Question about 2000 Cadillac DeVille

1 Answer

My 2000dhs is running hot. I replace water pump and thermostat. iI check the oil there is no water in it to indicate a broken head gasket. i was told about some type of heat sensor on side of the engine.Not sure anymore

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

Yes, this is very common problem of the northstar platform. Head bolts aluminum thread inside the engine block stretching. Although Cadillac improved it in 2000 year model, it persisted on a lot of cars. You will not see any water in oil, at least for the first 5-6 thousand miles, but it will get worse and worse every time, so aventually you will. Engine will "drink" your coolant and no kind of coolant additives will fix that. Especially big coolant loss will be if you floor your gas a lot. On the freeway however you can go for an about 100 miles before engine will consume most of the coolant and overheats. You need to fix the block, cadillac calls the proces "time sert" - they drill bigger holes in the block, thread it and put inside inserts with outer and inner threads, were your original head bolts will go. Dealer going to charge you $5500 for that, and most mecanics will charge around $3200. That is why so many people selling their caddys cheap on ebay saying that there is a coolant leak somewere. I bought two caddys like that. Now I can fix that kind of problem easy. I bought all of those expensive tools for time serting. And by the way, something I learn the hard way, even if you are mecanic but never ever rebuilded northstar before expect lots of problems and difficulties. Very complicated hi tech engine with balanser shauft. Parts are expensive too, upper set of guskets will cost you about $320 and if you buy all the lower seals too than $500. Piston rings $220 and good luck finding it in autozone. I guess it is time for you to find out how are those used car dealer shues fit you :-)

Posted on May 12, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Ford Ranger overflow tank bubbling and overflowing, running hot, white smoke, after water pump failure.

The smoke could be the water boiling. Although it is possible that you blew the head gasket, if the vehicle overheated badly, It is also possible that you still have some air in the system. Replace the thermostat and seal /gasket and run the vehicle while adding coolant. Do not install cap on until both houses upper and lower are hot to the touch. This is an indication that the thermostat opened and coolant is actually circulating. Good luck.

Mar 13, 2012 | 1992 Ford Ranger

2 Answers

2004 Audi a4 1.8T quattro has overheating engine problems but no heat is working when we turn on the heater

goodyear are tyre mechanics
water in the oil is from a hole in the housing (aluminium timing chain cover ) behind the water pump impeller or problem head
before anything was replaced , a compression test should have been done to determine the condition of the head and head gasket
next a coolant pressure test should have been done to determine if there was a leak in the cooling system ( the housing crack would have been obvious at the test
water pumps always work if there is water for them to work in and only need replacing if there is a water leak from a hole in the housing ( seal failure ) or there is a failed bearing noise
I could suggest that you find an accredited professional service center that has experience on your make of car and get a proper diagnosis before you waste any more time and money on tire mechanics

Mar 25, 2017 | 2004 Audi A4

1 Answer

My Grand Prix stared running hot. We replaced head gaskets and intake gaskets, replaced water pump, thermostat, and flushed radiator. My car is still running hot. The heat not blowing hot even after new...

are you sure that the radiator is not clog ,also check the cap for broken gasket also check the hoses for stiffness i would also wanna run it without thermostat to see what happens ,some times they come defected from manufacturer good luck

Mar 30, 2011 | Pontiac Grand Prix Cars & Trucks

1 Answer

My Golf suddenly now starts to overheat badly, and although the oil buzzer goes off, the temp buzzer stays quiet. It's full of oil, and antifreeze.

Hi could you try doing this:
get the engine warm then turn the heater on to its hottest setting then turn it on, if you only get cold air then this points towards the thermostat staying shut and if this is the case it will need replacing before you do any damage to the cylinder head and or cylinder head gasket.

if you have hot air coming out the the problem could be one of the following problems.
1, check for any signs of leaking coolant if you have a leak then this lets air into the system causing an air lock this stops the water pump pumping the coolant around the system and this prevents it from cooling, the leak could be either split hose, damages rad or leaking water pump so have a good look around all the engine and pipes looking for leak, the water pump is located where the timing belt is so have a good look around here.
2, water pump could be damaged and may need replacing.
3. worse case you head gasket could be damaged, if you find no leaks ant the thermostat is ok then your going to need to get the head gasket checked your car will need taking to a garage to have a color test done this checks the coolant for signs of engine gasses and if they are found it indicates head gasket failuer.
it will cost next to nothing for them to do this test.

if it is the head gasket then you need to find out what caused the head gasket to fail, it could have failed on its own or the water pump or thermostat could have caused it to fail.

check the oil for signs of water if you have a white substance if the oil filler cap then this is a sign water is getting into the oil via the head gasket, also check the coolant for the same signs of a white substance this indicates head gasket failure and the only solution would be to have the engine re-built to replace the cylinder head gasket.
this is a big job to do

let me know how you get on or if you need further assistance ok

Aug 14, 2010 | 1989 Volkswagen Golf

3 Answers

We started the car and within 5 minutes the car was overheating

Check the level of the coolant (might be too low), the belt for the water pump (might be loose) and the fan (might be dead). If all are ok then the thermostat is faulty - it doesn't open - replace it.

Jun 19, 2010 | 2000 Pontiac Sunfire

1 Answer

After spending 880 dollors on having a head gasket water pump and radiator replaced in my 1998 pontiac sunfire 2.2 liter it has no flow thru the brand new radiator engine runs supur hot 260 degrees in 2...


Nov 11, 2009 | 1998 Pontiac Sunfire

2 Answers

Overheating after a new water pump, thermostat and radiator still runs hot quickly

if not head gasket then check your oil pump, a lack of lubrication is probably the culprit, either that or a clogged coolant channel in the block, but the vehicle would have had to sit for a long time to encounter coolant rust substantial enough to clog passage ways.

Nov 05, 2009 | 1988 Jeep Cherokee

1 Answer

88 Bronco ii Coolant not circulating

Good Day,

Sounds like the thermostat is working properly, the only other cause for the valve/lifter noise could be the oil pump is not pumping enough oil up to the top of the motor. I suggest doing an oil change(if you haven'y aleready), be sure to flush several quarts through, after sitting for 5 years I'm sure the old oil is pretty sludgy, this well help rule out this possibilty. As far as the water pump goes, It either works or doesn't typically when they are on there way out the will leak from the gaskets. A bad head gasket would cause white smoke form the exhaust as coolant get's into the oil and is burned off, so I don;t hink this is the problem.

Here's a start for you, hope this helps and good luck

Jul 01, 2008 | 1988 Ford Bronco II

Not finding what you are looking for?
2000 Cadillac DeVille Logo

364 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides