Question about 1997 Cadillac DeVille
The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
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.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.
Posted on Mar 09, 2010
There's a few things I'd take into consideration. As stated in other posts, yes make sure transmission fluid is up to proper level. Also, depending on what engine you have, there may be an electric assist pump or even 2 in the system. On some, they have an electric pump to circulate coolant through heater core at idle to maintain proper heat , as well as another to assist mechanically driven pump when coolant temperature gets to approx 195F. Obviously when going up hills there is an added continuous load on engine, which will cause it to run hotter, thus I would expect that electric pump to be kicking in, and if not, may be the cause. Also the added load of climbing hills, creates added exhaust temperature, and if there is any restrictions, the results would be overheating. Quite often you may feel at least a little lack of power compared to what it used to be, or an increase in fuel consumption, or both when exhaust has a restriction. With that said, a weak water pump is also a possibility. Hope this sheds some light on what to pay attention to.
Posted on Mar 07, 2010
I'd check the transmission fuild level.
Posted on Mar 06, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jul 29, 2012 | 1997 Cadillac DeVille
Sep 13, 2011 | 1996 Cadillac DeVille
Apr 06, 2010 | Cadillac DeVille Cars & Trucks
Jan 30, 2010 | 1997 Cadillac DeVille
Aug 27, 2009 | 1992 Cadillac DeVille
Jul 16, 2009 | 1999 Cadillac DeVille
Mar 31, 2009 | 1997 Cadillac DeVille
Mar 25, 2009 | 2001 Cadillac DeVille
Oct 14, 2008 | 1999 Cadillac DeVille
Sep 14, 2015 | 1997 Cadillac DeVille
651 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: