Prior to this past season I replaced the old style exhaust flappers with the modern version on my 1989 5.7 engines. I used OEM parts. At that time they moved freely and closed firmly, as designed. I have now discovered that at least one set are not closing completely, leaving a gap for possible water entry. The gap is equal on both sides of the tube, both "wings" seem to be suffering the same problem. They open freely and there is a normal amount of closing force. The tube is smooth and I cannot find any obstruction.
Thoughts? Are they simply defective? Is this a known issue?
I attempted removal but feared breaking them. Advice on removal would be appreciated.
Thoughts? Are they simply defective? Is this a known issue?
I attempted removal but feared breaking them. Advice on removal would be appreciated.
