Running hot

40

Asked by Sep 20, 2015 at 08:41 PM about the 2003 Buick LeSabre Limited

Question type: Maintenance & Repair

Driving to work car started running
hot so stopped and the reservoir was
overflowing. Ended up driving to
work and pulling over when the car
would start running hot again. On the
way home the same day I filled the
radiator with water. While driving I
ran the heater all the way home and
it was blowing hot air and didn't run
hot. Drove it back to work the next
morning same thing happened,
didn't run hot. Then on the way back
home it ran hot again. I parked the
car for the night went back next day
after work and took the thermostat
out thinking it was sticking. After
removing it on the way home it ran
hot again as I got home. Next thing I
did was take the heater hoses off
and run water thru both until water
was clear. Then took off the upper
radiator hose and flushed from there
back thru the engine until the water
was clear. Put everything back
together filled the radiator with water
and cranked the car. Ran it in idle for
10 minutes then drove it for another
20 minutes. Car didn't run hot and
heater blew hot air. Then the next
morning it ran hot again so I bought
radiator flush and put it in. While I
was running it thru the system it
started to run hot again and the air
never got hot then there was slight
smoke coming from the engine. I'm
going to put the thermostat back in
and drain the flush out and put water
back in. When I run it if it runs hot
again I am all out of ideas. Help
please.

12 Answers

10

chech the temp switch that sends water temp to the computer( not the one that sends water temp to the dash)

1 of 1 people found this helpful.
9,780

Check the radiator cap to make sure it's seating tight on the radiator if the cap won't hold pressure it will do what you said ... When you fill the cooling system be sure to open the 2 small air bleed screws on the engine ... That engine is brutal to fill and gets air-bound if you don't open those 2 little screws (about 6mm)

1 of 1 people found this helpful.
40

Thank you I will check these tomorrow evening.

1 of 1 people found this helpful.
68,545

Have the upper and lower intake manifold gaskets been done? They're notorious for failure on the 3.8 L V6s. How many miles are on your LeSabre? The gaskets usually fail between 90,000 and 120,000 miles. Pull the oil dipstick a look at the underside of the oil filler cap. Is there white milky "goop" present? If so, the intake manifold gaskets have failed. It's NOT going to be a blown head gasket! The 3.8s rarely, if ever, blow a head gasket. Any water vapor coming from the tailpipe? Another indicator of an intake gasket failure on these engines. HTH. -Jim

40

Yes there was water vapor on the tailpipe last night. I'll check those gaskets. 130,000 miles and gaskets haven't been changed

1 of 1 people found this helpful.
68,545

Then you're definitely due! If you have this done, replace the plastic upper intake manifold (AKA Upper Plenum). Don't reuse the original one. They are notorious for cracking. Dorman Products sells a kit for this. Hopefully it's not leaking internally. If it is, change the oil TWICE immediately after the repair. If it's leaking externally you'll see small puddles of antifreeze on top of the engine once you remove the plastic engine top cover. Any "goop" on the dipstick or underside of the oil filler cap? HTH. -Jim

40

UPDATE: last night I pulled the thermostat housing off filled the engine with coolant as well as the radiator and reservoir. Replaced thermostat and ran the car up to running temp. The radiator hose sounded like a pump so I opened the bleed valve on thermostat housing until steady stream of coolant was coming and closed it back. Continued to let it run for another half hour before taking it for a ride. Heater was working great and it didn't run hot. Just drove it to work this morning and it ran nicely. Thank you for the help.

2 of 2 people found this helpful.
40

Oh and I did pay close attention to the tailpipe yesterday and there wasn't any water vapor nor was there any goop nor was the oil milky.

9,780

Great ,,, The only compensation we receive is your satisfaction,, Thank You

What is bad in temp on 03 .mine is running around 200 degrees

69,595

200 degrees is good. No worries.

1 of 1 people found this helpful.
20

Thank you for all your help but where are the air bleed screws on the engine

2 of 2 people found this helpful.

Your Answer

Add photo

Related Questions

  • Running hot 12 answers

    Driving to work car started running hot so stopped and the reservoir was overflowing. Ended up driving to work and pulling over when the car would start running hot again. On the way home the sam...

    2003 Buick LeSabre Limited

    -

    Maintenance & Repair

  • Car running hot 7 answers

    I have a 2005 Buick lasabre Custom it has 232719 miles.....I've changed the radiator,water pump,thermostat (twice),coolant sensor and radiator hose and it still seems to be running hot.....what cou...

    2005 Buick LeSabre

    -

    Maintenance & Repair

  • 2001 buick running hot 1 answer

    I have a 2001 Buick Lesabre custom. It has been running hot and the heat stopped working. We replaced the thermostat and the water pump was changed about 3 months ago. The radiator is cold but the...

    2001 Buick LeSabre Custom

    -

    Maintenance & Repair

  • 2005 Buick lasabre Running hot 3 answers

    I have a 2005 Buick lasabre with 232658 miles on it and it seems to be running hot.Ive changed the water pump,the radiator, radiator hose , as well as the thermostat. I've taken it to autozone for ...

    2005 Buick LeSabre

    -

    Maintenance & Repair

  • Is my 2004 running to hot

    My 2004 is running temps up to 239 degrees but my digital coolant level still reads normal...is this accurate or do I need a new radiator?

    2004 Buick LeSabre

    -

    Maintenance & Repair

LeSabre

Looking for a Used LeSabre in your area?

CarGurus has 1,949 nationwide LeSabre listings starting at $1,588.

ZIP:

Search Buick LeSabre Questions

Buick LeSabre Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,180
#2 John Saffrahn
John Saffrahn
Reputation 1,820
#3 Austin Gaboda
Austin Gaboda
Reputation 1,420
View All

Related Models For Sale

Used Buick Park Avenue
398 listings starting at $1,500
Used Chevrolet Impala
601 Great Deals out of 35,645 listings starting at $899
Used Buick Regal
163 Great Deals out of 10,573 listings starting at $4,000
Used Buick Century
859 listings starting at $2,300
Used Mercury Grand Marquis
30 Great Deals out of 1,784 listings starting at $2,250
Used Honda Accord
1,054 Great Deals out of 68,302 listings starting at $1,000
Used Cadillac DeVille
1,722 listings starting at $1,995
Used Toyota Camry
1,251 Great Deals out of 84,496 listings starting at $750
Used Ford Taurus
262 Great Deals out of 18,976 listings starting at $1,499
Used Chevrolet Malibu
1,171 Great Deals out of 79,727 listings starting at $2,500
Used Ford Crown Victoria
9 Great Deals out of 1,266 listings starting at $1,995
Used Lincoln Town Car
35 Great Deals out of 1,796 listings starting at $1,495

Used Cars For Sale

2005 Buick LeSabre Limited For Sale
3 Great Deals out of 72 listings starting at $1,999
2004 Buick LeSabre Limited For Sale
4 Great Deals out of 92 listings starting at $1,588

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.