This is from NHTSA site. Problem is that it covers only some states, but we
up north also have hot summers. Maybe the problem is common to all 1996
Volvos 850 but Volvo (Ford) is playing it down.

Make : VOLVO   Model : 850   Year : 1996
NHTSA CAMPAIGN ID Number : 04V368000  Recall Date : JUL 23, 2004
Component: FUEL SYSTEM, GASOLINE:STORAGE
Potential Number Of Units Affected : 105000
Summary:
ON CERTAIN PASSENGER VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN
THE STATES OF ALABAMA, ARKANSAS, ARIZONA, CALIFORNIA, FLORIDA, GEORGIA,
HAWAII, LOUISIANA, MISSISSIPPI, NEVADA, NEW MEXICO, NORTH CAROLINA,
OKLAHOMA, SOUTH CAROLINA, TENNESSEE, TEXAS, AND UTAH. AFTER PROLONGED
EXPOSURE TO EXTREME HEAT, THE FUEL TANK MAY DEVELOP SEEPAGE AT THE HEAT
SHIELD ATTACHMENT.
Consequence:
WHEN THIS OCCURS A FUEL ODOR MAY BE PRESENT AND FUEL SEEPAGE IS POSSIBLE.
FUEL LEAKAGE, IN THE PRESENCE OF AN IGNITION SOURCE, COULD RESULT IN A FIRE.
Remedy:
VOLVO WILL INSPECT THE FUEL TANK FOR FUEL SEEPAGE AT THE HEAT SHIELD
ATTACHMENT POINTS . THE FUEL TANK WILL BE REPLACED IF ANY SEEPAGE IS FOUND.
THE MANUFACTURER HAS NOT YET PROVIDED AN OWNER NOTIFICATION SCHEDULE FOR
THIS CAMPAIGN. OWNERS SHOULD CONTACT VOLVO AT 1-800-458-1552.
Notes:
VOLVO RECALL NO. R139. CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY
TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT
(1-888-327-4236).