Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

Rats - Head Gasket

 
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Discussion
View previous topic :: View next topic  
Author Message
MaV  



Joined: 17 Dec 2002
Posts: 24
Location: Bucks, UK

PostPosted: Fri Oct 31, 2003 6:17 am    Post subject: Rats - Head Gasket Reply with quote

Oh well, had to happen. Knew something was wrong when it sucked 4 litres of coolant the other day...

Incidentally, cam oiler tube had snapped off after number 3, might explain the mysterious 0.5 - 1 bar drop in oil pressure

Who's a good (cheap!) source for parts in the UK? Usually use Berlyn (excellent) but could do with a second source.

Cheers from the driving seat of the Volvo for now.
_________________
1982 931. 'Nuff said
Back to top
View user's profile Send private message
MaV  



Joined: 17 Dec 2002
Posts: 24
Location: Bucks, UK

PostPosted: Mon Nov 17, 2003 6:26 am    Post subject: Reply with quote

Cool, no material damage to head or block it seems. General clean-up/flush, check head for level and new gaskets should do it.

Phew
_________________
1982 931. 'Nuff said
Back to top
View user's profile Send private message
Lizard  



Joined: 03 Nov 2002
Posts: 9379
Location: Abbotsford BC. Canada

PostPosted: Mon Nov 17, 2003 6:29 am    Post subject: Reply with quote

good to hear
_________________
3 928s,
Back to top
View user's profile Send private message Send e-mail
MaV  



Joined: 17 Dec 2002
Posts: 24
Location: Bucks, UK

PostPosted: Mon Nov 17, 2003 7:21 am    Post subject: Reply with quote

Thanx. Needed some luck along the line!
_________________
1982 931. 'Nuff said
Back to top
View user's profile Send private message
MaV  



Joined: 17 Dec 2002
Posts: 24
Location: Bucks, UK

PostPosted: Mon Nov 17, 2003 7:49 am    Post subject: Reply with quote

As an observation. If your turbo is sound, leave it where it is.
Once the exhaust was out of the way I had easy access to the 3rd turbo/manifold flange bolt with a deep offset closed wrench - 1/8th turn at a time but good enough The J pipe wasn't that big a deal but cost me a 1/2 - 3/8 adapter before they let go at the top!
_________________
1982 931. 'Nuff said
Back to top
View user's profile Send private message
Lizard  



Joined: 03 Nov 2002
Posts: 9379
Location: Abbotsford BC. Canada

PostPosted: Mon Nov 17, 2003 8:12 am    Post subject: Reply with quote

MaV wrote:
As an observation. If your turbo is sound, leave it where it is.
Once the exhaust was out of the way I had easy access to the 3rd turbo/manifold flange bolt with a deep offset closed wrench - 1/8th turn at a time but good enough The J pipe wasn't that big a deal but cost me a 1/2 - 3/8 adapter before they let go at the top!


I have replace the turbo while engine in the car and I didnt find it that difficlut, I came at it from below, but I did remove the oil cooler lines and I was able to break it free with a wrench, once use I used a stubby ratchet and it came off easily
_________________
3 928s,
Back to top
View user's profile Send private message Send e-mail
MaV  



Joined: 17 Dec 2002
Posts: 24
Location: Bucks, UK

PostPosted: Sat Nov 22, 2003 9:15 pm    Post subject: Reply with quote

Read in the Haynes that the 12 point head bolts don't need re-torquing after 1000 miles. Is this correct? And should I replace the head bolts with new? Also, should the final 180 deg. be applied in one go or incrementally?

Cheers
_________________
1982 931. 'Nuff said
Back to top
View user's profile Send private message
wdb  



Joined: 02 Nov 2002
Posts: 2024

PostPosted: Sun Nov 23, 2003 3:50 am    Post subject: Reply with quote

there may be some useful info here

http://www.asashop.org/autoinc/aug2003/techtotech.cfm

Use an accurate torque wrench to tighten standard type head bolts in 3 to 5 incremental steps following the recommended sequence and torque specs for the application. Tightening the bolts down gradually creates an even clamping force on the gasket and reduces head distortion
Back to top
View user's profile Send private message
Paul  



Joined: 02 Nov 2002
Posts: 9306
Location: Southeast Wisconsin

PostPosted: Sun Nov 23, 2003 9:50 am    Post subject: Reply with quote

MaV wrote:
Read in the Haynes that the 12 point head bolts don't need re-torquing after 1000 miles. Is this correct? And should I replace the head bolts with new? Also, should the final 180 deg. be applied in one go or incrementally?

Cheers


If you can get past the cost, the best thing you can do regarding head bolts is to install Raceware studs. No more retorquing!

http://www.raceware-fasteners.com/prod01.htm
Back to top
View user's profile Send private message Send e-mail
MaV  



Joined: 17 Dec 2002
Posts: 24
Location: Bucks, UK

PostPosted: Thu Nov 27, 2003 3:14 am    Post subject: Reply with quote

Thanks for the links Guys. What I really wanted to know is whether the 12 point "stretch" bolts can be reused or if they should be replaced when changing the head gasket - I'm guessing replacement...

Cheers
_________________
1982 931. 'Nuff said
Back to top
View user's profile Send private message
Joes924Racer  



Joined: 03 Nov 2002
Posts: 11965
Location: Oregon, Denver Colorado native!

PostPosted: Thu Nov 27, 2003 4:31 am    Post subject: Reply with quote

No they generally can be reused
as the torque is not that high
that the bolts will be limited
unless you do it a bunch
of times and it fails on you
again...
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
Back to top
View user's profile Send private message Send e-mail Visit poster's website AIM Address
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Discussion All times are GMT + 11 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group