Doug&Deb Posted March 25, 2019 Report Share Posted March 25, 2019 Is it normal for the oil pressure to drop to 20 on a freshly rebuilt engine when i come to a stop. It goes back to 50 or so as soon as I accelerate. The car is a 52 Coronet with gyromatic. Quote Link to comment Share on other sites More sharing options...
casper50 Posted March 25, 2019 Report Share Posted March 25, 2019 When I first ran my rebuilt 230 I was told that our engines normally ran around 20 to 25 lbs at idle. My problem was mine ran at zero at warm idle. Had to buy a new pressure relieve valve and then I had way too much. 70 at warm idle. Had to trim the spring a few times to get it to run at 40 warm idle and 60 at speed. Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted March 25, 2019 Author Report Share Posted March 25, 2019 Okay, it seems normal but this is the first rebuilt engine I’ve ever had so I’m probably over cautious. Thanks. Quote Link to comment Share on other sites More sharing options...
casper50 Posted March 25, 2019 Report Share Posted March 25, 2019 I was/am the same Doug. Better safe than sorry with something that cost as much as that. Taking things easy with it to begin with. Will take longer trips this summer. Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted March 25, 2019 Author Report Share Posted March 25, 2019 I’ve put about 500 miles on with no problem. Just concerned. This rebuild was a nightmare for me and the rebuilders due to bad work done by a previous owner. Quote Link to comment Share on other sites More sharing options...
greg g Posted March 25, 2019 Report Share Posted March 25, 2019 (edited) Does it increase with the clutch disengaged or in neutral? What is the ide speed? 20 psi at ide is well within factory specs. What do you use for engine oil, what is your operating temp? Edited March 25, 2019 by greg g Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted March 25, 2019 Author Report Share Posted March 25, 2019 It increases with the clutch disengaged. Idle speed is 475. No noises at all. The engine runs strong and smooth. I’m probably overthinking this. It’s normal for me. Quote Link to comment Share on other sites More sharing options...
greg g Posted March 25, 2019 Report Share Posted March 25, 2019 Wouldn't worry. Keep you eye on it as ambient temps go up but you should be good to go. Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted March 25, 2019 Author Report Share Posted March 25, 2019 Thanks Quote Link to comment Share on other sites More sharing options...
dale Posted March 25, 2019 Report Share Posted March 25, 2019 1 hour ago, Doug&Deb said: It increases with the clutch disengaged. Idle speed is 475. No noises at all. The engine runs strong and smooth. I’m probably overthinking this. It’s normal for me. With a std trns isn't idle suppost to be more like 700 rms ? Quote Link to comment Share on other sites More sharing options...
greg g Posted March 25, 2019 Report Share Posted March 25, 2019 Last word in op is Gyromatic.. Quote Link to comment Share on other sites More sharing options...
Worden18 Posted March 25, 2019 Report Share Posted March 25, 2019 My 51 Meadowbrook does the exact same thing as you've described. 230 Flathead with Fluid Drive. Almost 9K on rebuilt engine, no problems. Ran great at 98F outside temp and at -33F as well. You'll be fine. Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted March 26, 2019 Author Report Share Posted March 26, 2019 Thanks everyone. Quote Link to comment Share on other sites More sharing options...
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