Problem Reports
Buick Century
Report: Intake Manifold Gaskets May Leak Coolant or Engine Oil
Buick Century Problem
Model Years Affected: 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Engines Affected: 3.1L V6, 3.3L V6
Average Mileage: 97,917 mi (30,000 mi - 277,684 mi)
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.
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Report #1Visitor, 2002 Buick Century, 106,000 mi
small coolant puddle under upper intake manifold(plenum)
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Report #2Visitor, 2003 Buick Century, 30,000 mi
oil in coolant
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Report #3Visitor, 1998 Buick Century, 94,000 mi
coolant is leaking
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Report #4Visitor, 1992 Buick Century, 3.3L V6, 79,000 mi
I just found out that from a repair tech that my intake manifold is leaking both coolant and engine oil.
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Report #5Visitor, 2005 Buick Century, 107,000 mi
Intake Gasket replacement
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Report #6Visitor, 1994 Buick Century, 3.1L V6, 110,000 mi
just got from older couple 2 month ago it has coolant leak and all so oil nothing to serious yet i keep stuff checked runs real good
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Report #7Visitor, 2003 Buick Century, 65,000 mi
intake manifold gasket needed replaced
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Report #8Visitor, 2000 Buick Century, 105,000 mi
low coolent light on also check engine light coolent on floor but when driving and thempure gage reads half way low coolent light goes off and no coolent will drip out
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Report #9anydream7, 1998 Buick Century, 3.3L V6, 50,000 mi
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Report #10Visitor, 1999 Buick Century, 90,012 mi
I had to intake gasket replaced
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Report #11jonmil, 2003 Buick Century, 3.3L V6, 70,000 mi
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Report #1272Machi, 1999 Buick Century, 80,495 mi
RookieCollant leaking at rear of block between intake manifold and top of block between the lower part of the heads... slow at first then enough to trip the low coolant light... can't wait much longer to repair.
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Report #13Visitor, 2002 Buick Century
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Report #14Visitor, 2003 Buick Century, 33,000 mi
After driving on highway for some time, when I stopped and let the car idle the temp gage went up to 3/4. Had problem with air took to dealer and they found it and repaired at no cost.
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Report #15Visitor, 2000 Buick Century, 45,000 mi
Repaired by replacing intake manifold gaskets -- $1200.00
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Report #16medrumm, 2000 Buick Century, 3.1L V6, 34,000 mi
Rookiereplaced intake manifold gaskets
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Report #17charliepal, 2001 Buick Century, 3.1L V6, 78,000 mi
RookieGoing to have intake problem repaired along with new antifreeze. Price quoted $550--six hours labor.
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Report #18Visitor, 1998 Buick Century, 128,800 mi
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Report #19Visitor, 2003 Buick Century, 3.1L V6, 155,000 mi
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Report #20Visitor, 1996 Buick Century, 3.1L V6, 150,000 mi
coolant in oil probably the manifold
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Report #21Visitor, 2004 Buick Century, 3.1L V6, 79,000 mi
no heat, and puddle of antifreeze
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Report #22Visitor, 2002 Buick Century, 3.1L V6, 72,000 mi
leaking oil into the radiator
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Report #23Visitor, 1999 Buick Century, 76,000 mi
Gasket went because it was plastic had engine rebuilt cost alot of money. just because Buick wanted to save some money
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Report #24Visitor, 1998 Buick Century, 196,000 mi
Gasket leak resulting in over heating,and burning coolant. Cost of repair was estimated at $1600. Car not worth fixing
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Report #25Visitor, 1997 Buick Century, 277,684 mi
LOSING COOLANT, SAW DRIPPING AREA OF WATER PUMP AFTER PRESSURE CHECK FOUND LEAKING TIMING CHAIN COVER GASKET, HAD TO REPLACE GASKETS
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Report #26Visitor, 2003 Buick Century, 3.1L V6, 33,000 mi
When on highway for a while and then run into slow traffic or at idle for a while , temp gage would go up 3/4 way toward Hot.
Had car at dealer for other problem and explained this to service writer and when they checked it out.Flag ThisLike | 1 person likes this1 -
Report #27Visitor, 2000 Buick Century, 3.1L V6, 135,000 mi
head gasket leak suggested by dealer in 2005. have not fixed problem car is still running well.
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Report #28Visitor, 2003 Buick Century, 3.3L V6, 71,453 mi
Bill perric chevrolet not honestly i was got two problems on warranty they was refused it . they be honestly to 1,700 cost est expernsive
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Report #29Visitor, 2000 Buick Century, 3.1L V6, 94,000 mi
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Report #30Visitor, 2003 Buick Century, 3.1L V6, 75,231 mi
The coolant was leaking into the engine. Had to get new manifold gaskets, thermostat, hoses, coolant and oil change.
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Report #31Visitor, 2001 Buick Century, 3.1L V6, 115,000 mi
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Report #32Visitor, 2002 Buick Century, 3.1L V6
The intake manifold gasket failed in my 2002 Buick Century at about 120,000 miles. My neighbor, who owns the same year make and model, also had this failure with about the same mileage. We had them replaced by the same mechanic to the tune of about $1000 each. I have had 4 GM vehicles with the 3.1 liter engine and have ended up replacing the gasket in every one of them at between 100,000 - 120,000 miles. My mechanic said that he sees this problem quite often with the GM 3.1 liter engines.
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Report #33Visitor, 2002 Buick Century, 3.1L V6, 121,000 mi
Same problem that everyone else is reporting. I noticed the smell of coolant after the car came in from a drive for a few weeks. I looked at the engine a noticed a quarter sized puddle of coolant on the block near the thermostat housing. Sure enough, the intake was leaking. My trusted mechanic charged me 800 to make the repair.
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Report #34Visitor, 2002 Buick Century, 3.1L V6, 97,000 mi
oil in radiator, dianose as intake manifold gasket 800.00 repair not yet fixed
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Report #35Visitor, 1999 Buick Century, 145,000 mi
Left me stranded at a rest stop over Christmas Holiday due to overheat because coolant into my oil. Replaced intake manifold gasket for $1100. No more leaks. No problems with since.
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Report #36Visitor, 2003 Buick Century, 3.1L V6, 33,000 mi
After running on highway for a while then getting into traffic where I had to idle for a while temp gage would go up to 3/4 . Dealer repaired at no cost to me.
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Report #37Visitor, 1999 Buick Century
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Report #38Pmonty, 2002 Buick Century, 3.1L V6, 102,000 mi
RookieRIGHT AT 102000 INTAKE MANIFOLD GASKET $1200 TO REPLACE WEEK LATTER CAT WENT BAD $1100 MY LAST GM CAR,,,,TRUST ME
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Report #39nextyear, 2000 Buick Century, 3.1L V6, 112,345 mi
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Report #40Kllopes79, 2000 Buick Century, 3.1L V6, 91,695 mi
RookieProblem not solved.
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Report #41Dana92028, 2001 Buick Century, 3.1L V6, 75,000 mi
Rookieits not fixed. There is no way I can afford $1000 to fix the darn thing and I sure as heck cant afford to buy another car. Thanks GMC ! GMC should have to some how right this wrong. I NEED MY CAR !
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Report #42momo2477, 2002 Buick Century, 3.1L V6
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Report #43Visitor, 1999 Buick Century, 150,000 mi
Quick oil Change place states there is oil in the water reservoir.
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Report #44Visitor, 1997 Buick Century, 155,000 mi
I keep having to add coolant, but there is no leak. yet my dip stick is showing three to four quarts over full.
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