yes, if not then probably the 90 degree bend above the rear of the engine before it passes through the fire wall has let go, as they all do at some point!

There is a stronger silicon replacement available through the club shop. Personally I just used a standard 90 deg bend section from the local factors as due to extra LPG connections in this area I wouldnt be able to use the silicon one, or would have to severely butcher it.

Mine let go originally at 85k, the replacement has since done another 18k with no problems. Cost me about a fiver I think.