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| Re-tension new head gasket after a few hundred km - yes/no? http://auszookers.com/forum/viewtopic.php?f=37&t=50746 |
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| Author: | Reubs [ Fri Aug 07, 2015 1:50 pm ] |
| Post subject: | Re-tension new head gasket after a few hundred km - yes/no? |
I have replaced a head gasket on a G13 Sierra a few weeks back. It has done 800km since. I am thinking about re-tensioning the head in work's carpark this afternoon before the drive home. Noob question, actually 2. Is it recommended to re-tension a new head gasket after several hundred kms? I have always had this done but a few people I have spoken to have said it won't hurt but isn't necessary. If so, is it OK to do this after the engine has only cooled for about 3 hours so isn't hot but isn't cold either. |
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| Author: | jdk81 [ Fri Aug 07, 2015 2:30 pm ] |
| Post subject: | Re: Re-tension new head gasket after a few hundred km - yes/ |
As far as I know, there is some head gaskets which only require setting up to the correct torque once (I believe brand is mentioned on the forum somewhere), I believe others do require a second. I know the ones I have all bought and used, all require a re-torque. The car can splutter and cough a little, and use a little coolant, but when re-torqued its much better. I've used about 10 head gaskets on various builds g13a, g13bb, g16b, g16a and all benefit from the re-torque, probably because I buy the cheapest VRS I can, after having no luck with suziworld supplied ones. Edit: links viewtopic.php?f=5&t=21476&hilit=head+gasket viewtopic.php?f=5&t=31406&p=575755&hilit=headgasket#p575755 |
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| Author: | Reubs [ Fri Aug 07, 2015 3:01 pm ] |
| Post subject: | Re: Re-tension new head gasket after a few hundred km - yes/ |
Thanks for the reply jdk81. I'm not using an ACL gasket set - I too just bought a cheap VRS kit off the usual ebay seller. Does anyone have any thoughts on slightly warm versus cold re-tensioning? |
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| Author: | Reubs [ Fri Aug 07, 2015 5:42 pm ] |
| Post subject: | Re: Re-tension new head gasket after a few hundred km - yes/ |
Done. Also my theatrical display in the work carpark generated some interest in the car which is for sale! I did the initial tensioning to about 65Nm. This time I went to 68Nm. Range is 63-70Nm. All bolts except 1 needed a tighten and turned about 90deg. |
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| Author: | shandy92 [ Tue Sep 01, 2015 8:58 pm ] |
| Post subject: | Re: Re-tension new head gasket after a few hundred km - yes/ |
I no its a bit late now but did u loosen the bolts 1/2 a turn, then torque? Or just check them? |
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| Author: | Reubs [ Wed Sep 02, 2015 12:28 pm ] |
| Post subject: | Re: Re-tension new head gasket after a few hundred km - yes/ |
No loosening - pretty sure that wouldn't be wise either. Tightened straight up. |
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| Author: | shandy92 [ Wed Sep 02, 2015 1:47 pm ] |
| Post subject: | Re: Re-tension new head gasket after a few hundred km - yes/ |
That method doesnt really work as efficiently, there is a breakaway torque which hold the bolt in place. That torque might be enough to click the torque wrench before the bolt torque is redone. I would always loosen then redo, even mark with a pen and see where it finishes, then you can see if the final torque has changed. |
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