1993 Saturn SC1 Problems with cooling system !

Tiny
MEDICINEHAT69
  • MEMBER
  • 1993 SATURN SC1
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 223,000 MILES
I have a 1993 saturn sc1 coupe I have just recently had over heating problems due to the engine fan being defective. I had a new one installed and they changed the thermostat it seems to still be over heating the engine fan doesnt seem to kick in on its own only when the AC is turned on then it will kick in but still isn't blowing cold air? Could this be a problem with the water pump and PCM not properly working I have no idea on what could be wrong with it. Aswell if the car seems to be clunking could this be the transmission fluid is low and isnt working is this causing the car to over heat more
Saturday, August 21st, 2010 AT 12:20 PM

4 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS


https://www.2carpros.com/forum/automotive_pictures/416332_1993_SL1_coolant_temp_sensor_3.jpg


I would first replace your coolant temp sensor it's the bottom one with the two wire's going to it.Also make sure that the connector going to it isn't corroded if it is then you will have to replace the connector too.The sensor is only 10 make sure you get a brass tipped one the plastic tipped one's crack.Check and make sure your transmission fluid is full and red and doesn't smell burnt.Also what do you mean your transmission clunk's?When does it clunk?Do you have any trouble code's in the computer?What are the high and low pressure's of your a/c at idle?If your a/c clutch kick's on and it doesn't get cold i will need to know what the pressure's are to help you further with your a/c concern.
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Saturday, August 21st, 2010 AT 1:39 PM
Tiny
MEDICINEHAT69
  • MEMBER
  • 9 POSTS
Yes umm I may want to check the water pump it seems the engine fan does not kick in on its own there was no noticable leaks and they changed the engine fan however and bled the system. They did not run water through the system to get it clean just dropped the thermostat. The transmission clunks into gear when changing in every gear im not to sure how the texture of the tranny fluid and getting your tranny pan dropped and filter changed is that expensive? Iam currently driving day to day just to work how should I get on this problem with out killing my car it is still still always running 3/4 hot could this be the seal in the water pump
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Sunday, August 22nd, 2010 AT 12:22 PM
Tiny
MEDICINEHAT69
  • MEMBER
  • 9 POSTS
The engine fan not kicking in must be a problem with the fuses or temp sensor also for the transmission it just clunks doesnt really slip into gear it just clunks and make it difficult to accelerate like it did before? This is a very complicated problem and I have no idea about how to fix this problem
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Sunday, August 22nd, 2010 AT 12:25 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If the fan come's on with the a/c but not on it's own then you need a new coolant temp sensor like I said and to also check the connector for being corroded.I even posted a diagram of where the sensor was. That will take care of that problem. Your fan will turn on from 3/4 on the gauge to the tip of the red. It's really common for a bad coolant temp sensor on that model so I would just change it. Make sure the engine is cold and you will loose a little coolant. As far as a transmission service there is no pan to drop. It's like changing oil there is a drain plug and spin on filter. If the fluid is red then your ok you change the fluid every 30,000 mile's. If it shift's hard in every gear then most likely you have too much pressure in the forward gear's. That would most likely be the valve body. But you would have to test the transmission pressure.
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Sunday, August 22nd, 2010 AT 12:45 PM

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