[Fot] TR6 cylinderheads

[van.mulders.marcel at telenet.be]

Phill, 
Mordy Dunst made the plain copper gaskets for me, together with steel O-rings. I asked him to NOT make the coolant passages in the gaskets. That's the reason why it took so long to notice that my cylinderhead has fewer passages! 
I think I'm going to drill the missing holes in the cylinderhead (and in the gasket!). 
Teri Ann, 
I would have to drill from beneath toward the water passage in the bottom left of your picture : it seems not to be very delicate. Probably the casting is the same for earlier and later cylinderheads, only the drillings and machining are different? 
The holes I have to drill are in line with the holes for the studs and the TR6 cyl head is similar with the picture. 
Marcel 


Van: "Phil Gott" <vfracing at aol.com> 
Aan: "TeriAnn J. Wakeman" <tjwakeman at gmail.com> 
Cc: "van mulders marcel" <van.mulders.marcel at telenet.be>, "fot" <fot at autox.team.net> 
Verzonden: Zaterdag 30 november 2019 18:54:39 
Onderwerp: Re: [Fot] TR6 cylinderheads 

Make certain that the gasket also has the accommodating holes! 

Sent from my iPhone 



On Nov 30, 2019, at 11:56 AM, TeriAnn J. Wakeman via Fot <fot at autox.team.net> wrote: 





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On 11/30/19 9:08 AM, [ mailto:van.mulders.marcel at telenet.be | van.mulders.marcel at telenet.be ] wrote: 

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That's interesting and may well be the reason.
The passages (the one in my cylinderhead and the 6 holes in the other head) have a diameter of about 12mm). So these passages are facing the block and are located precisely beneath the exhaust ports. My cylinderhead has all the work done, so I'd rather add these passages than searching for another cylinderhead.
Marcel 

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There are usually thin walls between water passages and exhaust passage ways and the spaces around the combustion chambers follow curves. It is not just a straight drilled hole. 

I suggest you chalk up your existing head as practice and start again with an earlier head. 

TeriAnn 






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----- Oorspronkelijk bericht -----
Van: "fot" [ mailto:fot at autox.team.net | <fot at autox.team.net> ] Aan: "fot" [ mailto:fot at autox.team.net | <fot at autox.team.net> ] Verzonden: Zaterdag 30 november 2019 16:50:06
Onderwerp: Re: [Fot] TR6 cylinderheads

Comparing the cylinderhead of this engine with another 6 cylinder head 
(probably also from a TR6 , but from a  Triumph saloon is also possible) 
: it turns out that my cylinderhead is lacking 5 coolant passages. My 
cylinderhead has only a passage just beneath outlet port no 6. The other 
cylinderhead has passages beneath every outlet port. I didn't know of 
this difference  between 6 cylinder heads.


Just a WAG. In the late 1960s and 1970s SMOG regulations were kicking 
in. One of the first things that manufacturers did was have their 
engines run hotter. Some manufacturers accomplished that by reducing 
coolant flow through cylinder heads, reducing passage size and/ or 
eliminating cooling passages. My WAG is that you have a late TR6 head 
intended for the US or just California market. I suggest going shopping 
for an earlier head that still has all the passages.

TeriAnn
Who knows nothing about TR6 heads 

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