Hi,
In such cases, I used to put an Initial Condition (IC) on the oscillator tank, when transient simulation starts the IC represents a disturbance in the oscillator that can trigger the oscillation, but you should take care not to set the IC value too far from the expected DC value of the node otherwise the transient simulation will take a lot of time to reach to the proper DC bias of the circuit.
I also advise you to insert an AC current source at the +ve feedback point of the oscillator and do an AC simulation before transient and notice the output at the tank, if there is peaking in the frequency of interest then the oscillator will probably oscillate when you do transient simulation.
regards,