Question about 1995 Cadillac DeVille

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1995 cadillac deville v-8 4.9L ----coolant leaks

Coolant leaks is located above the starter & below exhaust looks like its coming from in a small tubing attached to the engine or behind it. need advice/ help,,thx in advance

this tubing(3/8 or 1/2 diameter & about 3"-4" long) is not made of rubber or plastic,,,its could be made of metal or aluminum

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  • Anonymous Nov 24, 2008

    coolant leaks above the starter and below the exaust but when i looked under and had it pressured tested it had a little leak around where the exaust bolts to the block so how hard is that to fix



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  • 74 Answers

Freeze plug is leaking or possibly trans cooler line

Posted on Nov 18, 2008


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How do you change a thermostat on a 1997 Caddilac deville w/ Northstar engine? Also, Where is it??? Please help!

Check this diagram location...


Fig. Thermostat installation - 4.6L Engine

4.6L Engine

  1. Drain the coolant to a level below the thermostat housing.
  2. On some vehicles, access is easier if the front-end beauty panel and the air cleaner are removed.
  3. Remove the 2 bolts securing the thermostat housing to the intake manifold.
  4. Remove the thermostat housing.
  5. Remove the thermostat and O-ring from the housing.
To install:
  1. Install the thermostat and new O-ring to the housing.
  2. Install the thermostat housing to the intake manifold. Tighten the thermostat housing bolts to 18 ft. lbs. (25 Nm).
  3. Refill the cooling system using a 50/50 mixture of water and ethylene glycol antifreeze.
  4. Install the air cleaner and beauty panel, if removed.
  5. Start the engine and check for coolant leaks. Allow the engine to come to normal operating temperature. Recheck for coolant leaks.
Hope this helps.

Sep 02, 2011 | 1997 Cadillac DeVille

1 Answer

My 2000 Cadillac Deville engine light on. Engine code PO420

Catalyst System Efficiency Below Threshold (Bank 1)

A code PO420 may mean that one or more of the following has happened:
  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Retarded spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of reading

  • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2), replace if necessary
  • Replace the catalytic converter

May 11, 2011 | 2000 Cadillac DeVille

1 Answer

Where is the starter located on the Deville Concours

Hello: The Concours has the Northstar engine and the starter is UNDER the plastic intake manifold. Remove intake to replace starter.

Jan 17, 2011 | 1995 Cadillac DeVille

1 Answer

I have a 1997 Cadillac deville how can I tell if the headgasket is blown

If you got white smoke out the exhaust,it is coolant

If you loose coolant,it has to go somewhere.

You could do a compression test,both dry & wet

I would do a cylinder leak down test,dry & wet

There are products that test your coolant from the
radiator liquids

You could look at exhaust gas emission numbers

You could look at O2 Sensor Data

Want more?

Dec 04, 2010 | 1997 Cadillac DeVille

1 Answer

Where is the starter located on my 1995 cadillac sedan deville

The location of the starter is as per the car engine.If its 4.5 liter then starter is located on front bottom of the engine.And if its 4.6 liter engine then starter is located under the intake manifold. And On the 4.9 liter the starter is located on the bottom side of the engine. ------------ This will help.Thanks.Helpmech.

Nov 18, 2010 | 1995 Cadillac DeVille

1 Answer

How do I find and change an 02 sensor on a 1991 Cadillac Deville 4.9 Liter engine

The Oxygen Sensor is located: Under hood, center, front engine area, above exhaust pipe flange, mounted in exhaust manifold
Application: Front

Under hood, center, rear engine area, above exhaust pipe flange, mounted in exhaust manifold
Application: Rear

I hope helps (remember to rate this). Good luck.

Oct 05, 2010 | 1991 Cadillac DeVille

1 Answer

Im trying to locate a coolant leak in my 1995 Deville 4.9 liter

check hoses and clamps. if passenger side floor is wet check heater coil. if you have steam coming from your exhaust and it isn't cold outside check head gasket. If you smell a sweet smell coming from exhaust the intake manifold or gasket may be leaking

Aug 30, 2010 | Cadillac DeVille Cars & Trucks

1 Answer

Need some help to change the starter in a 2003 Cadillac Deville

Take you time. Mark all of your bolts. Have your new starter ready. Do the whole job at one time. Don't give your self time to forget. Find the starter, look from the lf of the car next to the intake down in the valley of the engine. You should see it. Now everything above it has to come off. Good Luck!

May 25, 2010 | 2003 Cadillac Deville

1 Answer

We have a 2000 deville that started leaking coolant. we replaced the thermastat and it continues to leak coolant. it wont overheat as long as we keep the coolant in it. it leaks alot more when the car is...

check condition of radiator,radiator & heater hoses,look for spots wet w/ coolant.look more or less straight up above where coolant puddles on ground.engine block is equipped w/'freeze plugs' that sometimes corrode & leak.washing suspected area of leak with an engine degreaser product may aid in locating source of leak.

Sep 28, 2009 | 2000 Cadillac DeVille

3 Answers

How do you change a starter on 2002 cadillac deville?

easy as, 2 bolts at the front and 3 wires at the back remove all and it should come free, the motor is at the front of the tranny it is attached to the flywheel, disconnect battery first

Jun 23, 2009 | 2001 Cadillac DeVille

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