Performance & Maintenance Engine, forced induction, intakes, exhausts, torque converters, transmissions, etc.

Overheating

Thread Tools
 
Search this Thread
 
Old 08-25-12, 09:41 AM
  #1  
eknine9
Lexus Test Driver
Thread Starter
iTrader: (8)
 
eknine9's Avatar
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 1,087
Likes: 0
Received 2 Likes on 2 Posts
Default Overheating

Guys, quick question. Car is overheating and I've checked a few things, but am wondering what certain symptoms would be for specific parts of the car that would cause overheating.

In my last car when the water pump goes out there'd be a little leak around the lip of it, when the water pump goes out on this car, what kind of symptoms would there be? What about the radiator? The engine fan is working properly, and there aren't any obvious or major leaks under the car and I haven't found any coolant leaks either.

Coolant level is topped off and oil level is also fine.

Could the thermostat be stuck open? Would that cause overheating?
Are there any other things I could be overlooking here?

1992 SC300 5speed
Old 08-25-12, 09:46 AM
  #2  
ihiryu
Lexus Champion
iTrader: (7)
 
ihiryu's Avatar
 
Join Date: Oct 2007
Location: tx
Posts: 1,668
Likes: 0
Received 2 Likes on 2 Posts
Default

It would be stuck closed.

When the car is at operating temp, check the lower radiator hose and see if it's hot. If it's cooler than the top hose, then you've got a stuck radiator.

What part of texas are ya at?
Old 08-25-12, 09:51 AM
  #3  
eknine9
Lexus Test Driver
Thread Starter
iTrader: (8)
 
eknine9's Avatar
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 1,087
Likes: 0
Received 2 Likes on 2 Posts
Default

I'm up in Lubbock for school.

The car has been off for about 5 minutes, and the lower hose is way cooler than the upper hose. So this means I'm going to need an entire new radiator? Are there any good vendors to buy a radiator from online?
Old 08-25-12, 10:24 AM
  #4  
scmaluco
Driver
iTrader: (6)
 
scmaluco's Avatar
 
Join Date: Mar 2012
Location: ca
Posts: 175
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by eknine9
I'm up in Lubbock for school.

The car has been off for about 5 minutes, and the lower hose is way cooler than the upper hose. So this means I'm going to need an entire new radiator? Are there any good vendors to buy a radiator from online?
before you start spending money try flushing it first and go from there..
Old 08-25-12, 10:31 AM
  #5  
eknine9
Lexus Test Driver
Thread Starter
iTrader: (8)
 
eknine9's Avatar
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 1,087
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by scmaluco
before you start spending money try flushing it first and go from there..
Won't I have to leave the engine running while the flush liquid is in the radiator? The car overheats before too long. Will I be able to flush it properly, or are you suggesting just a drain and refill?
Old 08-25-12, 11:02 AM
  #6  
ihiryu
Lexus Champion
iTrader: (7)
 
ihiryu's Avatar
 
Join Date: Oct 2007
Location: tx
Posts: 1,668
Likes: 0
Received 2 Likes on 2 Posts
Default

You need it to run a bit longer than that bro. Five minutes is definitely not enough.
Old 08-25-12, 11:14 AM
  #7  
eknine9
Lexus Test Driver
Thread Starter
iTrader: (8)
 
eknine9's Avatar
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 1,087
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by ihiryu
You need it to run a bit longer than that bro. Five minutes is definitely not enough.
The car was past normal operating temperature when I turned it off, just short of the red bar according to the gauge. It had been off for 5 minutes when I touched the hoses to check temperature.
Old 08-26-12, 12:23 AM
  #8  
ihiryu
Lexus Champion
iTrader: (7)
 
ihiryu's Avatar
 
Join Date: Oct 2007
Location: tx
Posts: 1,668
Likes: 0
Received 2 Likes on 2 Posts
Default

Yup well seems like we've got a winner.
Old 08-26-12, 09:24 AM
  #9  
scmaluco
Driver
iTrader: (6)
 
scmaluco's Avatar
 
Join Date: Mar 2012
Location: ca
Posts: 175
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by eknine9
Won't I have to leave the engine running while the flush liquid is in the radiator? The car overheats before too long. Will I be able to flush it properly, or are you suggesting just a drain and refill?
i would recommend flushing it with a hose.. engine off. disconnect both hoses and flush it out connect everything top it off with water and let it warm up. then repeat the process . see if it helps.. you should be able to see how much water is flowing out thru the bottom and if there any gunk or what not coming out...
Old 08-26-12, 03:01 PM
  #10  
soarer13oy
Lexus Champion
iTrader: (13)
 
soarer13oy's Avatar
 
Join Date: Feb 2008
Location: Sacramento
Posts: 2,187
Likes: 0
Received 0 Likes on 0 Posts
Default

Just stick a water hose on the upper radiator and run water through the radiator. Make sure you remove the lower radiator hose to see if it flows well.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dupshaw123
IS F (2008-2014)
10
07-02-19 10:50 PM
lanthern22
GS - 1st Gen (1993-1997)
5
01-06-10 08:31 AM
madmax98
ES - 1st to 4th Gen (1990-2006)
4
05-13-08 10:18 PM
Lexus082
Performance & Maintenance
8
11-27-07 01:31 PM
ztikmedia
Performance & Maintenance
9
09-01-03 01:59 AM



Quick Reply: Overheating



All times are GMT -7. The time now is 04:40 PM.