Torq
4 posts
Joined: 29/09/2004 21:44:46
Location: Dublin Ireland (S.)
9 stud head on 11 stud block
Hi Guys, Any reason why I cant fit a 9 stud head on an 11 stud block? Thanks. Torq
Posted: Nov 21, 2004 06:59 PM
Gary
2 posts
Joined: 21/09/2004 07:33:19
Location: LEICESTER United Kingdom (Excluding channel Islands)
Coolant Pressure test after Re-Build- Leaks up Head Studs...
Hi All, Just re-built my Cooper 998 and have done an air pressure test on the coolant system prior to the first run, soaping everything to find the leaks has located air coming up the head stud bolts, is this normal? Im thinking maybe its creeping through the gasket, or the heads fcukd and Im going to kill myself....... Please tell me itll be OK when its been through a few heat cycles.....
Posted: Mar 14, 2005 04:50 PM
Den
14 posts
Joined: 11/09/2005 21:49:40
Location: Loughton United Kingdom (Excluding channel Islands)
Cylinder head 9 & 11 stud
Hi Can anyone tell me can you fit a 11 stud head onto a 9 stud engine without mods. Cheers all
Posted: Feb 24, 2006 08:48 PM
Rob
50 posts
Joined: 01/10/2005 23:57:53
Location: Bridgwater United Kingdom (Excluding channel Islands)
hi there, you should be able to, just obviously the 10th and 11th studs wount be able to be used. not too sure if it would have any side effects on the head gasket, shouldnt have thought so...............
Posted: Feb 25, 2006 04:58 PM
jn1702
Joined: 09/03/2006 09:19:56
Location: stowmarket United Kingdom (Excluding channel Islands)
head studs
my 998 has one stud longer thah the others on the front row the one that the coil bracket sits on it's 4 and 5/8 long where can i get one ? thanks joe
Posted: Jun 02, 2008 07:38 PM
Clive
5 posts
Joined: 16/03/2009 19:22:51
Location: Barnstaple United Kingdom (Excluding channel Islands)
9 or 11 Stud Head
Dear All,
I have a 11 Stud block and have been offered a 12G940, stage 3 head that has 9 studs. I have been told that this can be taken to a mini engineering firm and drilled out for 11 studs is this correct or will it comprimise any of the oil/water ways?
Thankyou in advance.
Clive.
Posted: Mar 18, 2009 08:05 PM
john tandy
1 posts
Joined: 01/06/2008 22:09:38
Location: Dudley United Kingdom (Excluding channel Islands)
Drilling the head for 11 studs
Clive,
As long as the engineering company know what they are doing it won't be a problem.
John
Posted: Mar 19, 2009 01:17 AM
village
6 posts
Joined: 31/10/2008 22:43:46
Location: Ashford United Kingdom (Excluding channel Islands)
not if it is done like this.
Posted: Mar 25, 2009 11:35 PM
john skelton
Joined: 04/04/2006 08:31:46
Location: epsom United Kingdom (Excluding channel Islands)
i,m rebuilding a spare cylinder head and the heater and the thermostat studs could do with being replaced.
from past experience i know that at least one will shear. whats the best way of removing them?
Posted: Jul 29, 2010 01:18 PM
Barry Brown
511 posts
Joined: 23/06/2008 12:08:31
Location: New Barn United Kingdom (Excluding channel Islands)
> head studs
it all depends on how badly corroded into the head they have become.
trick #1 is to build a pocket around the stud with blu- tack or plasticine and then fill it with "Plus Gas" or a similar freeing oil and let it soak for a few days. then put two nuts on the stud, lock them together and try to undo the stud. If it doesn't want to go then apply gentle heat to the point where it enters the head and keep trying it (undo 1/8 turn and then do it up again and keep repeating.
if it snaps then you've got two options.
1 = buy an 'easy out drill bit'. These have a lefthand thread. drill a pilot hole in the stud and screw in the easyout. as you screw it in and it tightens up then it should unscrew the remains of the stud.
2 = drill out the stud. for this you need to know the depth left in the head. centre punch the stud and using a drill that is half the diameter drill to the required depth. then take a drill the same diameter as the stud where the thread is cut deepest and redrill the hole to depth. the you need a dentist pick or very thin metal scribe to pick out the remaining thread.
there is the potential to run a small drillbit down the edge of the thread before trying the easyout but this can lead to problems trying to tighten up the new one.
for accuracy sake - if the old ones snap then give it to an engineering shop to do as they will be able to drill it out absolutely square in a matter of minutes whereas a trusty handheld black & decker may b*gger it up completely.
good luck.
Posted: Jul 29, 2010 01:54 PM
Michael
10 posts
Joined: 27/11/2010 12:29:48
Location: Harrow Weald United Kingdom (Excluding channel Islands)
Studs may not be seized in the Head.
Often it isn't the case that the studs are seized in the head, but more a case that the shank of the stud has got corroded and caught solid in the body of the thermostat housing, so drilling and using a stud extractor may be a totally fruitless exercise, as you'll probably find the other two bolts will be just the same. Even if you do end up shearing off the heads of the other bolts you still won't be able to get the thermostat housing off as it'll be totally jammed tight.
Happpened to mine during a "routine"thermostat change and resulted in me having to literally smash the old thermostat housing to get it off, and replacing the lot for new. Suprisingly the studs (or bolts in my case) came out of the head without any hassle at all once i'd reverted to taking the club hammer to the housing. Fortunately I live 20 mins away from MS, so was able to pop up on my bike and pick up the replacement bits, so no biggie.
Just a warning to you, as if you go for it and find your studs/bolts are totally seized in the housing you might end up with the car off the road for a couple of days waiting for parts to arrive, so consider it before going to crazy with the socket set. Those studs are about as tough as marzipan and sheer off at just the slightest excuse. Plenty of soaked in WD40 if definately the way forwards before attempting anything!
Posted: Dec 14, 2010 04:19 PM
hevray
Joined: 27/12/2005 18:49:40
Location: BRIGHTON United Kingdom (Excluding channel Islands)
a series competition head studs
Hi, do I need to retorque competition head studs once the engine has run, and if so when cold or hot?
Posted: Apr 24, 2018 06:07 PM
Crashnburn1981
158 posts
Joined: 04/12/2004 16:50:02
Location: glastonbury United Kingdom (Excluding channel Islands)
cylinder head
Hi,
You can tell if your head is 9 / 11 stud as the bulk of mini heads are 9 stud, and have i beleive 5 studs along the front of the engine (coil bracket usually mounted on one), and four under the rocker cover (could be four and five respectively), the 11 stud heads have additional studs at either end of the head, I beleive that your block can be drilled to accept a 11 stud head, but then depends where you want to go with it, you may already have 11.
Cheers
Nick
Posted: May 22, 2006 10:51 PM
kdb550
26 posts
Joined: 12/03/2005 21:07:08
Location: Havant United Kingdom (Excluding channel Islands)
Manifold stud thread
Does anyone know what thread the manifold studs are I want to retap my head but obviously want the right thread to tap it with.
Posted: Apr 24, 2006 07:36 PM
pickme
672 posts
Joined: 08/09/2004 23:10:14
Location: Chippenham United Kingdom (Excluding channel Islands)
manifold
Had the same problem with mine. I took me ages to work out how it fitted. Mine fits flat onto the cylinder head and over the first stud on the exaust manifold. I cut this corner off on mine because it means if you want to replace the exhaust gasket, you have to replace all the sandwich plate gaskets too.
Posted: Feb 28, 2006 08:59 AM
Alan
7 posts
Joined: 04/03/2006 06:11:55
Location: Sydney Australia
1293 head
The head should go straight on to your 1275, the only time thre are problems are when you try and put a 1275 head onto a 998/850 block. Just check how may studs your head has got, some race engines will have 11 rather than 9
Posted: Mar 05, 2006 12:03 AM
Kevski style
105 posts
Joined: 12/09/2004 17:59:09
Location: Netherlands
?
I the catsing is 940 thats probably what it is: MG Metro. Cant be certain because I have to see it with my own eyes, but making to extra studs in the block and head can be done....
Posted: May 27, 2005 08:22 AM
nigel
Joined: 29/10/2006 05:35:25
Location: United Kingdom (Excluding channel Islands)
mini cylinder head identification.MOWOG 12g940
hi,i suppose this is a simple question for those in the know.could anyone out there tell me what,MOWOG,signifies on 12g940,cylinder head.this cast into the head,just above the 12g940... just want add that this an ELEVEN stud head..
Posted: Jan 15, 2007 06:08 PM
1948 posts
Joined: 28/05/2006 16:49:46
Location: cambridge United Kingdom (Excluding channel Islands)
Head problem!!
its best to drill it out as it gives more even water flow in the head, but if not u just need the spacer plate with a water take off to go under the alloy water takeoff part on the head and londer bolts or studs depending on whats on ur head already u could prob get that off ebay
Posted: Mar 22, 2007 12:20 AM
Tim
1851 posts
Joined: 18/10/2004 09:40:59
Location: Bournemouth United Kingdom (Excluding channel Islands)
Thermostat bolt sheared off
Soak well in WD40 first - and I mean well - or you may just snap the stud off flush with the head. Then you'll have to use a stud extractor - not much fun!
Posted: Aug 30, 2007 08:36 PM