Compression test on Engine on stand?

[luderchris]

Since there is no starter on the motor, is there any way to check compression?

Thanks for any ideas.

Chris

 

[Broncobowsher]

If you add a flywheel, bellhousing and starter it can be done.
A leak down tester might be a better choice.

 

[360 4V]

There is a strange way of checking compression. Take all the spark plugs out off the long block. Place a spark plug only in the cylinder in question and then turn the crankshaft. Note how much resistance there is. Now try this for all cylinders but only with one spark plug at at time in the cylinder your testing. If one cylinder is easier to turn then the compression is lower.

 

[73azbronco]

watch out cranking a motor on a stand, you might flip it, ask me how I know.

 

[360 4V]

I only do this technique with a braker bar atatched to the crankshaft. I don't see a long block flipping over but as always watch that you don't drop heavy machinary on your feet.

 

[chandaman_05]

Like said earlier, a leak down test would give you a good idea on cylinder health and doesn't require the motor to crank.