Filter Cap Filter

Volvo Penta AQ140A leaking heat exchanger filter cap. Replaced impeller now its leaking, help?

I have tried to tighten the seal up by knockin in the tabs but under around 4500 revs after idle it spits water from the cap. Is it just doing it because the impeller is pumping water alot more pressure? I have tried flipping the cap and tapping the tabs to tighten seal. It has slowed it a little but not much. Help???!!! I want to take my boat away for new years!!
There was no build up in the filter and the impeller had not perished that bad. Im lead to believe there is unneccessary pressure building up in the exchanger. Cheers guys looks like the boat is staying at home

Replace the cap and when U replaced the impeller did U find all the pieces that broke off the impeller.Look for them as it will block the exchanger cooling holes and cause Temperature to rise & pressure to build.

Capacitor explosion, up close and personal.

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