 Oil pressure relief valve woes? |
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| ahdoman |
  May 4 2007, 03:26 PM
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#1
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It's phonetic...Ah-D-O-Man (Audioman)  Group: Members Posts: 667 Joined: 7-November 05 From: Santa Clarita, Ca. Member No.: 5,084 Region Association: Southern California  |
OK, here's the symptoms...
extremely high oil pressure readings when cold (about 120psi) and still high when up to temp (about 90psi) while driving. I know the gauge and sender are working because the oil PSI will vary with engine RPM (about 30 PSI). Engine details... 2.0 carbed w/ hydraulic lifters, Royal Purple 10/40 and Mobil 1 filter. I assume the problem lies in the oil pressure regulators? Any other ideas before I begin surgery? So, here are the questions... 1) Do I need to drain the oil before I remove the pressure regulators? 2) Do I need to remove both regulator assemblies (Haynes reference; 15.4 & 15.5 page 29) and if so what do I replace? 3) On page 20, section 6 of the Haynes manual point #2 says "oil goes to a cooler which again has a bypass valve" - Is there another valve actually in the cooler? Extra bonus question for hydraulic lifter experts... On the later bus cases I remember hearing that they eliminated the pressure valve on the right side of the block? My understanding was to provide greater oil flow to the lifters. Is this true and if so do I actually need that valve in place or did I completely get that wrong? |
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| Aaron Cox |
May 4 2007, 05:35 PM
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#2
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
is it a vdo dual sender? they come in both 80 and 150 psi senders... and they dont interchange.....
relief valves CAN get stuck... thus giving you more oil pressure, or less oil pressure depending on where it gets stuck. the filter mount also has a bypass in it... which bypasses the filter if the psi is too high (and thus not filtering most of your oil if you truly have 90 psi) cooler does NOT have a check valve in it. pull the 2 relief pistons and make sure they arent stuck- you will need a 1" wide 'drag link' socket to get the big one out, and then use a 3/8 socket EXTENSION (square end) for the 12 point plug. |
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| ahdoman |
May 4 2007, 05:48 PM
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#3
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It's phonetic...Ah-D-O-Man (Audioman) Group: Members Posts: 667 Joined: 7-November 05 From: Santa Clarita, Ca. Member No.: 5,084 Region Association: Southern California |
QUOTE(Aaron Cox @ May 4 2007, 04:35 PM)  is it a vdo dual sender? they come in both 80 and 150 psi senders... and they dont interchange..... relief valves CAN get stuck... thus giving you more oil pressure, or less oil pressure depending on where it gets stuck. the filter mount also has a bypass in it... which bypasses the filter if the psi is too high (and thus not filtering most of your oil if you truly have 90 psi) cooler does NOT have a check valve in it. pull the 2 relief pistons and make sure they arent stuck- you will need a 1" wide 'drag link' socket to get the big one out, and then use a 3/8 socket EXTENSION (square end) for the 12 point plug. I have the correct sender and am using the correct gauge. So aside from having to pull both pistons how do I get to the one in the filter mount? |
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Posts in this topic
ahdoman Oil pressure relief valve woes? May 4 2007, 03:26 PM
Travis Neff Are you running a stock, or aftermarket oil pump? ... May 4 2007, 03:58 PM
ahdoman
Are you running a stock, or aftermarket oil pump?... May 4 2007, 04:17 PM Aaron Cox thats not your problem. thats so it doesnt blow th... May 4 2007, 05:50 PM ahdoman
thats not your problem. thats so it doesnt blow t... May 4 2007, 05:57 PM jk76.914 I had trouble with the drag link socket. My socke... May 4 2007, 06:01 PM jk76.914 Regarding the hydro lifters- I also have them. I... May 4 2007, 06:17 PM ahdoman Jim - You've been PM'd. May 4 2007, 06:39 PM ahdoman OK, got the one off the bottom of the engine. Is t... May 4 2007, 10:16 PM craig downs No O ring. Looks like you have one of the higher p... May 4 2007, 11:13 PM Jake Raby Replace the piston with a stock unit and the issue... May 4 2007, 11:22 PM |
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