Odd Red stuff

[M.hunter]

Hello all!
I'm a newbie here but my Stag has been a Member before (she has a Sticker )
Anyway, here goes - my Dilemma.......

I bought my Stag last year, it was fitted with a tr2500 engine which, after doing a few bits n bobs, ran very well indeed - but it's a stag, and it needed a stag engine......
So, found an engine (not easy here in germany there ar'nt many!!) Stripped and Rebuilt it, and she now purs like a kitten.
But......
I've noticed a collection of red/pinky oil on top of the engine block (collect in front of the distributer)
I thought at first it was coolant, but after getting a Sample with a screwdriver and spreading it onto paper could clearly see it is an oil.
I dont have any Red oil in my Stag- even the steering oil is clear.

My question now being:

Has anyone else encountered this?
Could old petrol turn pink if heated on the block?
Am I going mad / maybe colour blind?

I will try and Post some pics I took of it - may take a while, I'm a newbie

Looking forward to some windswept and interesting comments

[M.hunter]

Hello all, me again!
Sorry for the late reply, was feeling under the weather for a few days.

Thanks for the ideas - especially the talcum trick!
Anyway, found the source - and now feel a tad daft......
Thinking back, I filled the cooling system with waterless coolant, and that - when a few days old and heated every now and then turns into a red oily mass.
Feel a bit of a numpty......but, live & learn.....
Again, thanks for the tips!
Out here in Germany there is a Triumph Stag club which I was going to join but wanted to check the UK out too, I've noticed on the german side - although they are fanatical about stags/triumphs in general, they don't really have a spectrum of experience and knowledge I find here.
I think I've made up my mind......