Question about 2000 Pontiac Montana

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My check engine light is on and the vehicle is not running smoot

I just had a head and gasket replace on the van and one cylinder done. this is a 2003 montana van. the van is now having promblems running smooth. the light wont go away ant i have3 a huge loss of power. what can i do

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Have the code read to help you diagnos the problem. You can do this for free at advance auto. Need to find out what made the check engine light come on. It will not go off by itself and must be reset using the scan tool.

Posted on Jun 04, 2009


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2 Answers

Water in the oil

Radiator coolant in the engine oil is normally an indication of a failed cylinder head gasket or a crack in the cylinder head or both.

Running the engine in an overheated condition will cause head gasket failure and often a crack in the cylinder head.

The problem you have is coolant is escaping into the engine's lubrication passages via the failed head gasket or head crack and contaminating the engine oil. If not fixed you will cause further damage to the engine as oil contaminated with radiator coolant cannot adequately lubricate the engine.

Running a leak down test on each cylinder will confirm the leak. In this case you are going to need to have the cylinder head removed and thoroughly checked for cracks and any warpage as well as a new cylinder head gasket fitted. The condition the engine block surface will also need to be checked.

Jun 14, 2016 | Cars & Trucks

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I recently changed the head gasket after overheating. The car is not starting and emitting heavy smoke

How hot did the car get before you had to change the head gasket? If the car had extreme heat then it could have damaged the rings. The rings will collapse and allow oil to squeeze past and burn out of the exhaust causing the smoke. Also since the rings are collapsed the vehicle will have no compression hence the no start. First thing is do a compression check.

Apr 27, 2016 | 2001 Mitsubishi Lancer Cedia

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Ticking & white smoke after replaced intake gasket

Sounds like coolant getting into the combustion chamber. Potential causes in order of significance: Intake manifold gasket (might not have been done right), Head gasket(s), cracked cylinder head, or, cracked engine block. Check the oil. If it looks like chocolate milk it means the coolant and oil are mixing

Dec 30, 2013 | 1998 Chevrolet Astro Van

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Overheating engine

check coolant level in the radiator. Check radiator fins condition. Have a coolant system pressure test done to check for leaks. Have a flow test done on the radiator to check for blocked cores. Have a compression test done on the engine to check for head gasket or cracked head/s. Check that the fans(Electric or viscous hub ) are working. Run fault codes and check for problems that affect the tune of the engine. Check the cat converter is not blocking the exhaust. Check and test the thermostat for correct operation. That can be done by starting a cold engine and within 10 minutes of idling the top radiator hose should start to feel warm indicating that the water is circulating

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Car overheated now wont start

If you have had the vehicle hot then I would suspect that you will have a breached head gasket at the very least depending on how hot it was and for how long. You may have damaged other component of the engine as well. Remove the spark plugs and inspect for water on top of the pistons or rotate the engine with the spark plugs removed and watch for water purging from the cylinders. If there is water present then you need to have the head gaskets replaced and the cylinder heads checked by a reputable machine shop for cracks. Other components of the engine should also be checked for damage such as the piston rings.

Jul 10, 2013 | Ford Windstar Cars & Trucks

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I turn my van off and when I get back in the van will not turn over it does not make a sound

Check the battery and all power and ground wires and than check the starter you should fine your promblem.

Dec 04, 2011 | 2003 Pontiac Montana

3 Answers

Have availiable a 98 villager with water in the oil suspect water pump falure / overheat and warped head blown head gasket engine runs smooth labor to replace head gasket waterpump and true heads cost...

$1000 plus the costs to do head gaskets, bearings (remember, antifreeze in the lubrication system means cam and crank bearings), you are talking about a rebuild, since it's out and apart you may as well do the rings too (150,000)...align boring, deck the block, heads...with the misc. items you will end up doing, you might be better off looking for a low mileage junkyard engine instead of going through that one.

May 28, 2011 | 1998 Mercury Villager

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We have an 2002 Aztec 3.4 litres engine, never a problem with it since we purchased it new in late 2001 until recently while pulling a trailer it blew the head gasket.

very common, we see head gaskets and cracked cylinder heads all the time, they do offer a heavy duty radiator for this van it would be a good idea if you are going to tow with this van.

Nov 18, 2010 | 2000 Pontiac Montana

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