare bolts, bang them all down with breaker, job done. If it yields swap out replace with non-f*cked bolt...
All seriousness, ^ what everyone else has said...
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
I wouldnt expect anything less from you Dave
Re: XUD9 head bolt tightening sequence and torques - Dave - 18-04-2012
I have done mine like that before... and it has been fine
Re: XUD9 head bolt tightening sequence and torques - mark_airey - 18-04-2012
Dave Wrote:I have done mine like that before... and it has been fine
Ruan called me a Pikey for re-using head bolts
Mine has also been fine.........
Re: XUD9 head bolt tightening sequence and torques - Ruan - 18-04-2012
Says the guy who is a paid up member of Team Orange Engine Bay
xx
It's pretty pikey for the sake of £12 for a set of bolts... The ballache involved if it's too stretched and you only realise when you've shagged the gasket is not worth £12 IMO.
Re: XUD9 head bolt tightening sequence and torques - ginge191 - 18-04-2012
Fingertight
/closethread
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
Quick question while were all here talking about it........
If some uprated headbolts were to become available in a few weeks/months time, would it be possible to replace the current ones if you removed and replaced the bolts one at a time?
Re: XUD9 head bolt tightening sequence and torques - mark_airey - 18-04-2012
Ruan Wrote:Says the guy who is a paid up member of Team Orange Engine Bay
xx
It's pretty pikey for the sake of £12 for a set of bolts... The ballache involved if it's too stretched and you only realise when you've shagged the gasket is not worth £12 IMO.
Shhhhh...............it seems to be OK for now
Dan! Wrote:Quick question while were all here talking about it........
If some uprated headbolts were to become available in a few weeks/months time, would it be possible to replace the current ones if you removed and replaced the bolts one at a time?
not really no, you would have to do the gasket again really!
Re: XUD9 head bolt tightening sequence and torques - Dan! - 18-04-2012
Mmm, thought as much. PITA.
I just got the idea from people replacing split rim bolts one at a time to save having to completely strip/re-build the wheel.
Re: XUD9 head bolt tightening sequence and torques - Ruan - 18-04-2012
Nah, it's fine, replace them one at a time and it's no problem, long as you do it up correctly again, it'll be fine...
I've replaced the bolts on their own in mine from when I've stretched them too much, once you put in new ones it's fine again...
Re: XUD9 head bolt tightening sequence and torques - Dave - 18-04-2012
You can always tell when you've overtightened a bolt, and i've overtightened many headbolts before... I probably scrap 3 or 4 off when tightening down just to get it on the edge... but they are all used so who gives a f*ck, and then never have an issue after that.