Tip & How-To about Cadillac DeVille

Cadillac Northstar Overheats

This can be caused by a number of things most commonly failed headgaskets. You can use a cooling system pressure tester to pressurize the cooling system to see if it holds pressure if not then the headgaskets are likely leaking. You can also get a chemical tester to check for exahust gas in the coolant, if exhaust gas is present then replace the headgaskts. If both tests turn out fine first make sure your cooling fans are working if so remove your thermostat to see if engine stays cool, if so replace thermostat. If nothing works up to this point you may have a broken water pump or clogged radiator. You can use a laser temperature gun to check for hot/cold spots on the radiator if you find any replace. Otherwise remove the water pump to make sure the plastic impeller is not boke and still attatched to the shaft.

Posted by on

Cars & Trucks Logo

Related Topics:

Related Questions:

1 Answer

my 2010 journey is over heating what can I do to stop it


Figure out why and correct this issue. There are numerous things that can cause overheating and many are beyond the average do it yourself repair. Some possible causes are: failed thermostat, failed water pump, broken water pump belt, low coolant level, failed cooling fan, failed electrical cooling system, failed heater core, leaking hose, air pocket in cooling system, failed radiator cap, failed radiator, cracked head, cracked block, failed headgasket etc. Beware it only takes one time overheating to damage the cylinder head or headgasket. Get that checked.

Oct 28, 2016 | 2010 Dodge Journey

1 Answer

engine runs 15 or so will shut off and starts when cool. Replaced fuelfilter and fuel pump relay. still does the same thing.


If you don't have any check engine warning light on your dashboard relating to EGR system means it has to be the FUEL PUMP according to you fuel pump relay and fuel filter was replaced but the most common cause by that is fuel pump...to verify have you try to install Fuel Pressure Tester to a fuel line it might not be the specified psi while observing the tester a several minutes tester shows it dropping down the pressure till it shut off by itself.

Dec 09, 2014 | Cars & Trucks

4 Answers

1990 honda civic Dx 1.5L


try bleeding the air out of the cooling system right after you start the motor up. this will allow you to get all the air out but not steam. do this until the coolent comes out. common cause, it could be vapor locking and not letting the coolent flow causing OVERHEATING. hope this helps

Jun 18, 2008 | 1990 Honda Civic

Not finding what you are looking for?

1,276 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8499 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Loading...