Different L98 cooling problem
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Cruising
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From: Half Moon Bay ca
Different L98 cooling problem
Here is another L98 cooling problem... My problem is not from the coolant temp but the oil temp run hot at RPM's over 2400. I have changed The EGR valve and solenoid. If anyone has any suggestions I would appreciate hearing from you.
Jay
Jay
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From: Half Moon Bay ca
Re: Different L98 cooling problem (offershore)
The Oil Temps will run over 250 and will keep climbing to the point of lost oil pressuse. The coolant temps will follow up to 200 and hold steady. I have no problems at idle or city driving even at 100 degree weather.
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Re: Different L98 cooling problem (offershore)
Scorp508 posted something about oil temps a while back and someone suggested the sensor could be bad/corroded and sending wrong signals. Corrosion increases the resistance I guess. Check the sensor, I guess, but this wouldn't explain your loss of oil pressure... :confused:
Pro
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From: Yukon OK
Re: Different L98 cooling problem (loiq)
Corrosion increases the resistance I guess. Check the sensor, I guess, but this wouldn't explain your loss of oil pressure... :confused:
Or could be the other way around, coolant is reading too low and engine is actually at 280 degrees and the oil temp would be reading about right. Sure hope that isn't the case.
Just a guess, but IF the oil pump was not pumping enough due to a pump problem, pick up clogged, or pick up not getting enough oil. Wouldn't that cause the pressure to be low AND because of the decreased flow cause the oil to heat up. The oil pan acts as a sort of radiator to cool the oil, if the oil is not being pumped at a sufficient rate wouldn't that cause it to over heat?? I have never actually seen this and this is just a guess at what could cause both symptoms.
What is the pressure when first getting under way and everything is cool?
Pro
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From: Yukon OK
Re: Different L98 cooling problem (myblackbeauty)
When I first start out the oil pressure is normal about 45 to 60 psi.
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Re: Different L98 cooling problem (myblackbeauty)
need a slightly better description
When you crank, you get what oil pressure.
What is it after the oil temps get to say, 200F at idle and cruise.
What weight oil and brand.
how long does it take for temps to soar over 250 after you crank it, or is something else causing it that you can tell
When you crank, you get what oil pressure.
What is it after the oil temps get to say, 200F at idle and cruise.
What weight oil and brand.
how long does it take for temps to soar over 250 after you crank it, or is something else causing it that you can tell
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Cruising
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From: Half Moon Bay ca
Re: Different L98 cooling problem (vader86)
[QUOTE]need a slightly better description
When you crank, you get what oil pressure?
I don't have my car here at the office, But everything seems normal before the car warms up.
What is it after the oil temps get to say, 200F at idle and cruise?
The oiil pressure is normal until it gets past the 250 mark.
What weight oil and brand?
Mobil 1 synthetic 15W-50
how long does it take for temps to soar over 250 after you crank it, or is something else causing it that you can tell ?
It hot weather-less than an hour of driving
When you crank, you get what oil pressure?
I don't have my car here at the office, But everything seems normal before the car warms up.
What is it after the oil temps get to say, 200F at idle and cruise?
The oiil pressure is normal until it gets past the 250 mark.
What weight oil and brand?
Mobil 1 synthetic 15W-50
how long does it take for temps to soar over 250 after you crank it, or is something else causing it that you can tell ?
It hot weather-less than an hour of driving
Thread Starter
Cruising
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From: Half Moon Bay ca
Re: Different L98 cooling problem (offershore)
[QUOTE] :lurk:
My house has a gen. set so I can wait a while!
[Modified by offershore, 12:29 AM 8/15/2003][/QUOTE
I am sorry, did I miss your question. I do appriecate all of these feedback.
My house has a gen. set so I can wait a while!
[Modified by offershore, 12:29 AM 8/15/2003][/QUOTE
I am sorry, did I miss your question. I do appriecate all of these feedback.
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Re: Different L98 cooling problem (myblackbeauty)
So your pressure holds between 45-60psi and then suddenly drops to what after you hit 250F?
You shouldnt be hitting 250F anyway. Your thermostat may be stuck, and the space between the condensor and the radiator is clogged up. You cant clean that space without removing the shroud, nor can you see anything from underneath. You should also flush out the radiator.
You shouldnt be hitting 250F anyway. Your thermostat may be stuck, and the space between the condensor and the radiator is clogged up. You cant clean that space without removing the shroud, nor can you see anything from underneath. You should also flush out the radiator.
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From: Beverly, MA MA
Re: Different L98 cooling problem (vader86)
So your pressure holds between 45-60psi and then suddenly drops to what after you hit 250F?
You shouldnt be hitting 250F anyway. Your thermostat may be stuck, and the space between the condensor and the radiator is clogged up. You cant clean that space without removing the shroud, nor can you see anything from underneath. You should also flush out the radiator.
You shouldnt be hitting 250F anyway. Your thermostat may be stuck, and the space between the condensor and the radiator is clogged up. You cant clean that space without removing the shroud, nor can you see anything from underneath. You should also flush out the radiator.
Burning Brakes
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From: Beverly, MA MA
Re: Different L98 cooling problem (myblackbeauty)
I build 900 hp engines that never see 160 water temp. @ 5500 rpm for hours on end and with 2 10" oil coolers the oil still hits 320 :flag
Thread Starter
Cruising
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From: Half Moon Bay ca
Re: Different L98 cooling problem (vader86)
So your pressure holds between 45-60psi and then suddenly drops to what after you hit 250F?
You shouldnt be hitting 250F anyway. Your thermostat may be stuck, and the space between the condensor and the radiator is clogged up. You cant clean that space without removing the shroud, nor can you see anything from underneath. You should also flush out the radiator.
You shouldnt be hitting 250F anyway. Your thermostat may be stuck, and the space between the condensor and the radiator is clogged up. You cant clean that space without removing the shroud, nor can you see anything from underneath. You should also flush out the radiator.
Burning Brakes
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From: Beverly, MA MA
Re: Different L98 cooling problem (myblackbeauty)
250 oil temp is fine!!!!!!!!!!!!!! OUR OIL IS GOOD TIL 400 F
[Modified by offershore, 5:24 AM 8/15/2003] my car runs @211 - 220 oil temp @1800 rpm and 190 water temp. another 600 rpm to get up to 2400 is going to raise the oil temp even more 250 would not surprize me and the oil psi will drop then come back as the oil cools.
[Modified by offershore, 5:39 PM 8/17/2003]
[Modified by offershore, 5:24 AM 8/15/2003] my car runs @211 - 220 oil temp @1800 rpm and 190 water temp. another 600 rpm to get up to 2400 is going to raise the oil temp even more 250 would not surprize me and the oil psi will drop then come back as the oil cools.
[Modified by offershore, 5:39 PM 8/17/2003]
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From: Half Moon Bay ca
Re: Different L98 cooling problem (offershore)
Offshore,
I hope you got your electricity back. If the 250 degree oil was just a once-in-the-while thing, I would not worry about it. There is something that is not right and this problem gets worst on a hot day. It was over 100 degree weather when I completely lost oil pressure.
I hope you got your electricity back. If the 250 degree oil was just a once-in-the-while thing, I would not worry about it. There is something that is not right and this problem gets worst on a hot day. It was over 100 degree weather when I completely lost oil pressure.
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Re: Different L98 cooling problem (offershore)
@250 deg. is ok for your oil temp and your tstat will have little or no effect on your oil temp.I need those ? answered.
I'm sorry but thats not right. It should not be getting there, if the sensor is reading the correct data.
blackbeauty, have you replaced the oil temp sensor, or pressure sending unit yet. They would be the next thing to replace. If your pressure holds right now, then it probably isnt the oil pump
[Modified by vader86, 10:28 AM 8/15/2003]