What is F49 code for 1987 cadillac deville. Car overheats. Now blowing white smoke from exhaust.

SOURCE: My 2002 cadillac deville started trembling when I

Sounds like the start of a head gasket problem. This is common on the 4.6, but expensive to fix.,

SOURCE: we have a 1998 cadillac deville and sometimes the

When the cool air ceases, does any air blow? If your air flow ceases (the cooling fans run the entire time the A/C runs normally), your cooling fans might also be malfunctioning. How many times has your car overheated since the September 2008 head gasket replacement? Repeated overheating will dramaticly shorten the lifespan of a head gasket (if you and/or your husband know your way around cars, the head gasket replacement isn't terribly difficult, just takes ALOT of time- you can send an email to maintjoseph @yahoo.com -no space between the name and the @ sign- and I'll help guide you through the head gasket replacement). I had to replace both gaskets and a head on my 1999 Taurus with a Vulcan engine and have had continuing problems with the cooling system. Your computer might also be acting up if you're noticing other driveablility problems.

SOURCE: '96 Cadillac w/smoking exhaust & overheating

you will get a white kinda smoak its like steam. check the thermostat and make sure its not stuck closed.

Mark Carrington

• 192 Answers
• Posted on Aug 22, 2009

SOURCE: 1996 cadillac deville overheat..radiator?

Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.

SOURCE: My 2002 cadillac deville white smoke from exhaust

Solution #2 is NO solution. WTF?! If you're trying to crack the head, that's how to do it! This guy should stay faaaar away from cars.