Question about 1990 Oldsmobile Eighty Eight

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1990 Oldsmobile 3800 6 cylinder engine repair

What size are the missing screws that hold the heat schield on the exhaust manifold?

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6 Suggested Answers

zappanut
  • 959 Answers

SOURCE: Stripped out exhaust manifold hole!

the parts store can look it up for ya . They have the books right there.

Posted on Jan 03, 2009

motor1258
  • 6674 Answers

SOURCE: I have a 1994 ninety-eight regency Oldsmobile &

Have free scan for codes done at Autozone or Pep Boys, and go from there. Eliminates guess work & unnecessary parts replaced.

Posted on Apr 26, 2009

  • 4 Answers

SOURCE: 1990 oldsmobile 98 error code 34 MAC

There are 2 problems for code 34. First, is manifold absolute pressure(MAP) sensor signal voltage low. Second, Mass Air Flow (MAF)sensor signal-low airflow indicated.I dont have anything for the MAC.Hope this helps

Posted on Jul 06, 2009

jose_v17
  • 227 Answers

SOURCE: removing exhaust manifold

http://tearstone.com/eclipsefsm/15.PDF
(Click this link)
This is the section of the factory service manual that deals with the disassembly and reassembly of the intake plenum and the exhaust manifold. The posted numbers is the sequence of the disassembly and reverse when you are ready to put it back together. Torque values are also displayed. The exhaust manifold teardown for the 3.0L engine begins on PG. 17
feel free to contact me if you require more help

Posted on Apr 03, 2010

  • 427 Answers

SOURCE: leaking under LH Exhaust Manifold

check to see if bolts are tight.if they are,replace gasket

Posted on Apr 13, 2010

BCAS1298
  • 3092 Answers

SOURCE: '88 cutless 3.8 6cyl. To replace starter remove

You don't have to remove anything but the starter assembly, starter will come out from under the car, flag labor time to do this job is .8 of an hrs.

Posted on Jul 22, 2010

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2001 buick century torque prints for haeds on up


the 3100 specs
Type: Bolt Dim: Length: Head: Hexagon Grade: 37 Ft-Lbs 444 In-Lbs 50.17 N-m Connects: Cylinder Head To Engine Block Years: 1998-2001 Vote Record: Vote Note: 3100 - Head Bolts - 2 Steps: 37FtLbs; +90deg
12 Ft-Lbs 144 In-Lbs 16.27 N-m Connects: Exhaust Manifold To Cylinder Head Years: All Vote Record: Vote Note: 3100 - Exhaust Manifold to Cylinder Head
Type: Bolt Dim: Length: Head: Hexagon Grade: 9.58 Ft-Lbs 115 In-Lbs 13 N-m Connects: Intake Manifold To Cylinder Head Years: All Vote Record: 0/1(0%) Note: 3100 - Lower Bolts - 2 Steps: 5 FtLbs; 9.58 FtLbs Here are the head bolt torques for a 3.8
37 Ft-Lbs 444 In-Lbs 50.17 N-m Connects: Cylinder Head To Engine Block Years: 1999-2005 Vote Record: Vote Note: 3800 II - 2 Steps: 37FtLbs; +120deg
13 Ft-Lbs 156 In-Lbs 17.63 N-m Connects: Exhaust Manifold To Cylinder Head Years: 1999-2005 Vote Record: Vote Note: 3800 II - Exhaust Manifold to Cylinder Head - NOT FRONT 2
7.42 Ft-Lbs 89 In-Lbs 10.06 N-m Connects: Fuel Rail To Intake Manifold Years: All Vote Record: Vote Note: 3800 II - Fuel Rail Mounting Bolts 2.25 Ft-Lbs 27 In-Lbs 3.05 N-m Connects: Idle Air Control Valve To Throttle Body Years: All Vote Record: Vote Note: 3800 II - Idle Air Control Valve to Throttle Body Type: Bolt Dim: Length: Head: Nut Grade: 11 Ft-Lbs 132 In-Lbs 14.92 N-m Connects: Intake Manifold To Cylinder Head Years: All Vote Record: Vote Note: 3800 II - Intake Manifold to Cylinder Head Bolts/Nuts
7.42 Ft-Lbs 89 In-Lbs 10.06 N-m Connects: Intake Manifold Plenum To Intake Manifold Years: All Vote Record: Vote Note: 3800 II - Intake Manifold (Upper) to Lower Manifold Type: Bolt Dim: Length: Head: Hexagon Grade: 14 Ft-Lbs 168 In-Lbs 18.98 N-m Connects: Knock Sensor To Cylinder Head Years: All Vote Record: Vote Note: 3800 II - Knock Sensor

Jul 24, 2016 | 2001 Buick Century

1 Answer

I'm installing a 2.2 in a 2003 Oldsmobile Alero and I'd like to know the torque specs on the Exhaust bolts and studs. Thanks


Exhaust Manifold To Cylinder Head - 9.58 ft lbs
Exhaust Pipe To Exhaust Manifold - 20 ft lbs
you can check it out here, also all other torque specs for your engine.
Torque Specs Database

Feb 23, 2015 | 2003 Oldsmobile Alero

1 Answer

Why do engine over heat ?


Sounds like the cam timing and or ignition timing is retarded, start with checking this. After your have done that, do a head gasket leak test before to take engine a part.

Oct 19, 2014 | 1990 Oldsmobile Cutlass Ciera

2 Answers

Missing on passenger side of engine. Gas floods through and comes out exhaust. Replaced fuel pressure regulator.no change. Checked compression on all cylinders.120 - 190 psi. Dropped exhaust at engine,no...


Its possible that your crankcase is full of gass too, I suggest change oil and filter, also, if it wont go over 40, the converter (catalytic) is probably damaged as well, raw fuel in the exhaust will break up the cat. Oil change is imperitive as too much liquid in the crankcase will destroy an engine in seconds. Can also be caused by the clogged converter, too much backpressure.

Get a vacuum gauge, hook into a manifold vacuum source. Increase RPM to 1500-200 and hold steady, if vacuum gauge falls, exhaust sytem has a restriction, the cat or muffler or a pipe has a broken chunk of the cat blocking it.

Hope helps; keep us updated.

May 29, 2011 | 1990 Subaru Legacy

2 Answers

My car burns gas very fast. where is the 02 sensor located? do i need a calib cabreter?


02 sensors are located in the exhaust the upstream ones are close to the engine in the rear exhaust manifold (for 6 cylinders) and at the front exhaust (for 4 cylinder). The downstream ones are behind the catalytic converter. Check to make sure the fuel pressure regulator on the to of the engine isn't leaking. Replace the air and fuel filter could be plugged. Check the coolant level in both the rad and the reservoir they are notorious for intake manifold and head gasket leaks for 6 cylinders. There aren't many calibration updates for this vehicle relating to fuel consumption.

Jan 30, 2011 | 2000 Oldsmobile Alero

1 Answer

How do i change the starter motor on a 1993 pathfinder


  1. Remove the exhaust manifold heat insulator.
  2. Remove the fuel tube retainer bolt.
  1. On 2wd models with the 6-cylinder engine:
    1. Remove the front right wheel.
    2. Remove the front gravel shield.
    3. Remove the exhaust manifold heat insulator.
    4. Remove the exhaust manifold.
    5. Detach the oil pressure switch connector.
  2. Unfasten the remaining electrical connections at the starter solenoid.
  3. Remove the two nuts holding the starter to the bell housing, then pull the starter toward the front of the vehicle and out.

To install:

  1. Insert the starter into the bell housing, being sure that the starter drive is not jammed against the flywheel.
  2. Tighten the attaching nuts and secure all electrical connections to the starter assembly.
  3. Install all remaining components in reverse order of removal.
  4. Reconnect the battery cables. If applicable, refill and check the oil level. Check the starter assembly for proper operation.



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Starter removal on 2WD-6-cylinder engine






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Starter removal on 4WD-6-cylinder engine


On 4wd models with the 6-cylinder engine:

Remove the front gravel shield.

    1. Detach the oil pressure switch connector.
    2. Drain the engine oil and remove the oil filter.

Jan 19, 2011 | 1993 Nissan Pathfinder

2 Answers

Where are the O2 sensors located on a 2001 oldsmobile sillohette 6 cylinder?


the sensors are located on the exhaust system, theres one screwed into the rear manifold and the rest is on the exhaust system, theres always one before the cat converter and one after and depending on the engine size there will be three to four 02 sensors , your van has two 02 sensors they are both on the exhaust here a diagram to help you.68fa23b.jpg

Sep 09, 2010 | 2001 Oldsmobile Silhouette

1 Answer

Where are the exhaust system bolts located?


Removal & Installation 2.2L Engine To Remove:
  1. Remove or disconnect the following:
    • Negative battery cable.
    • Heat shield.
    • Oxygen sensor.
  2. Raise and safely support the vehicle.
  3. Remove exhaust pipe from the exhaust manifold.
  4. Lower the vehicle.
  5. Remove the exhaust manifold mounting nuts from the cylinder head. chevy_cav_02-04_exmanifold.gif

  6. Remove the exhaust manifold.
  7. Clean the mating surfaces.
  8. Check for cracks, broken flanges and gasket surface damage.
  9. Use a straight edge and a feeler gauge. If the flanges or the mating surfaces do not align, the manifold is warped and should be replaced.
To Install:
NOTE: The manufacturer recommends using new exhaust system nuts.
  1. Install the manifold gasket.
  2. Position the exhaust manifold to the cylinder head. Exhaust manifold 2.2L 87953055.gif

  3. Install the new exhaust manifold nuts. Tighten the nuts starting from the center and working toward the ends to 110 in lbs (12.5 Nm).
  4. Raise and safely support the vehicle.
  5. Install the exhaust pipe to the manifold using a new flex coupler gasket.
  6. Install new exhaust flange mounting nuts.
    • Tighten to 33 ft lbs (45 Nm).
  7. Lower the vehicle.
  8. Install the oxygen sensor.
  9. Install the heat shield.
  10. Connect the negative battery cable.
2.4L Engine To Remove:
  1. Disconnect the negative battery cable
  2. Disconnect the Oxygen (O2) sensor electrical connector.
  3. Remove the (O2) sensor.
  4. Raise and safely support the vehicle. Exhaust brace 2.4L 87953053.gif

  5. Remove the exhaust manifold brace-to-manifold bolt and the oil pan nuts, if necessary. Exhaust heat shield 2.4L 87953051.gif

  6. Remove the upper heat shield. NOTE: Do NOT bend the exhaust flex decoupler more than necessary to remove it. Excessive movement will damage the flex decoupler
    Exhaust flex decoupler 87953056.gif

  7. Remove the manifold-to-exhaust flex decoupler fasteners.
  8. Remove the exhaust pipe.
  9. Carefully lower the vehicle.
  10. Remove the exhaust manifold-to-cylinder head mounting nuts/bolts. Remove the exhaust manifold.
  11. Discard the gaskets and/or seals. Clean the mating surfaces.
To Install:
Exhaust manifold 2.4L 87953055.gif

  1. Install new exhaust manifold gaskets. Position the exhaust manifold on the cylinder head. Tighten the mounting bolts in sequence to 110 in lbs (12.5 Nm).
  2. Raise and safely support the vehicle.
  3. Install the exhaust manifold heat shield. Tighten the mounting bolts to 10 ft. lbs (14 Nm).
  4. Install the exhaust manifold brace-to-manifold bolt and the oil pan nuts. Tighten the mounting bolts to 41 ft lbs (56 Nm) and the nuts to 18 ft lbs (24 Nm).
  5. Position the exhaust pipe to the manifold. Install the manifold-to-flex decoupler mounting bolts. Tighten to 26 ft lbs (35 Nm).
  6. Lower the vehicle.
  7. Coat the threads with a suitable anti-seize compound and install the O2 sensor.
  8. Connect the O2 sensor electrical connector.
  9. Connect the battery ground cable and check for leaks.
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Sep 02, 2010 | 2000 Oldsmobile Alero

1 Answer

Where is the front oxygen sensor located on my 2001 Olds Alero having a 4 cylinder engine.


Under hood , center, rear engine area, above exhaust pipe flange, mounted in exhaust manifold. May be behind a heat sheild that will have to be removed.

Jun 23, 2010 | 2001 Oldsmobile Alero

1 Answer

Need a diagram for the area of the hermostathousing and water outlet 4 cylinder,we think something is missing


THERMOSTAT HOUSING IS LOCATED NEAR THE EXHAUST MANIFOLD.YOU HAVE TO REMOVE THE EXHAUST HEAT SHIELD TO GET TO IT.YOU WILL SEE THE THERMOSTAT HOUSING WITH COOLANT INLET PIPES GOING TO IT.

Mar 31, 2010 | 1999 Oldsmobile Alero

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