Marc Totally understand and this is not a one off with TD experiences, here's mine I had a forged engine built by them, engine out and back in including clutch, bigger injectors etc, i found a company supplying upgraded stem seals called Zisco, whom have cars running 400-500 bhp on these with no issues and no reported issues with them in the Starlet scene. All in all i paid in excess of £3000 for the honour, the day i collected the car it was smoking on tick over and i suggested stem seals but they said it may be down to the compound and they need bedding in so away i go to run the motor