Question about 1992 Isuzu Pickup

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2002 buick century

Seems like lately shes losing power it once had im not sure what it could be possibly exhaust leak from manifold?

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A buick Isuzu, huh.
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Posted on Jun 01, 2014


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Posted on Jan 02, 2017

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SOURCE: stripped threads in engine block for exhaust manifold

You need a heli-coil kit. Your local parts store should be able to help you find the proper size if you take the bolt with you. Follow the directions carefully and buy a new bolt for the manifold.

Posted on May 28, 2010

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My 1999 Buick Regal climate control puts ac out defrost, mid , and floor all the time on auto or manual

There is a vacuum hose that is no longer connected to the engine intake manifold.

Aug 22, 2016 | 1999 Buick Regal

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I have buick 2003 century 3.1L it started running weird and losing power up hills and seemed like it wouldnt shift right and had poor gas mileage. The check engine light came on once briefly. Scanned it...

Check EGR valve to make sure their isn't a piece of carbon stuck under valve seat. Also you need to check exhaust back pressure to make sure you don't have a converter pluged.

Jul 09, 2014 | 2003 Buick Century

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What are the symptoms of a bad intake gasket on a 1999 buick century?

Coolant leaks,When the intake manifold gasket cracks or blows out, coolant will leak out of the intake manifold. You may see puddles underneath your car or notice smoke or steam coming off of the engine and exhaust from the coolant dripping onto it and then burning.Overheating, If the intake manifold gasket fails and allows coolant to leak out into the engine, your car will begin to overheat. If your car frequently runs low on coolant or begins to overheat, check the intake manifold gasket.Running poorly, When the intake manifold gasket falters, it affects the way the motor handles its emission gases. The change in pressure can affect the vacuum in the intake as well as how smoothly your car runs. Mainly, it will idle roughly and may hesitate, cough or sputter.

Oct 27, 2013 | 1999 Buick Century

1 Answer


Tightening sequence would be to tighten from the center most bolts to the outer most bolts.
Intake Upper Bolts = 18 lb.ft.
Intake Lower Bolts = 10 lb.ft.
Exhaust Manifold Nut = 12 lb.ft
Exhaust Manifold pipe = 22 lb.ft.
Exhaust Manifold Heat Shield = 18
Rocker Arm Torque Nuts = 18 lb.ft.

Hope this helped you ?? if you need more info, get back to me.....

Jun 16, 2011 | 1994 Buick Century

1 Answer

I have a 2002 Buick Century 3.1 l engine that comes back with a P0446 code. does anybody know what this means and what the cure is ?

That is an EVAP code (gasoline vapors from the tank)
Make sure the gas cap is on ,could just be a line or hose leaking (not gas just vapor).Careful inspection of the vapor lines may find it.
There is a small green cap on a black plastic line under the hood,should be somewhere near the front valve cover ,top of intake manifold.If you blow smoke into the testport you may be able to find it that way.

Mar 03, 2011 | 2002 Buick Century

1 Answer

: where is the thermostat located on a 2002 buick century custom

For 2002 Buick Century 3.1L SFI OHV 6cyl


Fig. The thermostat on this 3.1L is mounted horizontally and uses an offset housing/water outlet

  1. Disconnect the negative battery cable.
  2. Partially drain the cooling system into a suitable container, to a level below the thermostat.
  3. It is usually possible to leave the radiator hose attached and simply remove the thermostat housing (also called a water outlet) and flex the radiator hose enough to service the thermostat. It is good practice, however, to remove the radiator hose so the thermostat housing can be given a thorough cleaning. Debris on the thermostat housing sealing surface can cause leaks.
  4. Some applications may have electrical connections to sensors which mount in the thermostat housing. Use care when detaching these connectors.
  5. Unfasten the thermostat housing bolts and remove the housing.
  6. Remove the thermostat by simply pulling out. Discard the gasket.
To install:
  1. Clean all parts well. Make sure the sealing surfaces on both the thermostat housing gasket flange and the intake manifold are clean and free of corrosion damage. It is good practice to run a thread cutting tap or a clean bolt into the threaded holes in the manifold to clean out old sealer and dirt. The threads should be clean so the thermostat cover clamps the gasket evenly at assembly.
  2. Position the thermostat in the intake manifold. Make sure it is seated.
  3. Position a new gasket over the thermostat. If no gasket is used, apply a 0.125 in. (3mm) bead of RTV sealer to the thermostat housing and install the housing. Lightly lubricate the bolts with clean engine oil. Torque to 18-20 ft. lbs. (23-27 Nm).
  4. If removed, attach the radiator hose to the thermostat housing.
  5. Refill the engine with the proper mix of DEX-COOL®and water. Connect the negative battery cable, start the engine and check for leaks.

Good luck (remember to rate this answer).

Jan 11, 2011 | 2002 Buick Century

3 Answers

Exhaust makes a loud tick when first started

usually an exhaust leak, at exhaust manifold to head, broken stud maybe. Use a piece of hose to your ear and listen at manifold.

Dec 06, 2010 | 2002 Ford Mustang

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Where is the 02sensor located on a 1993 buick century?

on the exhaust manifold right above where the exhaust pipe meets the manifold front of car . see picture below ..(Oxygen Senor)

Oct 16, 2010 | 1993 Buick Century

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Looking for the egr valve on my 2001 buick century. My car cuts-out and doesnt seem to get enough gas when driving

It is Located Top of Engine With a Black Plastic Cosmetic Covre on it and a Steal FLEX HOSE Going Down to Exhaust Manifold.

Sep 22, 2010 | 2001 Buick Century

1 Answer

The oil light im my 98 buick century is on, the

Chech oil. If it has coolant in it you may need to replace the intake manifold gaskets and lifters, if you have not ruined it already.

May 15, 2010 | 2002 Audi A4

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