Head bolts

1. Mickswan Saxperience Forum Bum Joined: Apr 2013 Jarrow Posts: 4022 2003 Icelandic Grey 16v VTR 1991 Daihatsu GTti

   #1 31st July 2014, 21:07

   Before I get crucified I did search so:
   
   Quick one, I'm putting the head back on a 16v at the weekend. I know the torque (20nm, then 120 and a further 120) and order the bolts to go in etc.
   
   Only question is in the past when I've done head bolts up I've tightened them up to a certain tourque (say 10, 15 then 20) in stages before doing them up to the final setting so everything goes down evenly.
   
   Anyone do it the way I've said and what tourque settings have you used? Or do I just want to go straight to 20nm then 120 and 120 again.
2. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #2 31st July 2014, 21:14

   just do the 2 stages at 20nm mate
   
   never had a bother even with double gaskets doing it this way.
   
   theyre stretch bolts so getting the correct tension relies on them being torqued at the right amount for the correct angle
   
   keeps it nice and even across the head
3. Mickswan Saxperience Forum Bum Joined: Apr 2013 Jarrow Posts: 4022 2003 Icelandic Grey 16v VTR 1991 Daihatsu GTti

   #3 31st July 2014, 21:20

   So to confirm just to 20nm across all bolts then up to the right angle?
4. Gabbastard Saxperience Post Whore Joined: Dec 2002 United Kingdom Posts: 8390

   #4 31st July 2014, 22:38

   I did them all finger tight, then 20nm, then 260degrees iirc.
5. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #5 31st July 2014, 23:30

   Way i do it
   
   On a 16v.. Run the bolts all in hand tight
   
   On an 8v.. Run the bolts all in untill the rockers have settled flat on the head
   
   Torque them all to 20nm in the correct order
   
   Do your 120 degree, again in order
   
   Leave it 10/20 mins then repeat
   
   Run the car up to temp (till the stat opens) then let it cool down completely
   
   Job done
   
   Some like to run it up to temp between the 2 torque stages but I think that comes from alot of old skool engines
6. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #6 31st July 2014, 23:49

   I do/did it as above minus the waiting 10mins or so.
   At the factory are these heads bolted down by machine all at once though?
   Seen videos of kseries being done that way when they are new, just bosh gasket on and then the nipping up before a full final torquing up all bolts at once