More Problems - L98 Running Hot
Thread Starter
Instructor
Joined: May 2011
Posts: 213
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From: Miramar Florida
Ok, I believe all of your suggestions may have gotten my issue squared away. I drained the system reinstalled the thermostat flushed the system with water then filled the cooling system. I let it idle for about a half hour and it didn't run hot where as before, it would run hot within about 15 to 20 minutes. I got a couple of more questions though. How much coolant is standard for the stock system L98 engine. Also what should my oil pressure be at idle?
Thread Starter
Instructor
Joined: May 2011
Posts: 213
Likes: 0
From: Miramar Florida
What are normal operating oil temp and pressure at idle? My oil pressure is running about 17lbs at idle and the oil temp gets up to at high as 223. The engine is no longer overheating. Are these pressures and temperature normal?
Instructor
Joined: Jun 2011
Posts: 182
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From: Bowling Green Ky
you say the oil is higher than engine? not sure my gage is accurate, either.
Instructor
Joined: Jun 2011
Posts: 182
Likes: 0
From: Bowling Green Ky
normal is different for all engines and conditions. fsm somewhere says 6 lbs min pressure at hot idle.
my 90 varies 15 to 30. oil temp never gets beyond about 130-150. stock gages, these are not linear, of course.
Team Owner
Joined: Sep 2003
Posts: 20,179
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
You might try "backflushing" the radiator. Clamp a bicycle tube to a garden hose and the lower radiator outlet and let the water run for awhile under full pressure. I have a tool that hooks to the hose with a schrader valve that introduces compressed air while flushing. This can be made by screwing a shrader valve into a garden hose nozzle or valve.
