The Triumph Dolomite Club - Discussion Forum

What is the purpose of the centre hole in the rear cylinder head cover on a Sprint part 218061 there are 6 fixing bolts but I am unable to workout what the seventh hole in the centre is for, any help would be appreciated
Regards Geoff

Geoff

There isn't one there usually on a Sprint. But you can drill & tap it for a coolant take-off.

The works weber manifolds with the remote thermostat housing don't have heater pipes.

Then you take off from the rear plate.

Jeroen

geoffjimbo wrote: ↑Fri Mar 01, 2019 11:05 am What is the purpose of the centre hole in the rear cylinder head cover on a Sprint part 218061 there are 6 fixing bolts but I am unable to workout what the seventh hole in the centre is for, any help would be appreciated
Regards Geoff

This is the modified plate you can buy to provide a heater take-off on the back of the head. I use one of these on my TR7 with a Sprint engine. The standard Sprint one is usually just the flat plate without that centre hole.
Second picture shows the standard Sprint plate with a standard TR7 one and the modified Sprint one for a TR7.

Where does the pipe connect to on this modification and are there any other changes to pipe work to make it work ?