Question about 2003 Buick Century

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I need an engine diagram of 2003 Buick Century 3.1. To replace a blown head gasket.

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The best thing to do is go to the library.They have service manuals there you can just check one out.They are not the factory ones but they have all the information you need to do the job.Good luck.

Posted on Nov 18, 2009


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Are there any known problems of head gaskets on 1997 buick century

Aaron, there has been a few problems with head gaskets, the bigger problem was with the intake manifold gaskets.
Check the attached links,
" I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Intake Manifold Gaskets May Leak Coolant or Engine Oil Buick Century...

Coolant Leaking From Intake Gaskets GM 3 1L 3 4L

Thread how do tell if my headgasket or intake gasket is bad

1997 Buick Century Blown Head Gasket

Mar 13, 2016 | Buick Cars & Trucks

1 Answer

Why my 2003 buick century runs fine for a couple days then starts overheating ,

if opening the bleed screws lets air out and you do if often ,that indicates a failing head gasket and compression gas is getting into the cooling system
have a compression test done to check for head gasket /cracked head

Aug 22, 2015 | 2003 Buick Century Custom

1 Answer

Car running hot

Probably a cracked cylinder head or block, or both. Or the head was warped and the head gasket has blown again.
When the engine gets very hot the gasket expands, and after a few times it will not return to its original shape.

Jul 04, 2013 | 2001 Buick Century

1 Answer

My 1997 Buick Century has been over-heating and running rough for a couple of weeks. I had to keep filling my coolant reservoir every 2 or 3 days. I just had a hunch and checked my dipstick and it's very...

Sounds like a blown head gasket. The head could also be cracked. If the engine hasnt been badly overheated to the point wherethe bore and rings have glazed it should be ok to replace the gasket. the head should be resurfaced and pressure tested before it is refitted. If it is a high milage engine that is burning oil I would sugest replacing the engine or if the car isnt in cood general shape selling it as is as spending large amounts of money on an engine in poor condition would be pointless.

Feb 19, 2011 | 1997 Buick Century

1 Answer


Most likely a blown intake gasket. Could also be a bad head gasket.Engine will have a mild to severe miss if head gasket is bad.The 3.1 engines are known for this,

Feb 12, 2011 | 1994 Buick Century

1 Answer

Does 1992 buick century need thermastat to run properly? If it does what are the side effects of not having one in?

YES it does need a thermostat to run proper, which is why they are installed.
side effects are poor fuel economy , and not enough time to cool the heated water, which will overheat your coolant and then the engine. if your lucky it might not crack your cylinder heads, and maybe it wont blow your head gaskets. BUT . 20 bucks for a thermostat , or owning a useless car with blown engine ? your choice

Jul 31, 2010 | 1992 Buick Century

1 Answer

Oil droplets in engine coolant. Mileage about 100000 on 2002 V6 Buick Century.

Replace the head gasket. Don't wait any longer if you can or the engine may overheat and warp the head.

Jun 01, 2010 | 2002 Buick Century

2 Answers

2003 Buick Century is over heating in the morning only. Radiator, thermostat and sensor have all been replaced. Water pump and fans have been checked. When it idles it gets hot but when you rev the motor...

Sounds like the intake gasket or even possibly the head gasket have gone south if everything else has been replaced. Internal engine leaks will cause engine to overheat very easily.

May 19, 2010 | 2003 Buick Century

1 Answer

Hi I kneed the torque spec'a and sequence for the head's on 3100 searies 1999 buick century engine and the plenum thanks

how to find out the torque spec for 1998 buick century 3100engine.i just did a intake gasket switch and i had to loosen the valves to get the gasket out now i need to know what the spec is.

Dec 30, 2009 | 1999 Buick Century

1 Answer

No pickup, engine overheating, (coolant level ok) poor gas mileage. Maybe clogged fuel injectors?

Do a compression check on the cylinders. They should all be within a couple of psi of each other. If one or more are reading 10 or more psi higher than teh rest the head gasket is blown or you have a craked block or head.

Sep 08, 2009 | 2003 Buick Century

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