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ej2
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Discussion Starter · #1 · (Edited)
EDIT: IT WAS EARLY SYMPTOMS OF THE HEAD GASKET

It seems as though my car only overheats after 20+ min of me driving it. When I get home, the reservoir is usually full of coolant (sometimes you can see it has overflowed).

Also, the faster I go, the more the temp gauge goes down whenever the car decides to overheat. lmao.. The hell?

I just installed a new thermostat, radiator cap and new radiator. All OEM.

No white smoke. No milky coolant. Fan comes on. When bleeding my coolant today, I did see slight steam/smoke coming from the reservoir/reservoir tube.

D16 ZC Non Vtec

 

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OEM thermostat?
 

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ej2
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Discussion Starter · #5 · (Edited)
When you were touching that lower rad hose, was it hot after 20 minutes or just warm?
The video of me touching the radiator hose was after the car had completely cooled down (2 hrs).

I can confirm that the lower hose does get hot at operating temp. I've never checked after the car overheated.
 

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Discussion Starter · #7 · (Edited)
So I did this, and my fan comes on.

Does this mean that I have a bad fan switch or everything is running like it is supposed to?

Looking back, I want to say that my car only overheats after I stop for a while.

I then have to drive fast as fukk to get the temperature gauge down.
 

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so get the car warmed up, do that trick to force the fans to be on, and see if it overheats.


if the problem disappears, its a bad fan switch.

far more likely than a bad water pump or head gasket
 

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Discussion Starter · #13 ·
so get the car warmed up, do that trick to force the fans to be on, and see if it overheats.


if the problem disappears, its a bad fan switch.

far more likely than a bad water pump or head gasket
Can I drive around like that? That's really the only time it overheats.
 

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So do the fans cycle at the normal interval? Might have missed if you tried this. When you are bleeding coolant you wait till the fans come on, did they ever come on? Did you get all the bubbles out, it took me a while to get the right angle and pressure to get the air out after a complete coolant system change a couple years ago.
 

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See above...
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I remember that somehow my ground wire in the harness leading to the fan switch became broken. So I rigged up a new wire that grounded it off. My fan started working.
 

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Discussion Starter · #16 · (Edited)
What could it be man?!

COMPRESSION TEST:

190-200 PSI across the board: )






This was done with the engine cold since everything was unhooked.
 

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ej8
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Start it and let it idle for 20ish min so it can warm up.
When the temp gauge gets to half way, the fan should kick on.
If the car shows over heating but no fan then bd fan switch.

Also warm the car up with the rad cap removed.
Then pressure test the coolant system with a tester.
 

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Discussion Starter · #18 ·
Start it and let it idle for 20ish min so it can warm up.
When the temp gauge gets to half way, the fan should kick on.
If the car shows over heating but no fan then bd fan switch.

Also warm the car up with the rad cap removed.
Then pressure test the coolant system with a tester.
Car never overheats at idle. I'm letting the car idle now since I did the compression test. It's been Idling for 30 minutes now. Fan is coming on about every 1 minute (exactly) and staying on for about 10 seconds.
 

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both upper and lower hoses getting hot?
 
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