99 Cadillac Deville running hot

Asked by CaddyWoman76 Sep 18, 2016 at 04:55 AM about the 1999 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

No cracked heads, no leaks. Presssure is good, new thermostat. i checked
the purge line and it was clogged, cleared that out & it ran great for a few
days even running the A/C. I did check the purge line again for clogs, the
fluid ran out fine. Now it's decided to run hot again. it's not overheating, it's
just hotter than normal, up to 244degrees. however at that temp it's not
boiling over or smells hot. The only DTC i pulled is PCM p0113 AIR TEMP
SENSOR. does this have anything to do with it being hotter than normal?
And am I missing something. I feel like it's something so small that just
needs to be found. Please help.

5 Answers
189,525

Paul answered 8 years ago

Try this, purchase a good radiator flush, follow the instructions and do the process at least two times, so you will need to purchase two containers of the fkush. Also purchase a good heavy duty cleaner, spray the front of the of the radiator fins let the cleaner do it job, the take a hose and wash the radiator fins really good.

3 people found this helpful.
Best Answer Mark helpful
25

StarXLR answered 5 years ago

Did you ever find what the problem was in your car?? I'm having a similar problem myself. Thanks

Mark helpful

Guru94CXXH answered 4 years ago

I have a 1999 cadillac deville and I found out that I have to get a head bolt kit because I believe it is 1996 to 1999 or 2000 that the head bolts were not long enough and wear out. The kit makes it to where the heads can be put together tighter.

Mark helpful

Your Answer:

Related Questions

  • 99 Cadillac Deville running hot 5 Answers

    No cracked heads, no leaks. Presssure is good, new thermostat. i checked the purge line and it was clogged, cleared that out & it ran great for a few days even running the A/C. I did check the purge...

    1999 Cadillac DeVille Sedan FWD

    -

    Maintenance & Repair

  • 96 cadillac deville constantly runs hot 1 Answer

    I have a 96 deville thatd constantly running hot. I changed the thermostat, the radiator, and hoses.... Changed the water pump..... Still running freakin hot!! Help

    1996 Cadillac DeVille Sedan FWD

    -

    Maintenance & Repair

  • Cadillac 99 deville 3 Answers

    my cadillac is over heating i changed thermostat it seams like the thermostat dont even open up until 215 but it steadily rises from there can somone please help me.

    1999 Cadillac DeVille Sedan FWD

    -

    Maintenance & Repair

  • 99 deville stopped running wont start acts like no fuel 2 Answers

    i was driving my 99 deville and it stopped running i was driving about 50 miles a hour and when i pressed on foot feed it just started slowing down finally stopped running and i have not been able t...

    1999 Cadillac DeVille Sedan FWD

    -

    Maintenance & Repair

  • Car running hot 2 Answers

    I have a 2003 Cadillac DeVille change the water pump change the thermostat new radiator it's still running hot

    2003 Cadillac DeVille DTS Sedan FWD

    -

    Maintenance & Repair

DeVille

Looking for a Used DeVille in your area?

CarGurus has 5 nationwide DeVille listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Cadillac DeVille Questions

CarGurus Experts

  • #1
    James Sparrow
    Reputation
    4,090
  • #2
    tuff4x4
    Reputation
    3,110
  • #3
    Cynthiasmith
    Reputation
    2,840
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Cadillac Eldorado
4 listings
Used Cadillac Seville
1 listing
Used Cadillac Escalade
11 Great Deals out of 418 listings starting at $9,995
Used Chevrolet Corvette
22 Great Deals out of 1,076 listings starting at $15,000
Used Lincoln Continental
8 listings starting at $17,900
Used Chevrolet Impala
7 Great Deals out of 96 listings starting at $3,531
Used GMC Sierra 1500
130 Great Deals out of 6,516 listings starting at $3,975

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.