Question about 2002 Chrysler Voyager

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I have an antifreeze leak from the lower intake

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Sounds like a water pump or seal,,so service centers give u a ,,,free,,, inspection,,,then u will know what u need

Posted on Apr 28, 2010


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Using antifreeze but no sign of leakage on 2006 sienna

After it warms up check exhaust for steam. Probably head gasket leaking into the exhaust.

Sep 14, 2014 | 2006 Toyota Sienna

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Lower manifold leak 2004 chevy

If the lower (intake) manifold is leaking, which is very common, then you should either have an external antifreeze leak, or antifreeze into the oil. Oil will not go into the antifreeze. The coolant used in this car (DexCool) does, however, form an oily substance on the surface over time. I would recommend having the antifreeze flushed out, and the reservoir cleaned.

Jan 27, 2013 | 2004 Chevrolet Impala

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Losing antifreeze changed thermostat and resivoir cap

Check you oil for signs of coolant contamination. If coolant is present in the oil, you may have a leaking head gasket or intake manifold gasket. If there is no sign of coolant in the oil, the antifreeze could be leaking past the intake gaskets and into the combustion chamber. It could also be a leak that only shows up when the engine is running, and you are losing the coolant as you drive. This kind of leak is very difficult to locate. You will have to look for signs of antifreeze around the upper and lower intake gasket area with a strong flashlight. Also check for signs of leakage at the upper and lower radiator hose connections and the drain valve at the bottom of the radiator. If you smell antifreeze inside the car, check the carpet for dampness caused by a heater core leak. Sounds like a lot of work, but these mystery leaks as I like to call them, can take repeated inspections before you finally locate them. I hope I have been of some help. Good luck and let me know what you find.

Feb 22, 2011 | 2002 Oldsmobile Intrigue

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My 2000 Park Avenue Ultra knocks when you first start it up, but goes away after it warms up. It is also leaking antifreeze. Do you know what may be wrong?

Late model GM cars are plagued with antifreeze leaks around the Upper Air Plenum gasket and also the Lower Intake Manifold gasket. This is brought on by Dex-cool antifreeze deteriorating the gasket materials. If the Lower Intake gasket is leaking, it may have contaminated your loil with antifreeze. If there is antifreeze in the oil it should show up on the dipstick as a gummy sludge. GM has issued Technical Service Bulletins to their dealerships concerning this issue. Check with your local dealership to see if they will repair it at no charge. There currently is no recall, so they probably won't. In that case, take it to a good garage and have it repaired. Don't wait too long. If the oil is contaminated, it will damage your engine from lack of lubrication.

Dec 21, 2010 | 2000 Buick Park Avenue

1 Answer

I have a 2001 chevy malibu with 3.1 v-6 i replaced lower intake gaskets at 90,000 miles now at 168,000 i have oil in my antifreeze. also when i replaced lower intake gaskets i flushed cooling system and...

Dexcool does not cause leaks, but it should not be mixed with other antifreeze. Is it possible that the oil in the antifreeze is transmission fluid from a worn out radiator? The radiator cools the engine and the trans, and internally , the radiator may have ruptured?

Dec 11, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

I have a 91 f-150 with a 5.8 engine it uses antifreeze i have had the heads crack checked and gaskets replaced and it doesnt leak it and it runs great any idea how it could be burning antifreeze it started...

If your water ports are in the Intake manifold, it would be possible to crack the casting with a mounting stud. If you were to remove the mounting studs for the throttle body there is a chance the stud would show staining from the Antifreeze.

You need to pressure test the cooling system with a Radiator pump. You may be able to get a loaner from Autozone or Oreillys by leaving a deposit. When the Radiator is pressurized on a warm engine. the thermostat will be partially open and the Intake water jackets should pressurize too! There can be pressurization from the lower Radiator return hose on a Cold engine test as it is a closed system, but you could have an air pocket in the Intake. The air would have to bleed out before you had flowing Antifreeze.

In either the Warm or Cold test of your Radiator, the Pressure would drop in the gauge as you have a hole in the system. You should also be able to tell by looking at the sparkplugs to see what it is they are burning.

You may be able to stop the leak with a good leak sealer. If the leak is in the Intake, the induction system is evenly(?) spreading the Antifreeze to all 8 cylinders and the valves are keeping high pressure away. It is not a combustion chamber leak.

The more modern stop leak products can cost about $16. You add this product, run the engine, then drain the Radiator and put in fresh Antifreeze. Its that potent. Or you can go to a Salvage yard and get another Intake manifold. I hope you have found my solution helpful.

Dec 01, 2010 | 1991 Ford F150

3 Answers

There is smoke coming from under the manifold area i can't see any visible leaks but i have noticed there is a nasty smell of antifreeze as well. The low coolant light is on but there is enough coolant in...

have your cooling system pressure tested, that should give a place to start as to where the leak is and how much it is going to cost to have the problem fixed

Oct 21, 2010 | 1993 Oldsmobile Cutlass Supreme

1 Answer

Can a bad intake plenum leak antifreeze into the engine on a 2002 century 3.1?The computer code was misfire #1 cylinder. Complete tune-up done, same problem, new#1 injector, same problem. Now the coolant...

I see a lot of lower intake gasket leaks on these but usually you get an external leak or you'll find coolant mixed with the oil, not a misfire. Upper plenum is dry on the 3.1 and just bolts onto the top of the lower intake. We usually apply pressure to the cooling system overnight with the spark plug removed from the misfiring cylinder. If there is coolant in the cylinder come morning then you only have to figure out where it is coming from. If the plenum is removed during the test you might be able to see where the coolant is or isn't coming from with a borescope by looking down the intake runner.

Jun 01, 2010 | 2002 Buick Century

1 Answer

Identify antifreeze leak behind engine; in front of firewall

there is a coolent tube runing under the lower intake manifold it will leak or bust open it comes right out the back in the water delivery unit get you book and pull the upper manifold and you should be able to see the problem if it is pull the lower and repair the tube.

Feb 24, 2009 | 1992 Toyota Pickup

2 Answers

2000 chevy impala ls - oil spray under hood inline with serpentine belt

You may have a lower intake manifold gasket leak (or a head gasket leak-slightly less probable) the lower intake can leak onto the serpentine belt and fling oil (and/or antifreeze). The lower intake manifold gasket is usually the culprit here. There is much information about changing it if you are inclined to do it yourself. If not, expect around 800 to 1200 to fix at dealer/mechanic. This is usually accompanied by (but not always) oil in the antifreeze, or antifreeze in the oil...

Jan 18, 2009 | 2000 Chevrolet Impala

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