Alpineracer8
Donation Time
Gentlemen:
I have been researching what appears to be a rather lively discussion several years ago on the Forum regarding brass vs. steel oil pressure relief valves in spin-on oil filter bases on later Alpines. Not to restate all of this, but the problem is said to be either erratic pressure readings or low/non-existant pressure at idle. Prior to building the new 1600 engine for my racing Alpine Series I, I experienced the same "no oil pressure at idle" problem in my 1725 outlined in the earlier pressure relief valve discussion. The aforementioned 1725 had the spin-on oil filter base with the oil cooler block under the filter base that contained the inlet/outlet for the oil cooler lines along with the pressure relief valve. The previous owner had modified the pressure relief valve to be adjustable.
Not knowing any better, I put this oil filter base/oil cooler & relief valve block set-up on my racing engine again. Now, from reading on the Forum, I find out that there has historically been a problem with the early style spin-on filter housings with the brass pressure relief valves; it seems the valves have a tendency to stick open, thereby allowing all the oil to bypass the motor and just get pumped back into the sump.
My big question now is this...is there a way to tell which pressure relief valve I have? I realize that I can remove it and look at it, but I've seen some of these that have the relief valve on the front side of the cooler block. Mine happens to have the relief valve on the passenger side of the cooler block next to the cooler lines. If I do indeed need to take it apart, am I going to be looking for a brass piston AND sleeve, or just a brass piston? I've never had any experience with this sort of thing before so any help would be appreciated.
Thanks,
I have been researching what appears to be a rather lively discussion several years ago on the Forum regarding brass vs. steel oil pressure relief valves in spin-on oil filter bases on later Alpines. Not to restate all of this, but the problem is said to be either erratic pressure readings or low/non-existant pressure at idle. Prior to building the new 1600 engine for my racing Alpine Series I, I experienced the same "no oil pressure at idle" problem in my 1725 outlined in the earlier pressure relief valve discussion. The aforementioned 1725 had the spin-on oil filter base with the oil cooler block under the filter base that contained the inlet/outlet for the oil cooler lines along with the pressure relief valve. The previous owner had modified the pressure relief valve to be adjustable.
Not knowing any better, I put this oil filter base/oil cooler & relief valve block set-up on my racing engine again. Now, from reading on the Forum, I find out that there has historically been a problem with the early style spin-on filter housings with the brass pressure relief valves; it seems the valves have a tendency to stick open, thereby allowing all the oil to bypass the motor and just get pumped back into the sump.
My big question now is this...is there a way to tell which pressure relief valve I have? I realize that I can remove it and look at it, but I've seen some of these that have the relief valve on the front side of the cooler block. Mine happens to have the relief valve on the passenger side of the cooler block next to the cooler lines. If I do indeed need to take it apart, am I going to be looking for a brass piston AND sleeve, or just a brass piston? I've never had any experience with this sort of thing before so any help would be appreciated.
Thanks,