Real High Oil Temperatures on Maggied V
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2004-2007 Cadillac CTS-V General Discussion Discussion, Real High Oil Temperatures on Maggied V in Cadillac CTS-V Series Forum - 2004 - 2007; Yesterday I was driving down the freeway way at normal speed (80F outside) when my oil temp warning goes off. ...
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    OneFast V is offline Cadillac Owners Enthusiast
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    Real High Oil Temperatures on Maggied V

    Yesterday I was driving down the freeway way at normal speed (80F outside) when my oil temp warning goes off. I have done the grounding fix and prior to the maggie it worked great. I pulled off into a gas station and I could smell a distinct burning. I pulled the dipstick to check the oil level and smoke came out! The temperatures are sporadic, moving between 270-330F but always reading very high. I have a feeling the oil is actually getting this hot. What should I check first? I could not find any posts with similar issues.

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    darkman's Avatar
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    Re: Real High Oil Temperatures on Maggied V

    What are your coolant temperature and oil pressure levels doing when the oil temperature gets high?

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    mstrjon32 is offline Cadillac Owners Enthusiast
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    Re: Real High Oil Temperatures on Maggied V

    FWIW, when I pull the dipstick immediately after shutting the engine down, I always get smoke. The dipstick tube is right next to the manifolds, which are quite hot.

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    Re: Real High Oil Temperatures on Maggied V

    The fact that the temperature is moving around indicates to me that it's not accurate (in other words, that you've got an electrical issue again). The oil temp sensor is in the oil pan sump measuring the temperature of what should be a pretty good pool of oil. Oil doesn't change temperature in either direction quickly - it heats up more slowly than the coolant, and then it retains heat longer than the coolant.
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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: Real High Oil Temperatures on Maggied V

    Quote Originally Posted by darkman View Post
    What are your coolant temperature and oil pressure levels doing when the oil temperature gets high?
    45psi@ 70mph and 195F for engine coolant temp nd up to 201F when i was slowing down. Today it was consistently 275F to 280F on the freeway. I am concerned more because of the burning smell.

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    Re: Real High Oil Temperatures on Maggied V

    Quote Originally Posted by OneFast V View Post
    45psi@ 70mph and 195F for engine coolant temp nd up to 201F when i was slowing down. Today it was consistently 275F to 280F on the freeway. I am concerned more because of the burning smell.
    As AAIIIC reported, the signature of the faulty sender/ground condition is erratic oil temperature levels since the actual oil temperature simply cannot change in either direction very quickly. How erratic is has the oil temperature been? Your coolant temps don't seem to indicate a hot engine although the oil pressure seems on the low side of normal. I would change out the sender and redo the grounds before I went looking for other, more expensive causes. Finally, you could check the temperature of the oil filter/oil pan with an infrared thermometer (cheap at Radio Shack) after a high temperature drive.

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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: Real High Oil Temperatures on Maggied V

    when im cruising on the freeway, the oil temperature appears to be very consistent. When i start to slow down and got off the freeway the readings then start going all over the place. I have redone the grounding spot multiple times, cleaned it off with a wire brush and added a star washer, so I'm not sure what else i could do for that ground. what is normal operating oil pressure? when i come to a stop or slow down the pressure drops to 32-36psi.

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    Re: Real High Oil Temperatures on Maggied V

    I believe oil pressure, once completely warmed up, is around 55psi when cruising. The fact that the oil temp goes "all over the place" under any circumstances leads back to guage system. If the grounds are good then it must be the sender.

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    Re: Real High Oil Temperatures on Maggied V

    Idle after warm up is between 32 and 36 psi with about 10 psi increase for every 1k rpm (roughly).

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    Re: Real High Oil Temperatures on Maggied V

    As a point of reference, I just drove 275 miles this afternoon at an average speed of 79 MPH (~2,200 RPM) in about 80 deg F air and watched my coolant temp (solid 195 deg F) and oil temp (steady 219-221 deg F) and oil pressure (129 psi). Forget that last one.
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    Re: Real High Oil Temperatures on Maggied V

    Quote Originally Posted by rand49er View Post
    As a point of reference, I just drove 275 miles this afternoon at an average speed of 79 MPH (~2,200 RPM) in about 80 deg F air and watched my coolant temp (solid 195 deg F) and oil temp (steady 219-221 deg F) and oil pressure (129 psi). Forget that last one.
    "80 deg F" - must have a bloody cold front up there. That is a night time low down south.

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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: Real High Oil Temperatures on Maggied V

    at idle i'm at 33 psi, at 2000 45 psi and 55psi at 3000 rpm which seems normal.

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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: Real High Oil Temperatures on Maggied V

    Does the CTS-V have an oil cooler bypass valve? it seems like something that could be stuck open if it indeed has one.

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    Re: Real High Oil Temperatures on Maggied V

    No oil cooler and no bypass valve. A lot of folks on this forum have had the problem with the high oil temperature. I don't recall any instances where the problem turned out to have a cause other than the gauge system itself (sender, wiring, grounds).

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    Re: Real High Oil Temperatures on Maggied V

    Quote Originally Posted by mstrjon32 View Post
    FWIW, when I pull the dipstick immediately after shutting the engine down, I always get smoke. The dipstick tube is right next to the manifolds, which are quite hot.
    Yup...that is a fact...I'll post of vid later of the smoking dipstick after an AutoBahn run....pretty common for long sessions of 5k+ rpms.....

    However....that doesn't sound like the OP's case though....

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