running hot hot hot
06-20-2005, 12:09 AM
#1
Instructor
Thread Starter
running hot hot hot
Looking for some advice before digging into this one...
I took my car into have the ac checked at a shop I had no business bring my 964 to. They messed up the ac, and now my car is running hot. I can't think of what they would do to make this happen, and I am guessing that it is a fluke.
Here's what it does.
When I got the car a year ago, the PPI told me that the low speed (low temp?) fan on the oil cooler did not work, but that the high speed (hig temp?) did. Same for the ac condensor. So in town, I might get the temp needle at the 9 o'clock mark, but then the fan would kick in and bring the needle down the next lowest mark. After these bozos worked on my ac, the car now goes right up to the next highest mark after the 9 o'clock mark. (If this doesn't make sense I did have my wife snap a picture while driving today..don't know how to post it).
So basically, the temp needle sits at the mark below the red. I had to drive an hour and a half to get home, and it ran great, good oil pressure, not low on oil, never skipped a beat...just ran hot. I drove through town, and it did not get hotter.
I am confused because I would think that at 75 miles an hour, the air speed would negate the effect of a fan...do I have a bad thermostat or something?
I will read through Adrian's book tonight. Thanks in advance for any advice.
I took my car into have the ac checked at a shop I had no business bring my 964 to. They messed up the ac, and now my car is running hot. I can't think of what they would do to make this happen, and I am guessing that it is a fluke.
Here's what it does.
When I got the car a year ago, the PPI told me that the low speed (low temp?) fan on the oil cooler did not work, but that the high speed (hig temp?) did. Same for the ac condensor. So in town, I might get the temp needle at the 9 o'clock mark, but then the fan would kick in and bring the needle down the next lowest mark. After these bozos worked on my ac, the car now goes right up to the next highest mark after the 9 o'clock mark. (If this doesn't make sense I did have my wife snap a picture while driving today..don't know how to post it).
So basically, the temp needle sits at the mark below the red. I had to drive an hour and a half to get home, and it ran great, good oil pressure, not low on oil, never skipped a beat...just ran hot. I drove through town, and it did not get hotter.
I am confused because I would think that at 75 miles an hour, the air speed would negate the effect of a fan...do I have a bad thermostat or something?
I will read through Adrian's book tonight. Thanks in advance for any advice.
06-20-2005, 05:05 AM
#3
Three Wheelin'
I'd agree with John. You can easily prove the thermostat failure by running the car until the temp gauge reaches the 8 o'clock position and then put your hand on the right fender top just in front of the windshield. It should feel warm to the touch since the oil pipes running to the oil cooler sit just below that point. If you can't feel the heat your thermostat is toast.
The failure of the low speed fans is almost certainly because the ballast resistor in both cases has failed. It's not too expensive (although a bit of a PITA) to do.
Regards
Dave
The failure of the low speed fans is almost certainly because the ballast resistor in both cases has failed. It's not too expensive (although a bit of a PITA) to do.
Regards
Dave
06-21-2005, 11:58 AM
#4
Instructor
Thread Starter
So from what I gather, I need a new thermostat. It seems to be that I can just replaced the thermostat itself, rather than the entire housing (if I can get it apart). Any advice on where to get the parts?
06-21-2005, 01:49 PM
#5
Three Wheelin'
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You may also want to check your relays! When I went to a local import shop they started pulling my fuses and relays... They did not put them all back in the correct places. When I started my car the ABS failure light came on... They put a relay in the wrong position. Take your fuse panel cover off and verify that they have everything in the correct place!