Weird engine over heating problems.
Thread Starter
Launching!
Joined: Oct 2003
Posts: 248
Likes: 0
Weird engine over heating problems. I have a 1995 Z28 convertible with 75,000+ miles. My car has been getting pretty hot as of late (runs at 3/4 mark and sometimes over that). Their is a little red light that keeps coming on (red light under the RPM number 6). OK I was told this meant my radiator was low so I checked it. Turns out the radiator is full yet the light keeps coming on. 
Once the light comes on the engine temperature just keeps going up. Today I came home just for like 5 minutes today and when I got back in my car it was over the 3/4 mark. 
My fans do not seem to be working either so I have a fan switch on the way. But still I cannot understand why does the radiator light keep coming on even though my radiator is full. Plus even if my fans are not working my car is still heating up to quick. Could anyone help me out here please?
Thanks,
Chris
Once the light comes on the engine temperature just keeps going up. Today I came home just for like 5 minutes today and when I got back in my car it was over the 3/4 mark. My fans do not seem to be working either so I have a fan switch on the way. But still I cannot understand why does the radiator light keep coming on even though my radiator is full. Plus even if my fans are not working my car is still heating up to quick. Could anyone help me out here please?Thanks,
Chris
On The Tree
Joined: Oct 2003
Posts: 195
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From: Upstate NY
i believe one fan comes on at 190, then a 2nd at 225. the second will also come on anytime you have the a/c running. maybe you have an bubble in your coolant lines too, try bleeding it. the bleeders are just to the right of the intake elbow, they look like copper valves and can be opened with a flathead screwdriver. goodluck.
Thread Starter
Launching!
Joined: Oct 2003
Posts: 248
Likes: 0
Well this is interesting, I forgot to menition that the wires going to my air pump are melted. Maybe that has something to do with my fans not wanting to work? When I take the air pump fuse out the fans will only come on if the car is moving and the SES light stays on when the fuse is out.
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Launching!
Joined: Jul 2004
Posts: 273
Likes: 1
From: HighDesert California
my LT1 was having serious heating problems too. i had to get a 160 thermostat, manual fan switch and a new radiator. do what everyone else here suggests also.. bleed ur lines, flushing etc.
Launching!
Joined: Jul 2004
Posts: 273
Likes: 1
From: HighDesert California
Originally Posted by Loading
My car is regularily a bit over 3/4 mark. It will sit there for a couple minutes, then slowly start to go down.
not good, mine never goes over the 1/4 mark..
Launching!
Joined: Jul 2004
Posts: 273
Likes: 1
From: HighDesert California
"Loading", like mentioned before, u might have an air pocket.. try bleeding ur system. also mentioned before ur stat could b sticking, slight warp in the head, slight crack in the head gasket, weak rad cap, bad igniton timing, weak/damaged water pump etc.. could all cause ur LT1 problems.. if u want detailed step by steps on any of these, PM me and i will walk u through
-Mike
..also highly recommend a manual fans switch and 160 stat..
-Mike
..also highly recommend a manual fans switch and 160 stat..
Joined: May 2004
Posts: 1,593
Likes: 267
From: Halfway back on the Highway to Hell...again!
Replace the t-stat and make sure you bleed out the system. I have seen where air pockets get in the heads and that is exactly what happens. A 160 will cause drivabilty problems at highway speeds due to the engine going below 180* and the CPU wanting to make up for it by richining the A/F mix, thinking it's a cold motor. The programming is set to run above 180*
