driving home today had a bit of a race with a porsche..beat it but pulled up, idling and suddenly smoke starts coming out from the bonnet and under the car and through the vents...looked under the car and in the middle literally just behind where you sit where it seems the exhaust splits (sorry not sure what this bit is..the cat?) there was smoke coming from here, im guessing the smoke coming from the engine was coming up from here too...

 

just checked the oil and the level seems ok...but after hard driving the smoke was very bad...normal driving its ok...Ryan has recently fixed the big end and fixed a crankseal, but did say there was a possible tiny leak still...would it be this?

 

HELLPPP!

Might be a blocked PCV valves? (pushing the oil out through the rear end seal, or perhaps a leaking engine or gearbox sump or drain plug?

Also check the oil pressure sensor, mine has a knackered thread on the pipe where the sensor screws into. Friend of mine (ex Nelson mechanic) told me that only way to cure was to replace the pipe! :(