Have a blown 2000 dohc. Is it possible to convert a 1.9l Saturn sohc engine to dohc?

Answer 1

I just did a 96 SL2 DOHC block swap into a 2k SW2 DOHC. My sister loves those crappy Saturns. She blows up one every 9 months. :P Before you go to all that trouble you might want to consider getting a non-GM car... You know, one that won't fall apart as soon as you finish an overhaul on it.

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All Saturn S-Series blocks are compatible with all Saturn S-series heads. Just make sure that you change EVERYTHING related to the timing chain. (Timing cover, cam and crank sprockets, tensioner, and guides.) These all need to be from the engine that the head is from.

Also, use the intake manifold from the head... even if the sensors don't plug up. You might have to splice the plugs in that are compatible with your manifold.

The exhaust may need to be changed also, but if you can get the one that came with the head to fit properly then use it.

If you run into the problem I did of the exhaust pipe not being able to mount up to the right manifold and not hang on the bottom of the engine, you must be very careful and tap holes for the other style manifold. WARNING: You WILL run into water galleys when you do this! I recommend coating the threads of the bolts with JB Weld or some other kind of "cold weld" product before putting them in and tightening them fully. Allow this to dry for a day before adding water.

It's best to tape the manifold gasket to the head, running it through the 3 studs that line up on both manifold styles (on bottom - far corners and center) so that it doesn't shift. That will give you a good marker on where to tap the holes. AVOID tapping holes in front of the #1 cylinder else you may run through both an oil and a water galley. This will turn your motor into crap faster than my sister would. :P