I have heard of (black death) under mainained engines lack of oil changes etc and have experienced this before but this is different.
About two years ago i noticed a crack in the cylinder head around an exhaust stud so the manifold would never seal, leak fumes and blow which got so annoying that i bought another cylinder head off a mate who has breaking a ep82 GT 115,000 km, long list of regular oil changes aroung every 5-6 months and when i lifted the cam cover it was a nice shiney silver no brown staining or sludge and the oil was nice and golden syrup coloured.
So i had taken it off keeping every thing in its place changed the stem seals (not sure if they wher genuine seals) and re-seated the valves back in the place they came out with just a fine paste.
Most starlet owners will know what i didnt back then, the early cylinder heads have a square water way on the inlet side and the later ones dont and the head i was going to be using did have the water way. So to get over this i attached my ep91 inlet manifold to a inlet gasket with the square hole so the water didnt piss out the back,
as the ep91 has its own cooling source via the pipes at the side near the temperature sender housing so does not need the water way. But will this effect the cooling of the cylinder head? Have heard of a few people doing this same thing and never encounter a problem! Just trying to think of every thing.
The head was fully checked over prior all this and since it was never boiled up and the head gasket was working fine on the old car and after checking over on a bench the head was spot on not warped, completely flat from corner to corner and all across so skiming was not needed.
It went on with new toyota gaket, strech bolts and torqued up correctly etc.
Was running fine for over a year no problems, oil staying a good golden colour from the time it was put in till the time it was taken out. Even the filter was clean!
But recently the oil goes black instantly after an oil change , not thick, not sludgy and no water is being used or mixing, just black in colour and the engine burns a little bit of oil ever so slighty not much at all though, not so that you would notice but where is coming from? stem seals, turbo oil seals?
Its a weird one!
Im thinking i might change the valve stem seals as i have a set of zisco stem seals and an over head valve spring compressor with air line adapter to fit the spark plug thread size, so might give that a go.
When i did the compression test i had a look under the cam cover and the oil is thin and black but the head itself is still super silver inside.
Thank you to every one for there imput and trying to help with this problem, greatly appreciated.