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| oil lamp flickering wildly https://www.slantsix.org/forum/viewtopic.php?t=31300 |
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| Author: | zerglin87 [ Wed Sep 24, 2008 9:56 pm ] |
| Post subject: | oil lamp flickering wildly |
dunno if anyone knows about this but whenever i say, get on the high way for 15 mins constant at 55-75 MPH, and when i get off the highway my oil lamp flickers wildly at a complete stop in gear dunno why, but when i set it in neutral/park it stops flickering on like crazy, any ideas as to what may be going on? |
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| Author: | 68barracuda [ Wed Sep 24, 2008 10:04 pm ] |
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I am watching this tread with interest since I have experienced this as well Was wondering if the pressure relieve valve in the oil pump is not at fault |
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| Author: | Slanted Opinion [ Thu Sep 25, 2008 5:42 am ] |
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First step of diagnosis is to connect a true oil pressure gauge to your engine. You can put a Tee in where the oil light sender is located. Then you'll really know whether you have a problem or just a faulty sender. -Mac |
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| Author: | Pat Dawson [ Thu Sep 25, 2008 7:09 am ] |
| Post subject: | |
These engines idle low in gear. After a long run (hot oil) I don't think it is of great concern if you get a flicker in a high mileage stock engine as long as the light goes out when you go to neutral or as soon as you move the car. Maybe a heavier oil like 15/40 or 20/50 may help. |
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| Author: | SlantSixDan [ Thu Sep 25, 2008 10:12 am ] |
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Do not just randomly change to a heavier weight of engine oil. What year is the vehicle/engine, how many miles are on it, and what grade of oil are you using now? Do not dismiss this as a non-problem. Do perform some (probably overdue) routine maintenance and then diagnose the trouble correctly. The routine maintenance in question consists of servicing the oil pressure relief valve to make sure it's doing its job, as described in these two threads: thread 1, thread 2. Then adjust your engine idle speed so that it is correct use an accurate mechanical oil pressure gauge as Slanted Opinion suggests, to determine what your actual oil pressure is in gear at idle when hot. If it is within specs, then replace the oil pressure sender. |
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| Author: | KBB_of_TMC [ Thu Sep 25, 2008 10:48 am ] |
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When I've seen that happen twice, once it turned out that the oil pressure switch had broken and the other time the wire leading to it started shorting someplace. |
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| Author: | zerglin87 [ Thu Sep 25, 2008 11:37 am ] |
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Quote: Do not just randomly change to a heavier weight of engine oil. What year is the vehicle/engine, how many miles are on it, and what grade of oil are you using now?
Sounds serious, too bad i dont have time or the money to fix it, unless anyone here knows how much an oil pressure gauge tool costs.
Do not dismiss this as a non-problem. Do perform some (probably overdue) routine maintenance and then diagnose the trouble correctly. The routine maintenance in question consists of servicing the oil pressure relief valve to make sure it's doing its job, as described in these two threads: thread 1, thread 2. Then adjust your engine idle speed so that it is correct use an accurate mechanical oil pressure gauge as Slanted Opinion suggests, to determine what your actual oil pressure is in gear at idle when hot. If it is within specs, then replace the oil pressure sender. |
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| Author: | SlantSixDan [ Thu Sep 25, 2008 11:44 am ] |
| Post subject: | |
It isn't serious. Servicing the oil pressure relief valve requires no special tools, and won't take you long. And if you don't want to buy an oil pressure gauge, then just take an educated guess and toss in a new oil pressure sender. It's threaded into the rear of the oil pump except on certain '63-'64 engines that have it threaded into the rear of the passenger side of the block. |
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| Author: | vynn3 [ Fri Sep 26, 2008 6:24 am ] |
| Post subject: | |
Quote: It isn't serious. Servicing the oil pressure relief valve requires no special tools, and won't take you long. And if you don't want to buy an oil pressure gauge, then just take an educated guess and toss in a new oil pressure sender. It's threaded into the rear of the oil pump except on certain '63-'64 engines that have it threaded into the rear of the passenger side of the block.
Agreed. If you can't afford the time or money for a new sending unit, can you afford the time or money to rebuild your engine if you have an oil pump failure?
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