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Haynes error - HDi Headbolt torque error
#1
This is very important information for anybody thinking of doing a headgasket on the hdi engine, particularly if using Haynes as a guide:

Haynes specifies the 3-stage tightening for the headbolts as follows - 20nm, 60nm, 270*. The last figure SHOULD be 2 x 110*, NOT 270*. The other two figures are correct.

Could a mod sticky this please.
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



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#2
Genius.

Another brilliant positive for Haynes!
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#3
I reckon I did well to get mine through 180 without shearing them tbh. Rofl
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



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#4
Flipping ek
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#5
You can't be the first to use Haynes torques for the headbolts, how has no-one noticed this before!? Confused
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#6
I suspect the error stems from some of the XU engines that do have a 270 degree tightening sequence on the headbolts.

(yes, it's bloody tight and you wince at the loading on the 20+ year old alloy block threads when you're tightening them!)
1990 Peugeot 205 GTi 1.9 // 1991 Peugeot 205 GTi 1.9 16v // 1992 Peugeot 205 GTi 1.9 // 1999 Peugeot 306 HDi Estate
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#7
I wince at any last X degrre of torque required.... I hate doing them!
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#8
Oops, thats what mine are done to. No wonder they were bloody tight.
[Image: sig002_zpscb892e18.jpg]
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#9
Pretty sure XUDs are 20, 60 and then 220 degrees.
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#10
Stuck. Wonder how many people have snapped bolts in the block or taken the threads out before lol
Team Eaton


1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft
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#11
Cheers, Neil.
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



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#12
110 is far too loose for a diesel head, from checking my notes its 40, 60 then 220 degrees and these links back it up, including one from Citroen themselves. 110 will lead to hg failure very quickly! (6 da.Nm is about 45lbs/ft)

http://service.citroen.com/dtt/CDP/donne...2_2005.pdf

http://www.pikit.co.uk/peugeotmt/common%...ances.html

http://petrila.org/repair/2/406d9/info/gb/b1dg0mk3.htm
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#13
Remember they're stretch bolts...

I've always done my bolts to 40, 60, 220* - well, 40, 60, 90*, 90*, 45* (ish).

Although I've had problems lifting the cylinder head, I wouldn't attribute that to them not being tight enough... And they're the same M12x1.25 10.9 grade bolt.

Where did you get the 110* figure from?
(16-05-2016, 10:45 AM)Toms306 Wrote: Oh I don't care about the stripped threads lol, that's easily solved by hammering the bolt in. Wink
Nanstone GTD5 GT17S - XUD9TE
Volvo V50 D5 R-Design SE Sport - Daily cruise wagon.
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#14
Read autodata wrong, fixed.
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



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#15
Lol, the Peugeot service guide says even less than Autodata.
Pre 2 da Nm
1st Tightening 6da Nm
1st and only Angular 180 degrees.
HaynesHeadcrackers.com :-)
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#16
300 degrees on the XUD boom
[Image: 22f2b6b2-758b-4c1c-96fb-6fa9c6059b13_zpsf306b56b.jpg]
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#17
20nm,60nm,220degrees listed on atris.
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#18
Should it be just 220, or 2 x 110?

There seems to be a lot of confusion on this last point.

My haynes says 20nm, 60nm 220 degrees.
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#19
2 x 110 is from autodata. Theoretically, if the bolts are at the point of stretching then it doesn't really matter, 220 in one go will probably be easier tbh. Just make sure you lube the threads first, i forgot lol.
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



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#20
What is the correct tightening torque for the cam shaft pulley as I've seen several come loose on engines that were rebuilt to haynes torques
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#21
I did it in one go but had a problem with the rear far right hand bolt, the socket slipped damaging the head, I'd only done it around 120-150 degrees, I decided to leave it as is so will just have to wait and see if it causes a problem.
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#22
I used to always do my XUD bolts to 270 degrees for good measure haha the bolts are f*cking horrendous and never came out stretched. But as said 220 is what they're supposed to be.
[Image: 22f2b6b2-758b-4c1c-96fb-6fa9c6059b13_zpsf306b56b.jpg]
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#23
hat's that in Lbft? (My wrench numbers)
It goes, it stops (as reqd). Makeup
Hate Housework!
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#24
Degrees, you'll need an angle gauge.
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



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