Question about 2002 Chevrolet Blazer

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Timing chain replacement images for 2002 trailblazer 4.2l

Would like as many detailed diagrams in regards to replacing timing chain

Posted by Robert Morrison on


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Clifford Beard

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Below are some pictures for you. This is not the easiest chain to replace. Things like the water pump, power steering pump, oil pan all have to be removed. Also I have had to manually rotate one of the camshafts and hold to line up the marks. Not in all cases but it has happened. You really need to make sure you are at top dead center (TDC) when putting back together. If you want feel free to email me at [email protected] with all your information and I will be happy to make you up a PDF with detailed step by step instructions with pictures. There would not be a cost to you for this. I don't mind helping. It can be quite detailed and you don't want to be off even a tooth which is why I did mention maybe having to rotate a camshaft. Also when buying the timing chain be sure to get a quality chain. The cheap ones don't have colors or marks on them and not only are you lining up your timing marks as far as the crank and camshaft sprockets but there are also chain links with colors on them that need to match up to your marks as well. This helps in making sure everything is lined up correctly. Hope this helps.......

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Posted on May 15, 2012


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SOURCE: timing chain replacement

Go to your local Library and you can probably get great help there if your gonna do this ur self and if u don't want to spend money on a manual for ur car and even that might not have what u need.

Posted on Oct 02, 2009


Greg Bernett

  • 2989 Answers

SOURCE: Timing Chain Cover, Chain, Sprockets, replacement

2.2L VIN 4 To Remove:

  1. Remove or disconnect the following:
    • Drive belt.
    • Drive belt tensioner.
    • Alternator.
    • Power steering pump. Place the pump aside with the lines attached.
  2. Lift the vehicle.
  3. Remove or disconnect the following:
    • Oil pan.
    • Crankshaft pulley and hub.
    • Timing cover bolts.
    • Timing cover. If necessary, tap with a rubber mallet to loosen the cover.
  4. Clean the mating surfaces.
To Install:
  1. Install or connect the following:
    • Timing cover gasket.
    • Timing cover and the bolts. Tighten the bolts to 11 Nm (97 in. lbs.).
    • Crankshaft pulley hub and the crankshaft pulley.
    • Oil pan.
  2. Lower the vehicle.
  3. Install or connect the following:
    • Power steering pump.
    • Alternator.
    • Drive belt tensioner.
    • Drive belt.

Posted on Aug 30, 2009


  • 53 Answers

SOURCE: timing chain replacement

The timing chain on the Trailblazer 4.2 L is a metal chain. Unlike plastic timing belts that require replacement at certain mileage, this metal chain should be good for the life of the engine.

Posted on Oct 30, 2009


  • 553 Answers

SOURCE: 2002 Trailblazer

Electronic throttle control. It's most likely a bad solenoid or sticky linkage.

Posted on Jun 23, 2010

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