Question about 1998 Buick Park Avenue

1 Answer

1998 Buick Regal intake manifold leaking coolant into cylinders. Need information on how to take apart and repair. Thanks, MB

Posted by on

  • Anonymous Jan 13, 2009

    99 regal will not start due to intake manifold

  • Anonymous Jan 13, 2009

    1999 buick regal will not start due to intake manifold leaking into cylinders



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 12 Answers

Hello I just took it appart in 2 and a half hours..I am a novice/ametur mech....You have to first unplug all your wires to the fuel rail/altinators/fuel lines/clips all around the top of the engine...Remove altinator/carefuully remove the coolant housing and adjustment pully/then remove a few brackets with the ten mm socket...You then take off the 10 bolts holding the black plentum/then u will see the 12 bolts holding the intake...You remove those and 2 hidden bolts in the intake and BAM she is out..!!!
If I skipped a few things they are self explainatory...Basically unhook a line here.....disconnect a small plug there....VERY EASY GIG i recomend all to do it.!!!!!!!!!!!!! ME 32 yrs old and 2 and a half hours and a bucket of sockets and 100$ For top and bottom gaskets..Both of mine were shyt


Posted on Mar 26, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

99 Buick Regal LS Water from Radiator Went Through to the Oil Pan

Call a Mechanic proficient and experienced of Buick Cars.

Apr 26, 2014 | 1999 Buick Regal

1 Answer

2001 Buick Regal keeps stalling and running rough has white smoke coming out of tail pipe

The upper intake plenum is leaking coolant into the cylinder heads. The head gaskets on this motor are awesome. So, chances are it's the upper intake plenum. You can check this, by removing the vacuum hose that runs between the upper plenum and the brake booster. Stick your finger in and try to touch the top of the lower intake manifold. If your finger is wet it the upper plenum. You might as well replace the lower intake gasket while you're performing this work because they are prone to failure also. Use a shop vac to pull any coolant out of the cylinder heads. Get brand new spark plugs because the old ones are probably fouled. Once you get the plenum and gaskets replaced, remove your fuel pump relay and leave the spark plugs out and turn the engine over repeatedly for about 10 seconds to push any excess coolant out of the cylinder heads. Then, put the spark plugs in and turn the engine over for 10 seconds again. This will burn excess fuel as coolant out. Then, replace the fuel pump relay to allow fuel to be pumped into the heads. Car will smoke for a few when it fires up, but will clear out quickly. CHANGE THE OIL! Twice within a week if possible.

Jul 23, 2012 | 2001 Buick Regal

1 Answer

What is a vaccum leak on a 1999 buick regal

All engines have vacuum created in the intake manifold, because the pistons are pulling in air into the cylinders from the intake manifold, resulting in a pressure drop in the intake. A leak is caused when the intake manifold gasket is bad, or when a vacuum hose off the intake becomes disconnected or breaks. The hose will then **** extra air into the intake, causing a higher than normal idle, maybe a rough running condition, and can be identified by a slight whistling noise at the break or at the disconnected end of the vacuum hose.

Feb 20, 2012 | 1999 Buick Century

1 Answer

I have a water/antifreeze leak below the thermostat of 1996 buick regal 3.8L and can't see what is leaking or why?

its sounds like a intake manifold gasket...these cars are know for this an they leak coolant at the corners of the gasket around the thermostat or it is a front engine cover leaking...u need to have a coolant pressure test done on this to make sure since these repairs can be expensive

Jul 14, 2011 | 1996 Buick Regal Olympic Gold

1 Answer

Have a Buick regal with 3.8 had coolant #6 cylinder. Broke it down and replaced heads, gaskets, still leaking and intake manifold has no cracks. What is the problem.

a hairline crack in the piston wall. the next time you break it down you will need MAGNAFLUX (a blue dye that is reflective under black light) and a black light...wipe the maganaflux on the entire cylinder wall then illuminate it with a black light. the slightest crack in the metal will stick out like a sore thumb.

Oct 21, 2010 | 1998 Buick Regal

1 Answer

Intake Manifold has leaked coolant into cylinders and locked engine. What would be the cost to repair this - new gaskets etc

This one is a little different and harder to you said it has locked the engine....this is called hydraulic lock and is due to water NOT being if the engine is locked what further damage has this caused ?????

I have seen conrods bent and vales damaged due to hydraulic lock......I would suggest having the cylinder head removed at least to inspect.

If somone advises you that all you need to do is to replace intake manifold gasket, and let the engine sit for a few days as the coolant drains out of the cimbustion chamber, they are offering you ill advice, and you should be wary.........

Oct 06, 2010 | 2001 Buick Regal

1 Answer

Car runs fine for a while the cuts off without warnig must cool off for 15 or20 minuits before it will restart 1993 buick regal 3.1 engine

I have seen that problem occur when the engine heats up, developing pressure in the cooling system and antifreeze leaks out into the air intake or cylinders. This might be a blown head gasket or coolant leak in the intake manafold.

Jun 01, 2010 | 1993 Buick Regal

1 Answer

Head gasket

These cars do not have head gasket problems you need to remove the sparkplugs to get the coolant out and replace the black upper intake manifold as they will leak coolant into the combustion chamber. Common problem.

Apr 21, 2010 | 1998 Buick Park Avenue

1 Answer

Need to remove and replace the intake manifold gaskets on a 2000 Buick Regal GS, with 3.8 Ltr Supercharged engine. The engine is leaking coolant from below the intake manifold.

it is a great deal of work. The molded gaskets breakdown with time. You'll want to change the two 90 degree elbows as well - they are available from a dealer for a reasonable price. Also, the blower gasket is likely shrunk up and /or blown out. And you might as well replace the valve cover gaskets too as they leak oil as they breakdown with heat and time.

I did all of this on mine. Even as a professional, it took me a good 6 hours.

Sep 30, 2009 | 2000 Buick Regal

1 Answer

Coolant leak

This engine has a plastic intake, jsut inside of the throttle body is a tube that comes from the EGR. It will burn through the plastic into a coolant passage located inside of the intake. You will need to replace the intake manifold and if you want there is a revised lower intake manifold with a slightly smaller diameter tube to prevent future burn through that will prevent a reoccurance. However, it is a costly repair for what is a infrequent failure. I suggest just replacing the upper intake manifold. They are now available through the aftermarket.

Jul 09, 2008 | 1998 Buick LeSabre

Not finding what you are looking for?
1998 Buick Park Avenue Logo

459 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides