A batch of ISL's in that time frame had a wrist pin problem. It was the subject of a recall but the fix was not a fix, just an early warning devise of an impending problem. This is a known issue within a block of serial numbers and even though you are out of warranty they should step up.
Good luck and I hope I'm wrong. Let us know how you make out.
Full time since 2007
2003 Monaco Signature