85 Chevy P/U – engine tear down

This post highlights the engine tear down of the old 305 in my 1985 Chevy Short-Box, Step-Side Restoration Project, in preparation for rebuilding.

This is really going to be more of a “show and tell” post… the pictures pretty much explain it.

Here’s the engine as it was being removed.

85 Chevy Shortbox - teardown 1 85 Chevy Shortbox - teardown 2

The brackets, sensors and accessories were the first to go… then the exhaust manifolds were removed. As you can see in the picture (sorry for the quality of this one), the two “shiny” spots are broken bolts in the drivers side manifold… bummer. I could not get the manifold to budge — the bolts were frozen/welded to the manifold! Arg! It took a bit with a drill bit down the center of the bolts to get the manifold off, and then a little heat on the bolts to remove the broken studs from the heads — no biggie.

85 Chevy Shortbox - teardown 3

Next to come off were the rocker covers — everything looked good under there.

85 Chevy Shortbox - teardown 4

Then the intake manifold.

85 Chevy Shortbox - teardown 5

The rocker arms were loosened off and the push rods were removed.

85 Chevy Shortbox - teardown 6

The heads were removed next.

85 Chevy Shortbox - teardown 7

Down to the block, I removed the timing chain cover…

85 Chevy Shortbox - teardown 8

Flipped her over and removed the oil pan.

85 Chevy Shortbox - teardown 9

Here you can see the crankshaft after the oil pump and pistons have been removed.

85 Chevy Shortbox - teardown 10

And finally… a stripped down block. The timing gears and chain, camshaft, crankshaft, main bearings, oil filter port and flywheel have all been removed.

85 Chevy Shortbox - teardown 11

Other than that, I cleaned up the block a little, removed the old gaskets and all bolts and it was ready to be sent out for testing and machining. The heads went at the same time, after I cleaned them up.

Stay tuned for the rebuild! 🙂

Links to other parts in the series;

4 comments on “85 Chevy P/U – engine tear down

  1. the only thing that might be different is the flywheel used. Older 4.3 engines are externally balanced on the flywheel,so you may need the 305 flywheel to lessen vibration and extend engine/tranny life.

    Kyle’s reply;

    Thanks for the info, Dennis!

    Regards;
    Kyle

  2. That’s an interesting tutorial, obviously I am still a beginner and I have a lot more to learn about engines. I think I can handle the tearing down, I am more concerned about rebuilding. Do you have any experience with Chevrolet engines?

    Kyle’s reply;

    You’re really a beginner, eh? That IS a Chevy engine — a 305 to be exact. 😉

    Here’s the rebuild.

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