Re: Oil filter canister lines

Posted by HH56 On 2016/11/7 15:54:26

Some restriction is necessary but since the V8 filter oil is supplied from a different spot than on inline 8s it is not as critical. On V8 filters I believe the restriction is in the center pipe. On some there is a small outlet hole -- maybe 3/32" in diameter -- approx 2" from the top of the pipe. On others there are two or three very small holes spaced down the length of pipe. Those should be the only restrictions necessary. If the restriction in the fitting is larger than the holes in the pipe then it won't hurt to leave it.

On the inline 8s the restriction is more critical because the oil supply is taken to the filter before it reaches the valve lifters. On those engines, without the restriction the hydraulic lifters can be starved for oil if too much goes to the filter whereas on a V8, the filter supply is taken from a point after the lifters get their supply.

The early inline 8s had the restriction in the fitting so perhaps someone had an extra fitting or read one of the early bulletins and decided to make a restriction in that car. Perhaps the car had noisy lifters from one of the oil pump issues and that restriction was an effort to control a different problem.