Question about 2002 Pontiac Montana

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The mechanic says i need a new lower intake gasket (at a cost of $1500 CDN) - can i just keep replacing the coolant as needed or is the vehicle (2002 Montana) unsafe to drive? thanks

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First off, no you cannot just keep replacing the coolant. If coolant enters the engine lubrication system it will destroy the engine. You must have this repaired. But $1,500 is an outrageous charge for this repair. Find you another honest mechanic to repair this vehicle. This mechanic is ripping you off.

Posted on Aug 27, 2010


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How do i stop a leak from intake manifold gasket?

Please take your vehicle to a qualified mechanic. A leak in the intake manifold gasket can cause catastrophic results not only are you losing coolant to the outside but may also be leaking coolant internally which could contaminate the oil and cause the engine to fail due to loss in lubricating properties. Also, if not torqued properly you may have a warped intake manifold. Please see a good mechanic it may cost more but you risk a much larger cost to replace an engine

Aug 03, 2016 | Cars & Trucks

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I've got a 2002 Buick LaSabre. Firewall looks gets hot on short run. I do have small leak brake fluid. Could that be the problem?.

That would not cause the engine to get overheated. It may be too late to save your engine, but check if you have coolant loss and brown sludge on the oil dipstick, or if under the oil fill cap there is a milky brown substance. This is evidence of coolant getting into the oil. This engine in LeSabres has a common problem of intake manifold gasket failure, leading to loss of coolant that winds up in the cylinders and into the oil. If not driven much or if the engine did not get too hot, the cylinder heads and head gaskets may not have been ruined, but if overheated badly, the engine may be a total loss.

The intake on the engine is two parts: an upper intake manifold that is plastic (and just waiting to fail-many owners have had to replace this) and an aluminum lower intake manifold. The gaskets under the lower manifold are the ones that develop leaks. Because GM used inferior factory gaskets (also made of plastic) as a cost-cutting measure. They took a very good engine, well known for durability, and shaved costs with inferior gasket material-go figure.

Dec 06, 2014 | Cars & Trucks

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Gas fumes getting into car, problem being corrected, further inspections shows drive belt and tensioner need replacing, center link on idle arm to replace,coolant leaking so lower intake gasket needs...

Replacing the belt and tensioner is fairly easy and shouldn't cost to much. At least replace the belt if the tensioner is decent. Nothing is worse than having a belt break on the road and being stuck. As for AC, that's really up to you on how hot you like it. :)

The center link on the idler arm would be a good idea in time. You could wait for a while, but don't compromise your steering and handling to much.

As for the lower intake gasket you could run into big problems down the road. GM put a plastic type gasket into these 4.3L motors and they fail all the time. Even at low miles like you have. The problem is you might just be leaking coolant outside the engine block for now, but the gasket could fail and get coolant inside the motor and cause much more problems when mixing with oil and possible engine failure.

Good luck! Let me know if you have other questions. I just replaced a lower intake gasket on a 2001 GMC Jimmy a few months ago.

Oct 05, 2011 | 2001 Chevrolet Blazer

1 Answer

Over heating 2002 Aztek First mechanic we took it to: replaced intake manifold and water pump, flushed system because dex-cool coolant had caused damage. Still over heated. Same mechanic said it was the...

If the water pump and thermostat have been replaced and the system has been properly refilled and bled , the only thing left is the radiator. If coolant is not flowing through it properly , vehicle will run hot. If your car has overheated to the point of boiling over , your new thermostat may now be damaged again.. As for the fans , they only come on when the coolant reaches a certain temprature. Under normal driving conditions , they would not need to come on while the vehicle is moving , as the air flow from driving down the road would be enough to cool the engine.

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How many intake manifolds does a 1998 buick park avenue have? Also is this a difficult job to do? I have heard these cars are notorious for melting there intake manifolds, is there a metal replacment of...

2 upper pellum and lower intake gasket( both are called intake gaskets) I did it. time consuming alittle but if your ave or above with mechanics then you'll save yourself $2000.. the new pelunum and gasket cost $130 and it comes with improved gasket and a replacement pipe the melts also. lower gasket $40? need more help or info email me! Richie

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2002 Chevy Impala low coolant light is on constantly. Even when car first starts and stays on. After about 10 miles car shows the water gage moving up to overheat. When I turn on the heater siometimes it...

This is usually the lower intake manifold gasket. The problem you are describing is due to a large air gap/bubble in your cooling line. This usually happens when the manifold gasket begins to fail.

You can add coolant, and bleed the coolant system (make sure to get out all the air to eliminate the no heat/overheat problem), but unless the lower intake manifold is fixed, it will probably contunue to leak (it can be a very very hard to detect leak). There are UV dyes u can add to the aNTIFREEZE TO CHECK FOR LEAKS THAT AREN'T OBVIOUS. But the worst case for this is that coolant gets in to the oil, and can ruin your engine. Check your dipstick for milky, creamy oil, a sign that there is coolant in the oil. Get it fixed immediately if this is the case, or you will ruin the engine.

There's info online about doing it yourself, but it's a bit invlved if you are not a mechanic. Expect to pay from 800 to 1200 to get it fixed at dealer or mechanic.

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1 Answer

High Idle

I have a 2001 Nissan Altima and mine did the same thing. We replaced the intake gasket. It costs around $5.50, but it requires several different kinds of tools. We spent over $100 in special sockets, etc. But once you replace that gasket, it will idle better.

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2 Answers

Oil in over coolant tank

If there is oil inside the coolant liquid that is the head gasket.

Check first if oil can leak into the coolant tank from the cap.

Usually when you get oil into the coolant liquid you have an head gasket problem, do a compression test, or buy the home tester below. Guides - HOW TO TEST FOR A FAILED HEAD GASKET
Head Gasket or Combustion Leak Test Procedure (Gasoline Engines Only)
Blown Head Gasket? how to check

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that is a common problem with upper intake ..when starts going bad usually you will have excessive white smoke out exaust pipe or check oil on the dipstick for milky color oil . if it gos bad it will cause the motor to hydro lock. thats when antifreeze gos into the clyinder causing the motor to lock up.. and as cost most places charge $1100 to $1500 for that repair..most of the time you wont see a leak because it leaks inside the motor. hope this helps

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1 Answer

Intake manifold -rt side-leaking outside -now leaking inside

Sounds like you need a intake manifold gasket replaced it will cost you a couple hundred to have someone do it for you but if you have mechanical ability you can do it yourself if the coolant is in the oil you will want to get it done very soon because the coolant will wash the bearings in the lower end then costing you alot more. any other questions just ask.

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