Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2008 Buick Lacrosse Coolant Leak at Timing Cover › 2008 Buick Lacrosse Coolant Leak at Timing Cover October 30, 2019 at 4:56 pm #895176 college manModerator I would try the sealant on the bolt threads first. Check that its not a cracked coolant elbow.