Here's my opinion:
First, buy yourself a good V4 Saab manual such as a Haynes.

What you do to the internals of the engine will depend on what you intend to use the finished engine for and how much money you have to spend.
When you tear the engine apart you should, at least, clean everything up, grind the valves, replace the main and rod bearings, piston rings, along with all seals and gaskets. Check the condition of the timing gears and replace as necessary and verify that the crankshaft, cam and balance shaft journals are un-damaged and measure them with a micrometer to make sure they are in spec. A machine shop will polish all of these for little money if they don't need to be turned. You need to use new connecting rod bolts for re-assembly regardless of anything else. Most other fasteners can be reused.

Beyond that, if you are wanting to build a like-new engine, have the block and heads chemically cleaned, replace the freeze plugs, replace the cam and balance shaft bearings, consider upgrades to the heads (new valves, hardened seats, even larger valves), replace the oil pump, water pump, oversized pistons or pistons to raise the compression level and even a hotter cam.

I'm sure this is not everything but reading the repair manual will basically walk you through all the steps. Good luck and have fun!


posted by 69.68.74...

• V4 engine rebuild, ohmss680, Wed, 17 Mar 2004 16:50:18
  • Running the engine on a stand?, ohmss680, Thu, 18 Mar 2004 16:53:43
    • Re: Running the engine on a stand?, Brian, Thu, 18 Mar 2004 17:29:30
      • So what does one do for cooling? nm, Ohmss680, Fri, 19 Mar 2004 13:04:26
        • Re: So what does one do for cooling? nm, Brian, Sat, 20 Mar 2004 14:17:44
      • And make sure the stand will handle the torque., Dave Westlake, Fri, 19 Mar 2004 11:43:36
  • Re: V4 engine rebuild, Brian, Wed, 17 Mar 2004 17:04:18 <-- Viewing This Message
  • Re: V4 engine rebuild, Bob Smith, Wed, 17 Mar 2004 17:03:35
    • Another V-4 rebuild, Bill Tubbs, Thu, 18 Mar 2004 18:09:46
      • You touchee valves, you needee hardened seats, spiv, Fri, 19 Mar 2004 05:57:00
      • Re: Another V-4 rebuild, Bill Tubbs, Thu, 18 Mar 2004 18:12:15
    • Open deck or closed deck?, spiv, Thu, 18 Mar 2004 05:31:31
      • Re: Open deck or closed deck?, Ossi Rantonen, Wed, 1 Dec 2004 03:17:34
      • I am pretty sure I am closed deck., ohmss680, Thu, 18 Mar 2004 08:58:23
    • Why 1700 over 1500 ? n/m, BobD, Wed, 17 Mar 2004 21:38:07
      • Re: Why 1700 over 1500 ? n/m, Bob Smith, Thu, 18 Mar 2004 17:37:54
        • 1500 = 73 HP, 1700 = 65 HP ??? n/m, BobD, Thu, 18 Mar 2004 20:11:54
          • That's SAE gross vs. DIN, no real difference n/m, spiv, Fri, 19 Mar 2004 05:55:14
    • I hear the dif is small no matter how you look, 6hp? nm, ohmss680, Wed, 17 Mar 2004 17:22:50

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