last year I rebuilt the engine on my 96 spec JDM ITR, Everything was renewed on it with OEM parts, bearings, pistons, rings, oil and water pump, new gaskets everywhere the full works.

Now, over the last 5 or so moths the car has began to smoke again quite heavily, it's also leaking quite a bit of oil. For example if I had been driving normally for a while and then accelerated hard a stream of blue smoke would come out of the exhaust. Similarly, If I revved the engine hard, backed off the throttle and let the car coast down, then re-apply the throttle large amounts of blue smoke would again come out of the exhaust.

Oil was leaking from what appeared to be the head gasket behind the exhaust header and the oil pan gasket.




Now today I pulled the engine out with the intention of having to replace the pistons and rings again with 81.5mm items, It already had 81.25 OEM pistons and rings last rebuild. However, when I pulled the motor out I noticed that there was quite a bit of oil in the inlet ports on the head: There was a little in the inlet manifold, but more on the ports of the head and small drops on the valve guides:

Head:

Inlet manifold:


The breather valve was replaced with a new item when I rebuilt the engine, but I can't help but think that the issues i'm having may be due to too much pressure in the crank case.

Can anyone offer any suggestions as to what my problem is? I had assumed that it was a piston ring issue but now i'm not too sure. (I'd assumed the placed that bored and honed the block had messed up and that it was because of this, they aren't the best of places but not many places can do that sort of thing round here)

So, any advice or suggestions? I can supply whatever info is needed from the build as I have it all documented...... apart from the bore and hone which I didn't do.

Thanks from the UK.

 

possibly head gasket