[01deville]

I've had an '01 deville for a few years now and my engine gets so hot I can feel ALOT of heat coming through the air vents after driving for about an hour, so much I have to turn on my AC. My temp on my dash shows the car is not overheating. Someone told me that it is typical with late model devilles to run hot. Is that true?? If not what can be the cause.

Also does a hot engine enhance pinging? I've tried to research but cant find anything to states if it does or not. On hot days my car pings even though I use Chevron plus gas.

Thanks

 

[Ranger]

Don't know what you mean by "hot". Mine used to run 206-213. Cooling fans don't even turn on til 224.

You should never hear it ping, even with 87 octane. I used it for 3 years til I sold it the other day and never once heard it ping. Either you have a bad knock sensor or the EGR is sticking and needs cleaning.

Check for any stored DTC's (diagnostic trouble codes).

 

[JimHare]

Agree with Ranger - I've virtually NEVER heard a ping on any of the three Caddy's I own/have owned - I put Mobil mid-grade in the '99 and run generic regular in the ETC and 02 Deville. Any audible ping is evidence of some other problem.
As far as running "hot", I think your environmental problem has more to do with the ventilation system than the engine itself. Warm air is being sent to the dash or wherever, when it should not be.
Deville (i.e. Northstar) engines do not "run hot", per se. All three of mine hover around 200 degrees F 90 percent of the time. The absolute hottest I ever saw the '99 was 216, and I've never seen the 02 Deville's analog gauge go one block above the middle.
As noted in a "Display Mod" post in the Eldo forum, I just turned on the digital temp display on my ETC, and it seems to peg at 197 and stay there. I did manage to get it up to 202 after three WOTs the other day. To me, that's maybe not hot enough...

 

[8YrCaddy-Tech]

pinging is most likely a carbon problem....00 and current deville had terrible carbon issues, you can go to any gm dealership and get a can of "top engine cleaner spray" get the car good and hot and spray the entire can in throught the brake booster hose or the pcv hose and the once the can is gone let it sit for a few hours...then start it up and clear it out..prepare for a lot of smoke....this usually clears it up...and then once in awhile you may want to shut down on the gas...just to keep it clear...you will probably see black smoke (carbon)

 

[8YrCaddy-Tech]

oh and normal engine temp is 197-217 on hot days you may see 222-224