Question about 2002 Buick LeSabre

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Low oil pressure after heads replaced

Had blown head gaskets, replaced engine gasket set, heads, valve covers, egr, o rings, thermostat, lower and upper manifolds, heads machined, fluxed, new valves,flushed radiator, oil change, new water pump, plugs, wires, disasembled to shortblock, follewd torque specs with rfequired componants, why does it say low oil preeure/no reading???

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  • Buick Master
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Was the oil changed? Has the low pressure been verified with a mechanical test gauge at the oil pressure sending unit pressure port? Do that 1st before assuming the pressure is low.

Posted on Feb 21, 2012

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6ya6ya
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Posted on Jan 02, 2017

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demonsm
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SOURCE: the egr tube enters the upper manifold via what

My wifes just poped out and back in,

Posted on Mar 14, 2009

  • 617 Answers

SOURCE: intake manifold bolts torque and rocker arm torque

Intake Manifold Coolant Pipe Bolt .... 89 in lbs (7.4166 ft. lbs)
Lower Intake Manifold Bolt .............. 115 in. lbs (9.5833 ft. lbs)
Upper Intake Manifold Bolt/Stud ...... 18 ft. lbs
Valve Rocker Arm Bolt ................... 168 in. lbs (14 ft. lbs +30 degress

Posted on Feb 06, 2010

  • 540 Answers

SOURCE: what is the torque on intake manifold upper and

22 foot lbs. for the lower and 8 to 10 for the upper. tighten these bolts in a criss cross pattern, also make sure to put teflon sealant on the lower intake bolts to make sure oil does not weep up the threads, and it also helps to ensure they don't loosen.

Posted on Feb 12, 2010

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SOURCE: what are the torque specs for the intake manifold

the torque spec's require you to tightened to 10 ft lbs and then tighten another 30 degress which will give you about 12 to 15 ft lbs of torque. make sure that you start in the middle and work your way out when tightening manifold because it will crack easily.

Posted on May 02, 2010

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duane_wong
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SOURCE: What are the torque specs

Front Pipe REMOVAL & INSTALLATION Pipe Without Catalytic Converter

  1. Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal..
  2. Raise and support the front of the vehicle on jackstands.
  3. Remove the exhaust pipe-to-manifold nuts.
  4. Support the catalytic converter, then disconnect the pipe from the converter. Remove the pipe.
  5. Remove the exhaust gaskets. To install:
  6. Be sure to use all new gaskets when required. Assemble the system, check the clearance and tighten the bolts to about 15-30 ft. lbs. (20-41 Nm). Fig. 1: Front exhaust pipe connection common on vehicles with the catalytic converter not included 86813320.gif

  7. All clamps should be tightened to about 18-25 ft. lbs. (24-34 Nm). Do overtighten the clamps. If pipes become dented they can leak.
Pipe With Catalytic Converter
  1. Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal.
  2. Raise and support the vehicle.
  3. On some vehicles you will need to remove the brace from the transaxle.
  4. Remove the exhaust pipe nuts from the manifold.
  5. Support the catalytic converter pipe bolts from the rear of the converter.
  6. Lower the catalytic converter/front pipe assembly from the vehicle. To install:
  7. Be sure to use all new gaskets when required.
  8. Attach the new catalytic converter/front pipe assembly to the vehicle. Tighten the pipe to manifold nuts to 20-40 ft. lbs. (27-55 Nm).
  9. Attach the bolts at the rear of the catalytic converter/front pipe. Tighten them to 30-35 ft. lbs. (41-47 Nm).
  10. Connect the brace at the transaxle if removed.
  11. Lower the vehicle. prev.gif next.gif

Posted on Dec 18, 2010

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