We seem to have our answer. An L30003 interchanges to a Delco P3/ Fram PB50 which is 5/8"-18 thread. The auto parts store probably gave you the correct Delco PF24/ Fram PH25 filter for it which is 13/16"-16. Is this a Buick 350 by chance?
I havent been able to locate the casting numbers on the block itself. The seller claimed it is a 75 455. I checked the casting numbers on the heads and intake and the read true. Where exactly are the casting numbers located on the block
The 2 digit engine code is on the deck of the block, between the #5 and #7 spark plugs. Next to the dipstick tube. For whatever reason, the oil filter housing has 5/8" threads, not 13/16" So go get the correct, wrong filter and your leak should be solved. ray:
Ok. I am convinced that the oil filter housing has been changed. The guy I bought the car from swears nothing has been modified. Can anyone give me any advice on how to remove the oil filter housing so I can put the correct one on?:rant:
Why not just put the right oil filter on? it was running fine with the L30003. If its not broken, why fix it?
Im starting to get a little lost here so forgive me. I was under the impression that the auto parts store gave you a PH25 or equivalent as a replacement for the L30003?
No. The only filter's (plural) they ever gave me was the 30003. I never said anything about another type of filter. That was the model number on the "original" one that was on there when I bought the car. I only drove the car a couple of blocks before I bought it and it ran fine. Now it does the same thing whenever I replace it. It runs fine for the first couple of times I drive it after replacing the filter and then it starts pouring.
There's obviously a problem here. What it is exactly, Im not sure. The car was fine prior to the oil change?
Well, logic would have it that if it was fine prior to the oil change, then the problem is what you did or what you put on when you changed the oil. Could it be that the filter your putting on is wrong? If your buying them from the same auto parts store, could it be that he has a bad batch? or mis-boxed filters? Maybe get a different brand? Did you save the old filter? maybe you could compare the new filter side by side with the old one Could you put that one back on to see if the problem goes away? BTW, a Purolator L30003 doesnt, or shouldnt fit a Buick. The correct Purolator number should be L20033
Exactly. That model fits a Ford truck. Just found that out. And yes I took the filter with me when I bought the new one.
