Is this the death knell? (Oil light on when hot) |
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Is this the death knell? (Oil light on when hot) |
PDXMike |
Jul 11 2015, 12:17 PM
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#1
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Slowly Learning Group: Members Posts: 111 Joined: 20-December 10 From: Portland, OR Member No.: 12,501 Region Association: Pacific Northwest |
I was creeping along in traffic the other day, about 89 degrees out, when my oil light started to flicker on whenever I dropped the RPM's a bit when engaging the clutch. I've always been able to make this happen if I REALLY lugged the engine down, just about stalling it, but this was unusual. It started to get the point when letting the RPM's anywhere below idle (900 or so) the light would come on, and it would even blink a little at idle. Luckily I was at my destination so I just shut everything down. I checked the oil (which was fine) but the dipstick was so hot I could barely hold it even using a crumpled up paper towel. I towed the car home and let it cool down. When I started it up to pull it in the driveway everything was back to normal. The oil light turned off quickly after start-up and would even stay off for a second or two after I stalled out the engine. How bad is this? It could be something as simple as the oil pressure sender, right? It doesn't HAVE to be horrible, does it? Or should I be thinking about what kind of great upgrades I'll make during my rebuild? -Mike |
Cj Honeycutt |
Jul 11 2015, 02:51 PM
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#2
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Member Group: Members Posts: 50 Joined: 7-August 10 From: Fallbrook, CA Member No.: 12,020 Region Association: Southern California |
Oil pressure switches get tired from pressure and thermal cycling and need replacing (especially after 40 years!) . Oil pressure relief valve springs even more so. Try removing the oil pressure relief valve and spring, and adding a 1/16 shim between the valve and spring or spring and retainer. It is quick and easy. Examine the valve for signs of hanging up (lengthwise scratches in the direction of travel) and if scaring has occurred, replace valve. You don't need to buy a special tool to remove the valve, a tap (perfectly clean) that just fits inside it will hold it nicely for you to pull out.
Racer Chris (I think) supplies and improved valve and spring (or someone on here does). Good luck ! |
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