C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Oil Temperature question:

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Old Jun 6, 2003 | 03:02 PM
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Default Oil Temperature question:

At highway speeds my oil temp reaches temps of 240 and 250 or so even while my coolant is at 190... Is this ok? If not what could be the culprit and how could I fix it? :confused:
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Old Jun 6, 2003 | 03:29 PM
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Default Re: Oil Temperature question: (86vette19)

I think thats about normal for the dino oil, I run Mobil 1 and it runs about 205-215 in heavy traffic.
:seeya
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Old Jun 6, 2003 | 03:50 PM
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Default Re: Oil Temperature question: (C4Crazy787)

I'm running castrol and I'm at around 220 in heavy traffic.. it's just when I'm cruisin at 85 when my oil temp wants to hang in the 150s. Is that normal?
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Old Jun 6, 2003 | 04:46 PM
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Default Re: Oil Temperature question: (86vette19)

It should be running about 200-210F oil and about 180-195 coolant on the hwy. Thats what mine used to run before i did anything to it.

I think you should do a couple things:
1. Remove the radiator shroud, and clean in between the condensor and radiator. Its going to be fully blocked up in there if your temps are this high.
2. Drain and flush out the radiator, and refill. Maybe add a bottle of Water Wetter.
3. Change the thermostat to 160 or 180. In AZ, id definitely use a 160. (stock is 195). At any rate, you should replace it.
4. If you want a permanent fix, wire in a fan switch to the main fan to make it come on sooner. Either that or have someone burn you a chip to make them come on sooner. (DO NOT buy a hypertech chip).

I'm also worried that your Water Pump may not be doing the job, take a close look at its weephole. But its probably because of the blockage in the radiator shroud.

I wouldnt worry so much about oil temperature if youre running Mobil 1 synthetic, but with regular dino oil Id be uncomfortable, it breaks down at those temperatures.
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Old Jun 6, 2003 | 05:08 PM
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Default Re: Oil Temperature question: (vader86)

Thanks for the advice..

I just recently changed my water pump gasket, lower radiator hose, through in a 160 t- stat, and put in a 60/40 mixture of ethylene gylcol and water.

now my coolant temps hover around 180-190 on the highway.. it's just my oil temp that I'm worried about. On the bottle of castrol it says it's good for up to 400 degrees.. hmm.. i kinda doubt it..

EDIT: I just cleared out my shroud area recently and found newspapers.. tumbleweeds etc :eek:


[Modified by 86vette19, 3:09 PM 6/6/2003]
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Old Jun 6, 2003 | 05:17 PM
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Default Re: Oil Temperature question: (86vette19)

Then it definitely should not be running that hot, you did burp the system right?

Id add the fan switch right away.
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