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winabbey
 Post subject: What head is this?
PostPosted: Wed Nov 24, 2010 7:34 pm 
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I understand this is a MK II S cylinder head. Does that look right?

What sort of work has been done to the chambers - minor or significant?

What are the numbers stamped on the end?

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drmini in aust
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PostPosted: Wed Nov 24, 2010 7:51 pm 
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Well it's a 12G940 head casting by the shape, might be a Mk2 S. Valve sizes look about right. Chambers have been cleaned up a little. Inlet ports look cleaned out near the valves.

Does it have 12G1805 stamped near the thermo housing (1/8 letters)?
Not all Mk2Ss did...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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74snail
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PostPosted: Wed Nov 24, 2010 7:57 pm 
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Keith Calver says
" A+ heads generally have three collet grooves in the valves, collets are 14-degree cone taper instead of the 10-degree on single groove collets (so parts are not interchangeable between single and triple groove types) and the top-caps have a raised ridge around the collet hole "

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drmini in aust
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PostPosted: Wed Nov 24, 2010 7:58 pm 
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This is not a A+ head from the pics, it's flat on top all round the thermo housing.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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winabbey
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PostPosted: Wed Nov 24, 2010 8:20 pm 
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drmini in aust wrote:
Does it have 12G1805 stamped near the thermo housing (1/8 letters)?
Not all Mk2Ss did...

No, nothing stamped in that area.

I'm assuming the stamping on the end of the head near the heater outlet was done by whoever worked on it. It appears to have been chemically dipped or blasted to remove all the paint and grime.

I got from eBay user fat850. Is he on here?

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74snail
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PostPosted: Wed Nov 24, 2010 8:24 pm 
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drmini in aust wrote:
This is not a A+ head from the pics, it's flat on top all round the thermo housing.


Obviously I was reading the wrong section the article :)

Did the head stamping change when they started on the GT :?
.

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kiwiinwgtn
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PostPosted: Thu Nov 25, 2010 4:47 pm 
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can you post a pic of the thermo end
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winabbey
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PostPosted: Thu Nov 25, 2010 7:14 pm 
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kiwiinwgtn wrote:
can you post a pic of the thermo end


Like this, or from above?

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kiwiinwgtn
 Post subject:
PostPosted: Thu Nov 25, 2010 7:19 pm 
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from above please
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winabbey
 Post subject:
PostPosted: Thu Nov 25, 2010 8:06 pm 
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kiwiinwgtn
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PostPosted: Thu Nov 25, 2010 8:14 pm 
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It looks like its possibly a Mk2 S / Clubman GT head as the casting indent next to the therom housing is the same as my S engine

Measure the valves that may also help

Hope this helps

Kiwiinwgtn
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winabbey
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PostPosted: Thu Nov 25, 2010 8:15 pm 
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Thanks everyone, much appreciated.

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