Inlet Manifold part numbers

[Kev43]

Hi All,

I read somewhere that there is a difference between the mk1 and mk2 inlet manifolds, does anyone know how to identify the 2 types?

cheers
Kevin

[Goldstar]

Seems to have changed at engine number LF11429E from part number 309113 to 312506 -different again for emission controlled cars. 10,000 series engines were being fitted in 1972 MY and into MY '73 apparently.

One of those part numbers will be on the manifold.

I'll get me anorak. Love the parts catalogue

[Motorcycle mad]

Hi Kevin
I think the links to the Rimmer web site below may help you understand the differences with the two manifolds.
My understanding of the main difference between the two manifolds is that the water pipes are connected up differently, (and in fact the whole cooling/heater systems are routed differently) The main difference with the manifold is that one of the water pipes is made of metal with a threaded union on the front right-hand side of the manifold, and this union is positioned in a more forward position on the Mk1, refer to the Rimmer catalogue page link, and look bottom left, the metal pipe is shown on the other catalogue page. At what point Triumph made the design changes I don’t know.

http://www.rimmerbros.co.uk/Item--i-GRID005191

http://www.rimmerbros.co.uk/Item--i-GRID005171

Ken

[Kev43]

Thanks Both

That has confirmed that I do have a mk2 manifold as suspected.

Kevin

[StagnJag]

The easy way to check is to look inside the thermostat housing. The MKII has a hole at the back and requires a thermostat with a 'foot' to close it off when it heats up. The MKI doesn't have this hole and requires a thermostat without a foot.

Rgds

Dave

[elvimto]

IMG_2039 copy.jpgIMG_2037 copy.jpgThis is a Mk 1 type manifold

cheers Stuart

[Kev43]

Hi Stuart,

Thanks for the pictures, that makes it clear.

one point though, is that not a MK11 thermostat in the picture one with a foot.


Kevin

[elvimto]

This was taken when I got the car it now has a MK2 inlet manifold fitted, the stat was fitted with a jiggle pin and was set to 74 I believe. When I first started working on the car it used to heat up very fast and take a while for the coolant to go to the radiator, I was lucky enough to find a Mk 2 manifold over here so on advice from owners I changed it the car runs at 185 to 187 now. I have added a digital gauge in the return line to the radiator and that gives you exact temp readings no more second guessing.

cheers Stuart

[martin]

That's interesting Stuart, how did you do it ? any pictures ? Martin.