Spun aluminium I suspect, they really are beautifully machined items and they can supply a 90º 'stat. :D

Hmm

Well if the R5 stat does fit, then it appears to be the best solution. No need to cut your hose, minimal cost, plus I like its galic simplicity. Nous nous Français ne sont pas si bêtes.

Pity, I would have tried it but have paid my £50 for the specialist components solution.

See what you mean now Phil
Well shall I take a punt chaps and buy one?

Wonder if the 38mm is excluding the little ridge?
It looks like the ridge is holding the stat into the brass housing.
So grinding that off wouldn't be an option

I've submitted the question and await their reply.

This may be a stupid Question but is there any chance the hotter running american chevy stat. will fit into the british housing ? probably not but that would be an ideal solution for me as i think 88 degrees is still a bit cold and would rather have a higher temp. stat. if possible cheers Tam.

If I hadn't already chucked it I would have taken the section I cut out of my hose when I fitted the Meziere to the local motor factors and seen if one fitted!
I wondered which part they measured and that they may not have been accurate.
I think the ridge is there so that when you clamp it from the outside it stays where it is put!

There is a chance one will. What is the the internal diameter of the housing and/or the size of the 'stat they supply?

If my 90.5º stat is anyting to go by an 88º is going to run a bit cooler. Time will tell how much but on a run mine seems to settle @87º which will have an 88º just about opening. Mine gets to 92º on the dash OBD when it opens and it you can see it drops pretty quickly back to @84º when it (presumably) closes the 'stat and the temp rises again.

Chevrolet stat
 

The chevrolet thermostat is 54mm in diameter and 41mm overall length. it is,at 90.5C, the highest rated 'stat I have found so far.

Renault thermostat-- part one
 

I have recently picked up another 75 tourer diesel after using it the last few days it appears that the thermostat is stuck open IE the gauge only ever moves about 1/4 inch off the blue.So Thought it would be an ideal chance to try a renault thermostat as described in earlier posts while waiting for the specialist components one to arrive for my other 75

I purchased a renault 5 thermostat ( 89c) from a local carparts supplier at a cost of £7.26 inc vat.

I had previousley removed the top hose took off the metal clip that holds the plastic connection on,removed it and tried the new stat in the pipe,it went in upto the flange on the stat so I removed it and put the end of the top hose into a pan of boiling water for about 15 minutes on simmer,removed it,greased the inside of the pipe and with very little persausion the stat went in,using a flat blade screw driver I was able to push the stat in far enough to refit the plastic coupling.
Fitted new jubilee clips allround just waiting now to refit to the engine and try.

will let you know what happens :shrug:

Sounds good, lets hope you get a good result.

Can't wait to see the running temps you get with that. (I expect it'll be fine)