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Aussie GT Engine
https://ausmini.com/forums/viewtopic.php?f=2&t=98893		 Page 1 of 4
Author:  Chris.Williams [ Mon Jul 29, 2019 3:47 pm ]
Post subject:  Aussie GT Engine
Hi all,

What can anyone tell me about a motor I picked up, has 1206 stamped into the engine tag spot, which I know means GT motor, it has a cooper S gearbox under it. Are they a sort after thing for people rebuilding their gt’s or not really?
Cheers
Chris
Author:  simon k [ Mon Jul 29, 2019 4:13 pm ]
Post subject:  Re: Aussie GT Engine
yes - very sought after... does it have tappet chest cover side plates?
Author:  TK [ Mon Jul 29, 2019 5:25 pm ]
Post subject:  Re: Aussie GT Engine
1206 Is an 1100S type block
Author:  Chris.Williams [ Mon Jul 29, 2019 6:47 pm ]
Post subject:  Re: Aussie GT Engine
simon k wrote:
yes - very sought after... does it have tappet chest cover side plates?

No side plates
Author:  Chris.Williams [ Mon Jul 29, 2019 6:50 pm ]
Post subject:  Re: Aussie GT Engine
Found this on the classic register

Prefix 4: 1206 - This prefix was introduced to the GT in late 1972. Unlike the engines outlined above, this block had a solid rear wall among other features, and was closer to the 1275GT model offered in the UK and some other markets.

1206 and 1207 prefixed engines

Block rear wall: These engines were rationalised large journal blocks, with a solid rear block wall (same spec as UK 1275GT).
Crankshaft: The crankshafts in these later engines were not cross-drilled, and had larger big ends (1.75 inch compared to 1.625 inch). These cranks are stamped with part number 12G1817, and were also tuftrided, using the EN16T steel. These engines naturally also had different main bearing caps to the earlier GT engines.
Crank case ventilation: Unlike the earlier Cooper S related engines, these engine blocks have 2 CCV points located in different positions to the earlier engines. One is located on the timing chain cover plate, and the other sits on the top of the clutch housing. These were fed directly to the carbies via a plastic 4-way adaptor.
Additional engine mount: An additional engine mount was fitted to these engines from the thermostat housing to the bulkhead, into a bracket next to the windscreen wiper motor. This was in addition to the mount running from the bulkhead under the brake/clutch master cylinder, which was also present on the earlier engines.
Author:  Chris.Williams [ Mon Jul 29, 2019 6:59 pm ]
Post subject:  Re: Aussie GT Engine
Chris.Williams wrote:
simon k wrote:
yes - very sought after... does it have tappet chest cover side plates?

No side plates

Still sort after?
Author:  Goldbrocade_62 [ Mon Jul 29, 2019 7:04 pm ]
Post subject:  Re: Aussie GT Engine
Chris.Williams wrote:
Chris.Williams wrote:
simon k wrote:
yes - very sought after... does it have tappet chest cover side plates?

No side plates

Still sort after?

Still sort over
Author:  gtogreen1969 [ Mon Jul 29, 2019 7:08 pm ]
Post subject:  Re: Aussie GT Engine
Probably a bigger market for the 1206 in NZ because they got most of the later GTs.
Author:  AEG163job [ Tue Jul 30, 2019 2:02 pm ]
Post subject:  Re: Aussie GT Engine
Sought after, not sort. Just saying.......
Author:  winabbey [ Tue Jul 30, 2019 2:43 pm ]
Post subject:  Re: Aussie GT Engine
AEG163job wrote:
Sought after, not sort. Just saying.......

Ha ha. As a senior citizen brought up on the need for correct grammar I thought the same thing, but resisted saying anything. It seems it's quite acceptable these days to misspell, abbreviate or use "text speak" when communicating, and that's OK on here. Apart from anything else our members come from very different backgrounds. If the meaning of a post can be understood that's fine.

One that does grate a bit with me is when I see a new part is brought for the car (instead of bought).

OK, enough of the grammar police intervention ... :)
Author:  Bill B [ Tue Jul 30, 2019 3:33 pm ]
Post subject:  Re: Aussie GT Engine
If only a few people wanted these engines, would they then be sort of sought after?
Author:  TK [ Tue Jul 30, 2019 5:26 pm ]
Post subject:  Re: Aussie GT Engine
Probably not as you can re-stamp any old 1100S thick flange block
Author:  cooperess [ Tue Jul 30, 2019 5:49 pm ]
Post subject:  Re: Aussie GT Engine
Bill B wrote:
If only a few people wanted these engines, would they then be sort of sought after?

English is a tricky language.
Author:  9YaTaH [ Tue Jul 30, 2019 7:12 pm ]
Post subject:  Re: Aussie GT Engine
simon k wrote:
yes - very sought after... does it have tappet chest cover side plates?


and are they glued on to a solid block :?: :roll:
Author:  AEG163job [ Tue Jul 30, 2019 7:18 pm ]
Post subject:  Re: Aussie GT Engine
winabbey wrote:
AEG163job wrote:
Sought after, not sort. Just saying.......

Apart from anything else our members come from very different backgrounds. If the meaning of a post can be understood that's fine.


Point taken. I'll try to be less pedantic in future.
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