oil light on at idle

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  #1  
Old 10-24-08, 10:34 AM
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oil light on at idle

1995 saturn oil light comes on at 1000 rpm,lifters not ticking,have changed sending unit,checked oil pump,blew out oil passages,could it be main bearings? can they be checked without pulling motor thanks Vern
 
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  #2  
Old 10-24-08, 11:26 AM
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When you say you checked the oil pump, what you did you do there? I think I would get a gauge on it to see what pressure you actually have.

If you have a problem with main bearing tolerances, you aren't that far away from a a lower end workover = rod bearing/mainbearing, and a possible crank grinding. All that would require a removal of the engine.

You may want to think about using a heavier oil or an additive to beef up the viscosity. It all depends where you want to wind up with the engine and the condition of the rest of vehicle.
 
  #3  
Old 10-24-08, 02:18 PM
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As mentioned, install a mechanical oil pressure gauge on it to confirm you really do have a problem. It might just be a oil pressure sensor problem!
 
  #4  
Old 10-24-08, 02:56 PM
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Originally Posted by marbobj View Post
When you say you checked the oil pump, what you did you do there? I think I would get a gauge on it to see what pressure you actually have.

If you have a problem with main bearing tolerances, you aren't that far away from a a lower end workover = rod bearing/mainbearing, and a possible crank grinding. All that would require a removal of the engine.

You may want to think about using a heavier oil or an additive to beef up the viscosity. It all depends where you want to wind up with the engine and the condition of the rest of vehicle.
removed and visually checked oil pump
 
  #5  
Old 10-24-08, 06:45 PM
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I think putting a gauge on it would be a good idea. There are typically pressure relief valves to regulate pressure. If it has a problem it may not be as obvious as, say, scoring or a drive issue.
 
  #6  
Old 10-25-08, 01:59 PM
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marbobj is correct, and another indication of a stuck regulator valve would be very high pressure on a cold start due to the fact it can't open to bleed off the pressure....definetly need to put a gauge on it to see if the lower end is going south or if your dealing with a stuck regulator......also if the regulator is stuck it is part of the pump so one part fixes all
 
  #7  
Old 10-26-08, 07:51 AM
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thanks for your replys.I will put a gage on and let you know..wondering about regulator..is there a web site that would have an exploded view of pump? sound more likley but we will see what gage says thanks again to all Vern
 
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