These are the tools I made up to flush my tank. Yes - blasting media will screw your pump. probably what happened when you were doing your tests, the pump locked up on the grit. Then overheated and burnt the motor. It needs fuel flowing over it for cooling. They get hot pretty quick without it (less than a minute).
I had to order the blanking plug from a tool supplier - but readily available. I tapped in a hose nozzle to direct the fuel flow to a container. I actually machined a slight downslope contour on the inside of the plug to direct flow to the nozzle fitting. Flushed the pump line backwards (into tank) using an 044 pump. That could drain straight out the plug fitting. Then pulled the drain plug and could just get enough access with fingers to clean any residual grit in swirl pot. Repeat as necessary. If you have grit in the tank on the outside of the swirl pot, you may need to remove the tank and sluice stuff around and tip out via the sender hole.
I ground down a bolt head and welded a nut thing on for my drain plug tool. It will be tight. There is an O ring seal just inside on the neck of the plug. I think the reason I ground the bolt head down was to start with a bigger bolt - so it didn't snap. There should be a metric bolt head size that would fit - but the shank may be a bit light. Worth a shot first. There is a proper tool of course - but who needs those? :-)
Good luck
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Last edited by Alan L; 03-14-2022 at 08:18 PM..
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