Gramentz
02-06-2007, 11:23 AM
S14 KA is still overheating. There's a brand new radiator and thermostat in. There are no coolant leaks. Car warms up like normal, then anywhere from 5-15 minutes later at idle, it will start to overheat. This is not the original KA that came with the car, if that matters at all.
Cliff notes:Lower rad. hose never gets warm, no coolant leaks, normal compression, system has been bled, heater doesn't blow warm air/hot air.
Heater rarely blows warm/ hot air. Sometimes it will, sometimes it won't.
The lower radiator hose never gets warm or hot, regardless of the temp.
Water pump does not leak and does not appear to be defective/worn etc.
I am using the stock clutch fan WITH shroud.
I have bled the system, and no matter how long the bleeder screw is open, coolant does not seem to be pushed out. If the overheating problem is in fact a giant bubble in there, the lower hose should still get warm/hot, right?
Compression results: Upon first warm-up, cylinders 3 and 4 looked abnormally low. (around 150-160s compared to cylinders 1 and 2 of around 190s.) Also upon first startup, you could smell coolant burning. I didnt think much of this, some spilled while I was filling it up.
It did not overheat at first warm up. It only started to over heat when I went for a drive, even then, the car was shut off no longer than 10 seconds later. After that drive, I replaced thermostat thinking that that is why the lower hose never gets hot. Wrong, new thermo still does not solve that problem. Yes, spring is toward the back and the little hole is facing north
Another compression test: All cylinders were above 190 and did not vary more than 20psi. Cylinder number 4s spark plug looked blackish and corroded where it seals. These are brand new plugs.
The spark plugs were a PITA to remove at first when I replaced them before first start-up. They seemed seized and cylinder number 4 looked the worst and rusted/corroded threads. This is why a warped head is crossing my mind.
Does this sound like a warped head/bad HG?
Cliff notes:Lower rad. hose never gets warm, no coolant leaks, normal compression, system has been bled, heater doesn't blow warm air/hot air.
Heater rarely blows warm/ hot air. Sometimes it will, sometimes it won't.
The lower radiator hose never gets warm or hot, regardless of the temp.
Water pump does not leak and does not appear to be defective/worn etc.
I am using the stock clutch fan WITH shroud.
I have bled the system, and no matter how long the bleeder screw is open, coolant does not seem to be pushed out. If the overheating problem is in fact a giant bubble in there, the lower hose should still get warm/hot, right?
Compression results: Upon first warm-up, cylinders 3 and 4 looked abnormally low. (around 150-160s compared to cylinders 1 and 2 of around 190s.) Also upon first startup, you could smell coolant burning. I didnt think much of this, some spilled while I was filling it up.
It did not overheat at first warm up. It only started to over heat when I went for a drive, even then, the car was shut off no longer than 10 seconds later. After that drive, I replaced thermostat thinking that that is why the lower hose never gets hot. Wrong, new thermo still does not solve that problem. Yes, spring is toward the back and the little hole is facing north
Another compression test: All cylinders were above 190 and did not vary more than 20psi. Cylinder number 4s spark plug looked blackish and corroded where it seals. These are brand new plugs.
The spark plugs were a PITA to remove at first when I replaced them before first start-up. They seemed seized and cylinder number 4 looked the worst and rusted/corroded threads. This is why a warped head is crossing my mind.
Does this sound like a warped head/bad HG?