What is your IPR when you have the long crank?

-jokester

 

I don't know if I misunderstood your question. You know the drain back valve is located in the bottom of the oil filter housing. Your oil filter is suppose to mash it down to close the drain. I have been told some after market filer do not close the valve.

 

Yes, I know. I only use Motorcraft. My question is how to test to see if the valve is working. With the filter out, can you just push down on the part that goes into the filter and close it? I did that and the oil I poured in still drained.

 

No - the part that the filter slides on to is just a pipe with a bypass valve in it. This is in case your oil filter clogs, the oil will bypass the filter and still be able to flow (somewhat). What you need to press down to test is inside the bottom of the housing, to the rear right of the oil filter pipe. You'll see a little black button with a spring on the bottom of it (might not see the spring due to the remaining oil). Like postmaster said, when your filter is in and cap is screwed down all the way, this spring is compressed, sealing the valve, keeping oil inside the housing.

-jokester

 

Great! Thanks Jokester. That is the information I was looking for. I just wanted to test the operation of the valve.

 

Jokester, in answer to your first question. The IPR reading on my ScanGauge is 14.8 koeo and goes to 50.1 in less than a second when I start to crank. Then it goes to 84.7 after a couple of seconds. I think the Scangauge is delayed about a second in displaying readings.

 

one method is when you pull the cap and filter ( after letting the truck sit for a while) the filter should be dripping with oil

thats why it is best to avoid a mess to let the filter sit in the housing for a while after you open it up and let it drain out through the valve

if the filter is already dryish when you pop the filter up then you likely have a valve issue

 

Thanks ZMANN. I will give it a look one morning before I head to work.