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I drilled a tiny (0.63mm) hole in the tank cap to fix a problem where pumping from my aux tank in the trunk into the main tank would cause it to build up significant pressure. It should help for vacuum as well, but the proper way to fix it would be to clear the tank vent, I think it has a check valve in it, because I never had a problem with vacuum, only pressure...
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Ich liebe meine Autos!
1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot
Excessive speeding? It ain't excessive till I redline!
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