Tuesday, April 2, 2019

Sledgehammers and Boroscopes

From very low tech to high tech, using the right tool is important.  In our case, this includes sledgehammers and boroscopes.

Ray and I commented today it seems like we use the sledgehammer an awful lot on this car.  Got a lot of swings in on getting the sheet metal back in place, esp on the rear.  Here's the latest picture of rear end, not perfect but acceptable:


Then here's a view of the two seats after we used the sledgehammer to bend the seat frames back into position:


Reinstalling seats needs to wait until we finish the minor rust repair and apply POR15 to the floors to prevent future rust.

Meantime, we've been wanting to start on the engine.  We had removed the plugs and poured about an ounce of Marvel Mystery Oil with motor oil into each cylinder.  After sitting for a few days, and using a more effective socket and breaker bar on the front of the crankshaft, we got the engine to turn over freely.  We then decided to use a boroscope to inspect and take pictures of the inside walls of the cylinders.  So here's the four cylinder wall pictures in order from #1 to #4:





It's a little hard to see, but in each picture the left hand side is the top of the cylinder wall (we had the piston at bottom position of each picture).  The wall surface is shiny and in most pictures you can see where the piston and rings stop on the wall.  So no gobs of rust on the cylinder wall that need to be removed.

We then did a compression test.  We had spun the engine some to get excessive oil out from on top of the pistons, but apparently not enough - all four cylinders maxed out the compression gauge at well over 200 psi!  Think we need to let that oil soak back down the side walls and try this again later.  But the key points is there is no evidence of cylinder wall corrosion or valves stuck open with crud, we may get lucky on this engine!

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