Thursday, July 3, 2014

"Black Hole" Blues

You may recall earlier in this blog that I removed the Clutch Master Cylinder to rebuild with a kit I bought in the mail. Well It was working fine, but randomly one day when I backed the car down the hill to turn it around to work on the passenger side it wouldn't slide back into gear. So after towing the car back into the garage we quickly diagnosed that the clutch slave cylinder was leaking fluid and not building pressure. So off it went to White Post. It came back, got re-installed, and the system was bled. After fully bleeding the system the pedal still would go halfway to the floor with no pressure, not good. So I figure the clutch master is now the issue, chances are the $17 kit from china probably isn't the best. So the master has to come out again.

Most automotive companies when it comes to designing hydraulic brake and clutch control system aim for simplicity and ease of maintenance, at least they did once upon a time. For example check out the location here in a CJ-5, it's so easy to get to, and the reservoir is right on top of the cylinder.


SAAB however, as usual threw convention to the wind and mounted their cylinders way down out of reach, because they know better. The master cylinders -both Clutch Control and Brake- in the Sonett are mounted right behind the pedals on the engine side of the firewall, down behind the trans-axle, beside the transmission, underneath the steering rack. The fact that I have to list 3 things that they're near should be a giveaway how impossibly difficult it is to get to the cylinders, never mind getting tools on them. This area is affectionately known among Sonett owners as the "Black Hole" as you put hands, tools, screws bolts, and anything else down there and they don't come back.

Since this is such a common issue Ashcraft sells an access door that allows you to cut a hole in the frame there to get tools on the cylinders but doesn't compromise frame rigidity. So I bought one of those, but it's a custom built part and he didn't have one ready in stock. So I got the instructions and cut the hole so I could go on and get the cylinder out and send it off.



So with the cylinder out off it goes to White Post to get rebuilt. Hopefully after it will let the car go back into gear and then mechanically the car is done.


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