[TR] TR6 head studs

Thu Sep 6 14:12:57 MDT 2018

Here it is in black and white (and some blue on the cover) from an old Triumph Unipart (not some independent parts vendor) TR6 parts catalogue I have:
First picture for “TR6 carb” shows 2 right front head studs with part number 156272 and 12 studs with part number 157231 
2nd picture for “TR6 PI” shows 14 head studs with part number 157231
3rd picture is cover of the parts catalogue.

Every CF prefix TR6 engine you see will have 2 right front head studs longer than the other 12 - unless the engine has been rebuilt with different head studs. 
Except for the 8 years I spent in PA, and the 4 years I spent in the mountains on the western edge of VA, I have lived in hot south eastern states all my life - I’ve seen dozens of TR6s with AC and, with 1 exception, they have all been fitted with the same AC kit and all those kits have had a York compressor mounted on a heavy bracket mounted on those 2 longer front right head studs.
(The one slightly different kit was on a new TR6 in a dealer showroom in the summer of 1977 - presumably they’d run out of the other kits by then - but it still had a compressor on a bracket on those 2 studs)

Cheers,
Jack Mc

Sent from my iPad

> On Sep 6, 2018, at 7:14 AM, John Macartney <john.macartney at ukpips.org.uk> wrote:
> 
> At the risk of a long post, in my time at Standard-Triumph ending in 1973, the factory view of air-conditioning was fairly negative and went mostly along the lines of, “if you want to be a bit cooler, wind down the windows. Only pansies want A/C”.
> Moreover, the aircon units available in the UK at the time for factory fit were either of UK or German manufacture and imposed a massive load on the engine to drive the compressor – and they also took up an enormous amount of space with belts going everywhere!!!
> On one occasion, I sold a Herald 1200 saloon to a UK diplomat on his first posting to our Embassy in Kabul, Afghanistan and this location was usually the first for any aspiring First Secretary or wannabe Ambassador. I tactfully tried to persuade the customer to try to do without it citing the likely power loss but he was not to be dissuaded.
> The car was built including the spec for that market of tropical radiator and fan, no heater, low compression engine (7:1) for the low octane fuel with matching distributor, heavy duty suspension, engine skid plate and 5.60 section tyres in place of the 5.20’s for other markets. Prior to delivery, the customer asked me to undertake the car break-in process for the first 1,000 miles so he could take delivery after the first service. I did this for him and kept it for a few days afterwards. On the day I delivered it to him at his home near London, I used the M4 motorway to reach his place in the country and discovered the car could cruise happily at 60-70mph with nary a problem – apart from the usual tooth filling shake-outs from the rigid suspension.
> Then I turned on the aircon.
> Flat out with the aircon running and a *cooler* breeze coming into the body itself, there was no way I could get more than 40mph out of it. Switch it off, and the speedo needle shot round the dial to 70mph plus.
> Because of that, aircon in the 60’s and early 70’s was a dirty word at the factory and I greatly doubt that Production or Engineering fitted longer mounting studs for North American applications, the philosophy being “if it’s good enough for the UK, it’s good enough for the rest of the world”.
>  
> Jonmac
>  
> From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Randy and Valerie DeRuiter
> Sent: 05 September 2018 15:52
> To: triumph list <triumphs at autox.team.net>; EDWARD WOODS <fogbro1 at comcast.net>
> Subject: Re: [TR] TR6 head studs
>  
> Ed-
> 
>  
> 
>  
> 
> Wild guess, but US market cars with the dealer installed a/c unit used the two front stud locations.  Maybe there was some factory coordination going on there?  Or maybe they just had a few longer studs sitting around in the parts bin!
> 
>  
> 
> Cheers
> 
> Randy
> 
>  
> 
> From: Triumphs <triumphs-bounces at autox.team.net> on behalf of EDWARD WOODS <fogbro1 at comcast.net>
> Sent: Tuesday, September 4, 2018 5:41 PM
> To: triumph list
> Subject: [TR] TR6 head studs
>  
> List,
> 
>  
> 
> Anyone know why 2 two of the TR6 head studs are longer than the other 12?
> 
>  
> 
> Ed Woods
> 
> 
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