12a rubbery smoke from engine

[zxing]

Hey boys I'm in desperate need of some help with my 12a s1 rx7

Recently after driving for any length of time, my 7 will be emitting smoke from just below the exhaust manifold. The smoke has a very rubbery smell, almost exactly like a burnt out clutch. I haven't, however had any issues with the clutch.

I spotted a bit of coolant resting at the bottom of the engine. Upon inspection, I noticed that I had chewed through a whole tank of engine coolant in about a week. Furthermore, there is a significant amount of browny red build up inside the tank.

The engine has a a slight leak the whole time I've owned the car, which may have slightly worsened, but I am unsure about this.

For your reference, I live in Australia so my car is technically an sa22c not an fb, not sure if this makes a difference.

Thanks in advance guys, any help is greatly appreciated.

[codge]

The usual problem with these engines is failure of the 'O' rings which seal the water passage holes inside the inlet manifold (joint to the engine).
The 'O' rings perish & need renewing. A fairly straightforward job if that's what it is.

The browny red build up is a bit more concerning.......but if you've topped up with water rather than coolant for some time maybe the expansion in/out into the bottle would be that colour???

Anyone else got an idea?

[A7RXY]

Dave I think you have it spot on.

Dibs