Join Date: Jul 2000
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diesel saturation of Fiberglass
LH44, Sorry for over reacting a little. I have just seen bad experiences with repairs of cored laminates and then had to forensically develop repair procedures with computer modeling to save the structure. Your actions thus far, now that I understand them, will minimize repair costs.
If the diesel impregnation of the Airex is keeping you up at night, removing a 2-4" diameter section of exterior laminate with a hole saw (round holes - important) as a vent would be an easy repair. Drive the diesel out with small heat application.
If you can locate the tank leak and it is a manufacturing type defect in the lay up, fine. But, if it is integral with a tank/bulkhead intersection with the hull form, life gets a whole lot more complicated. These are the ultimate hard spots in laminate designs. Overstressing the interior core laminates at these locations is very easy. You may get the leak fixed until you lift the boat off the cradle!! If a metal tank is not in your future, what about a custom bladder for the tank? Have this type of tank in the plane and they seem to a have a life of about 20 years. Just a thought.