Bourdais posted a 1m34.732s to head the times 15 minutes from the end of the one-hour session, eclipsing his 1m34.949s that put the #01 Cadillac DPi-V.R at top of the timesheets early in another session affected by rain.
The track was slightly damp when the green flag was waved and there were further spots of rain mid-session, but times were coming down when the session was red-flagged with just under 10 minutes remaining.
