rockfangd Posted May 3, 2017 Report Share Posted May 3, 2017 Hi all. A few weeks back I removed the oil filter housing from my 1997 Seville to replace the bad oil pressure sender. I replaced the o-rings, sender, and I had ordered the bypass valve. When I went to install the bypass valve it would not work. I am pretty sure I was in the right place. I took the fitting off that the oil filter screws into and it was under it, to the side of it The new valve sure looked too big compared to the one that was there. I am going to be doing the same on my 97 Deville here in a few weeks and it has the exact same parts. The part # for the valve is 25013759. Anyone else ever change it. I swear Every one I have ever gone to change was not right. Unless I am just looking at things wrong GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 3, 2017 Report Share Posted May 3, 2017 This is new to me. There is a by pass valve in the oil.filter adapter? This is the first I ever hear about it, I would have.changed mine had I known Why did I think the by pass valve was in the oil filter itself? Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
OldCadTech Posted May 3, 2017 Report Share Posted May 3, 2017 GM was more concerned with keeping the engine oil cool if the oil filter became clogged. IIRC it was only used/needed on the engines with oil coolers, but that is about all of the N*s I'm thinking. i've never changed one though. Seen a few oil pressure relief valves go bad and burst the oil filter, that's pretty ugly THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!! Link to comment Share on other sites More sharing options...
rockfangd Posted May 4, 2017 Author Report Share Posted May 4, 2017 I have posted a picture in the first post. I was thinking it was the part to the right of the threaded part the filter screws onto. Maybe I am wrong. The edge of it is just under the insert GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 5, 2017 Report Share Posted May 5, 2017 On Wednesday, May 03, 2017 at 8:57 PM, rockfangd said: I have posted a picture in the first post. I was thinking it was the part to the right of the threaded part the filter screws onto. Maybe I am wrong. The edge of it is just under the insert Thanks, I thought that was a new photo! I have seen that valve but didnt know it was replacable. You definately don't want that valve sticking or opening too easily. Historically, what have you found wrong with them Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
rockfangd Posted May 6, 2017 Author Report Share Posted May 6, 2017 honestly nothing. Just figured since I was there and it was 20 years old it might not be a bad idea GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 6, 2017 Report Share Posted May 6, 2017 2 hours ago, rockfangd said: honestly nothing. Just figured since I was there and it was 20 years old it might not be a bad idea Thanks Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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