Saturday, 28 June 2025

SQ4 - sump plate

 The sump plate looked a bit mangled when I took it out after the oil was drained.

After degreasing I cleaned it up using some clock cleaner which is an ammoniated fluid used for stripping the corrosion from brass and copper. It works very well on the gauze.


When I got it clean, I manoeuvred the washer that stiffens the hole for the oil pickup pipe out of it's wire prison. I managed to get it back into place and squeeze it tight to retain the gauze.

With that done I could think about refitting the sump plate. I destroyed the gasket completely when I removed it so I needed to make a new one. 

With a sump plate it's easy to cut a piece of gasket paper to the right shape and to mark the holes.


Punching the holes is the easiest way to make them tidy and I used the corner of the sump plate to complete the ring of gasket around the holes.


I cut the centre out with a craft knife - it will be big enough to use for something else.


When I drained the sump, there was around a cup full of oil coming out and of course the gauze was damaged. The pickup pipe was the cause of both of these in that it was out of position - too high and off centre. It's just a copper pipe retained with a bracket inside the crankcase so it's quite easy to bend it into the right place.


With some Threebond 1215 the sump plate is back on and the plug fitted.



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