Category: Cadillac overheating troubleshooting

Cadillac overheating troubleshooting

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cadillac overheating troubleshooting

Please login or register. Did you miss your activation email? All Cads. So I have had this persistent problem with my "good" Eldorado the "rough one" is still for sale, by the way! Reading between the lines of what other people have been saying about these cars, I am gathering that my issues are not that far off from what others have seen. My Eldorado had 48, miles on it when I bought it a year and a half ago. I have put 3, miles on it since then, and about 1, miles in a single week right before Thanksgiving: Los Angeles to Las Vegas and back and then up to San Jose.

The cars have a temperature gauge. It has four divisions. My car has a standard ? On a cold day and driving slowly on the open road it stays nailed there, just like a modern car. On a hot day, in traffic, going uphill, or whatnot, it goes higher. My problem is that I get pinging from the engine when the temperature runs offat altitudes below feet.

cadillac overheating troubleshooting

On the way to Vegas and back I was watching the temperature gauge which would basically tell me which way the road was sloping: high temp means uphill, low temp means downhill. So retard the timing, you say? Well the vacuum advance is set to a bit less than factory at this point I set it to factory settings and have since backed offcentrifugal should be OK car actually doesn't ping at full throttle and high RPM so.

Cadillac Deville: Problems & Solutions

What I need is less vacuum advance. But if I reduce the vacuum advance, the car overheats! I have an aux. More background: I have replaced the timing set the nylon was totally gone with a new Cloyes, have a Comp Camps H camshaft, carefully degreed in, with new lifters and pushrods, pushrod clearance checked.

I know what a retarded camshaft feels like, and that's not the problem.Our Cadillac Escalade withmiles has just started overheating and we have no idea what could be causing this.

Cadillac North Star Overheating

One thing that can cause an overheat is a clogged cooling system. The radiator or heater core could be clogged. Another is that the thermostat is not opening. An overheat could also be due to the cooling fan not coming on due to a bad relaybad fan motoror bad temperature sensor. One other thing that this overheating could be caused by is a failed water pump.

The water pump impeller could have sheered off internally and is not circulating coolant. If you would like help looking at your car, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this overheating issue for youand make or suggest any repairs as needed.

Q: Why would my Cadillac escalade overheat? It's atmiles. Ronny Bijj Automotive Mechanic. Thank Ronny. Hi, thanks for writing in. Was this answer helpful? Thank you for your feedback! Sorry about that. Why wasn't this information helpful? Recommended Services. The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details. Related Questions.

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Home Questions. Year I don't know. I would suggest having a professional from YourMechanic come Read more. There are a lot of possible causes of this.

How to Troubleshoot an Overheating Engine

The most common being a bad fuel pump or crank position sensor. Both are very common. I typically start by checking the computer for codes with a scan tool andBuilt as an answer to Ford's 4. It was the first GM production V-8 built for overhead cams, and the last of the "non-corporate" V-8s the company would ever use.

The Northstar never reached the epic levels of popularity of its Ford cousin, thanks largely to its phenomenal repair costs and disposable everything. The Northstar is a fine engine if you find a good one -- but woe to those buyers who don't know to spot a bad one. Far and away, most of the Northstar's issues have to do with oiling.

GM fixed a lot of these problems in the model year, but earlier engines are known to develop leaks around the main seals and valve covers. Oil pressure can disappear entirely on early to engines, as a result of debris caught in the the finicky oil pressure relief valve. The former requires replacement of the affected seals and gaskets, but the latter is much easier to deal with.

These engines use external oil pumps mounted to the front of the block; if you see low oil pressure, remove the oil pump and clean the debris out of the assembly. It's a pain, but at least it's fairly cheap. It's not unusual for pre engines to go through as much as a quart of oil every miles. It's not leaking, it's just burning off in the combustion chamber. The problem goes back to the piston rings, which can get stuck in the ring lands as a result of carbon buildup in the ring grooves.

When the piston rings get stuck in the grooves, they can't seal or wipe the cylinder walls. That allows blow-by to go into the crankcase -- resulting in a loss of power and fuel economy -- and oil on the cylinder walls to burn in the cylinders. GM is aware of the problem, and has a ring-cleaning procedure that involves filling the cylinders with a solvent via the spark plugs. After two -- and not more than three, hours -- the solvent will dissolve the carbon. Some people have done the same thing at home with Mopar Top End Cleaner, Seafoam or equivalent; running a high-detergent oil or cleaning solvent like Marvel Mystery Oil may solve the problem over a long enough period of time; but it will take so long, you may end up damaging the rest of the engine in the process, It might be best to have someone experienced in the GM procedure take care of it.

GM solved the ring carbon problem by the model year, but somehow wound up creating a different carbon problem in the process. Engines built in and have a tendency to build up carbon in the cylinders. The resulting carbon deposits heat up and act like glow plugs in the cylinders, causing the engine to knock and ping under hard acceleration.

It's a simple enough problem to solve -- Seafoaming the engine or using top-end cleaner should get rid of most of it, and you should be able to dissolve the rest by using a quality carbon-dissolving fuel system cleaner in your gas for the next ten tanks or so. The quick solution is to fill the cylinders with solvent like the ring-cleaning procedure, but this carbon buildup usually isn't severe enough to warrant that.

After the carbon is gone and your plugs are clean, run a carbon-dissolving fuel system cleaner every third tank or so to keep the gunk at bay. Say what you will about Cadillac, but they practically reinvented the market for top-end cleaners, fuel system cleaners and head gasket sealers.

In addition to the aforementioned problems, Northstars of all years have a nasty habit of blowing head gaskets. Especially after any kind of overheating event. One of the big selling points of the Northstar was its resistance to overheating, and it certainly has that. But overheat it once, and you'll find out how little margin of error GM engineered in for excess metal expansion.

Part of it has to do with the engine's basic design, but a good bit of it has to do with the awful, single-use, torque-to-yield head bolts Cadillac used. TTY head bolts are a bane to all mankind; once tightened, they permanently stretch.

That's nice for assembly purposes, but overheating a TTY-bolt engine -- especially one with aluminum heads -- stretches the head bolts further than they were meant to go.I've had changed the thermostat and water pump and the car still overheating any suggestion. G A answered 3 years ago. Do you notice small air bubbles in the coolant recovery tank when you first start the engine, this would indicate a possible blown head gasket, and these are known for doing just that.

If not then these things can be a real bear getting the air out, I start by filling the radiator through the upper hose on the engine side, when it takes all it can quickly shove it back on and tighten the clamp, then fill the recovery tank and raise the passenger side at least 6 inches, a car ramp is just right, start the engine and keep adding fluid as it takes it, when it stops taking fluid put the cap on and shut it off and wait 15 minutes, then check level in the recovery tank, if low carefully remove the cap as there might be pressure there, if there is too much pressure wait a while longer, when pressure drops enough for safe removal, top off the system and restart watch the level as the engine warms up, if it threatens to run out of the tank reinstall the cap and let the engine continue to run until the thermostat opens, and that should take care of any air pockets.

Common Cadillac engine problems and how to fix them

Then make sure the cooling fans operate properly. Torpedo answered 3 years ago. I spent 5 months researching the problem and finally found Norm Huhn who manufactures the inserts needed to fix the aluminum heads and keep them attached to the steel engine block. After I finally figured out what the problem was on my wife's Cadillac Sedan Deville, and after wasting my money on what's called the TRIPLE PLAY, replacing the water pump, the thermostat, and the crossover upper gaskets coupled with the use of a liquid sealer which never works my mechanic told me not to throw any more money into this car.

Hogwash, since in my heart, I knew that was the proper way to fix the problem and a good mechanic somewhere out here who knows how to do the job right. Even my own local Cadillac Service Manager was in denial about this engine's inherent manufacturing problem from through Norm gave me 3 good leads, all within 30 miles of where I live, and I chose the one guy who had no-call-backs on any of his Northstar Head Gasket repairs.

YES, it is a lot of work! A full day to remove the engine from the bottom of the car, a full day to break the engine down and drill out the 20 new slots for the Huhn inserts, replace the gaskets, and torque the new bolts, and another full day to reinstall the engine.

As it turned out, our car also needed new front brake pads, 2 new front rotors, a new power steering pump, a new starter, and a new E-Brake release contact, which my wife and I were well aware of. And now, my wife's Cadillac runs just like it did when she drove if off the dealer's lot 17 years ago. Jeff answered 3 years ago. I have a Deville that's been over heating like crazy. I've changed the thermostat and the housing, the water pump and it's housing, the radiator the upper and lower hoses it still was over heating did the block test and headgasket test all was good.

I did noticed no one never talks about that coolent temperature sensor that can also cause over heating. I just changed that which goes along with the coolent system that Ppl over look that is very important and can cause a car to over heat. My dash yeastday read it was over heating but the engine was fine. No bubbling out the resorvor. Maybe it's the computer. Today it hasn't overheated yet.

cadillac overheating troubleshooting

I've changed all that needed to be changed and I'm just puzzled what else could it be Oyeah I unplugged the battery cleared the codes so the car can reboot plugged battery back up to reset everything and see what happens.

Oyeah I cleaned the lines from the tank to the block going across the intake up top. Somebody let me know what you think. I also forgot to mention the heat is blowing cold now. I haven't flushed the heater core yet but would that cause the heat to blow cold?

I know a little something that I've learned since owning my 00 Deville I've had this car going on 6yrs. I never had any major issues till now with it. This Northstar is dangerous when it starts getting ill!

People come from surrounding states for him to fix them. Call him Where to Buy K-Seal. Cadillacs have long been a car beloved across generations — their reliability and luxury quality securing their strong reputation.

But like any car manufacturer, certain models of Cadillac can suffer with particular engine problems more than others. The challenge is knowing which models are most susceptible, and how to treat them fast to prevent expensive repairs.

Cadillac DeVille overheating? Unfortunately this is a common issue for this model of Cadillac. The popular and Cadillac DeVilles are prime casualties, with the engine tending to overheat due to a leaking head gasket. Alternatively, a water pump leak could be preventing your coolant circulating freely through your engine.

Either way, if not identified and fixed quickly this overheating may cause the cylinder head to expand — resulting in damage to the engine block. K-Seal is tailor-made to solve these issues, plugging the leak to prevent any coolant leaks from reoccurring.

A cornerstone of older Cadillac models, the Northstar engine was hailed for its cutting-edge technology, becoming synonymous with the Cadillac brand. However, the complexity of Northstar engines meant they quickly became notorious for head gasket failures. Cadillac DTS, Buic Lucerne and Cadillac STS were the last cars to use a Northstar engine, but generally it is felt that those models from onwards do not suffer as much with the head gasket issues that plague earlier models.

If you have a model prior to this, however, the chances are your Cadillac could be at risk. Head gasket leaks can be difficult to identify in the Northstar engine.

The usual symptoms of head gasket failure, such as the radiator constantly needing to be topped up with water, or plumes of smoke coming from the exhaustare not always apparent. Should you see it dropping quickly in a sort space of time, it is highly likely your coolant is leaking.

Simply add K-Seal to your coolant mixture and our unique formula will seal the crack or hole responsible for the leak. Widely available, you can find your nearest stockist using our handy search tool. For example, the Cadillac Catera often experiences oil leaks from the oil cooler and the valve cover gasket.Left alone, the liquid in the radiator eventually boils over, and steam rolls out from under the hood.

If your vehicle overheats often and constantly loses coolant, the problem may be leaks in your cooling system. If your vehicle overheats in normal weather and traffic, you may need to add liquid to the system, replace the thermostat, adjust or replace the accessory belt, or check the water pump.

The first thing to check if your vehicle overheats often is the pressure cap. Sometimes the gasket on the cap deteriorates and lets pressure escape, which causes the cooling system to malfunction. Here are some other circumstances that can cause a vehicle to overheat:.

Have a service facility place your vehicle on an electronic diagnostic machine to check your timing and adjust it if necessary. The remedy is to have a radiator specialist remove and inspect the radiator. If the belt seems loose or frayed, you can try to replace it. Collapsing bottom radiator hose: Occasionally, a bottom radiator hose begins to collapse under the vacuum that the water pump creates, and the impaired circulation causes overheating.

Under normal circumstances, you can prevent overheating by checking the level of liquid in the system and maintaining it properly. How to Troubleshoot an Overheating Engine.Email us for fastest response, we receive a very high call volume.

Is your car worth fixing? Cadillac Overheating? So your Northstar powered car overheated, or it's blowing white smoke. It may be losing coolant and you can't explain where it's going. There are three ways the head gaskets can fail on a Northstar.

A blown head gasket doesn't mean your car is toast- Cadillacs and Oldsmobile Auroras truly are performance vehicles that love to be driven. Don't give up on your car yet. I've been told it's probably head gaskets.


Could this be true? Of course, you won't want to have the head gaskets replaced if it's not necessary. Many people don't get straight answers when it comes to head gasket diagnosis, especially when it comes to Northstars. While we strongly recommend having this work done if your car is a model year and older, as preventative maintenance, it may not be necessary quite yet.

Only do this where it is legal! Repeat this process, monitoring coolant temperature.

cadillac overheating troubleshooting

If you have the digital read-out, the temp should never hit the degree F mark. Let it cool down a bit, top off your coolant and make your way back home. At this point, keep your foot out of the gas as much as possible. The best test: get a "combustion leak test kit" available from Napa or Autozone. It will check for exhaust gasses being present in the cooling system. This test never fails.

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