OK sorry to keep asking advise but if someone could answer the following question I would appreciate it.

Question
Is it normal for the crankshaft to be discoloured at the blades next to the big-end bearings, the only way that I can describe it is that they have got a bluey black colouring to them, the same effect that you would get if you tempered a piece of metal i.e.: when you heat it then dip it in water.

I have done a search to see if I could find any photos to compare it with to see if it was normal but could not find anything

 

Not uncommon, though your one does look like it has got very hot???

 

Thanks for the quick reply mate,
I thought that the crank was overheating due to the bearings being to tight, it only had a rebuild back in June 2002 so I was thinking that they might of fitted the wrong size bearings.

the crank was in perfect condition then and only needed a polish, but I dont recall seaing the discolouring then.

 

you may be onto something with the tight bearings....
i cant think of any other reason but then your car has been reliable?
i rebuilt my engine last year and there mas no exssesive heat marks

 

It is reliable or as reliable as cossies go it's not noisey in any way so I presume it's OK but just wanted to check before I put the sump back on.

Not done meny miles since the rebuild eather, so it's not as if it's a high milage thing.

 

my spare crank is like that so ill be keeping an eye on this post

 

Anybody else got any views on what causes this just to ease my mind, don't want the crank disintegrating on me