in the sequence of VIN's that should have the missing O-ring. Also, this engine was replaced at 70,000 miles (about 50,000 miles ago) because of a warranty issue with the radiator.

I will have the oil pressure and oil pump checked out right away. Wouldn't the oil pressure warning come on if there was low oil pressure?

Dick Schneiders


Quote Originally Posted by Jake
As for the missing O ring causing it to rattle, again, if it's something that has developed over a period of time, and this is on a high mileage engine, it's most likely not a missing O ring. Something like this would reveal itself much earlier in its life, if not within the first 10K miles. In other words, that O ring doesn't suddenly go missing, it's not there from the get go.

Dick Schneiders:

Your problem is a bit more serious I fear. You don't have any start up rattle but instead it reveals itself at highway speeds and becomes embarrassingly loud. You need to get this into a shop soon and find out what the problem is. To me, it sounds like the beginning signs of an oil pressure problem. When it's cold you don't hear it because the oil is thicker which of course gives you a bit more oil pressure.

In your case, this may actually be a problem with your oil pump as Bill R hints to. I don't mean to point out the obvious, but this isn't something you can let go for very long before permanent damage occurs.

Regards,
Jake Larsen