Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Coolant acting weird

 
Old 04-15-2019, 03:21 AM
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Default Coolant acting weird

Hey guys. So, i recently bought a 96 civic hatch with b16a2 engine (its called vti in here) and the mechanic just replaced the thermostat, the radiator cap, and the water pump. However, when im flooring it with the warm engine, the temperature starts to decrease, almost to very cold, and after that it just slowly climbs back to operating temperature. My theory is that the aftermarket radiator cap couldnt hold the pressure, and it sucks some coolant from the reservoir. I tried bleeding the air out but no succes. Is my theory possible, or should i look somewhere else?
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Old 04-15-2019, 04:36 AM
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Default Re: Coolant acting weird

Thermostat could be stuck opened or you got wrong temp thermostat thatís opening too soon once it heats to a certain temperature
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Old 04-15-2019, 04:52 AM
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I dont think that the thermostat stuck open, the engine heats up normally, but there is a possibility that its open sooner, the mechanic said its a good quality stuff (gates i think). Is this something i should really worry about? The car is in good condition and i dont want to ruin it
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Old 04-15-2019, 05:09 AM
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Default Re: Coolant acting weird

If it really is overcooling, that has to be the thermostat. Nothing else would cause that.

It could be a gauge error electrically related. If the wire to the sensor is loose the gauge will show cold even though the engine is hot.
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Old 04-15-2019, 05:29 AM
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Default Re: Coolant acting weird

Get to know your thermostat, he probably installed the wrong one. This response is based off of your OP.
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Old 04-15-2019, 05:55 AM
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Default Re: Coolant acting weird

I believe the gates thermostat are 170* F. Those lower temps thermostat help for track racing.

Stock temp is 180* F. Get you a oem thermostat.
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Old 04-15-2019, 06:01 AM
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Default Re: Coolant acting weird

OP didn't state whether he bought the parts to the mechanic to install or the mechanic supplied his own parts. This needs to be verified.
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Old 04-15-2019, 06:31 AM
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Default Re: Coolant acting weird

The mechanic bought all the stuff, he told me just the brand(mentioned earlier) not the exact type
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Old 04-15-2019, 06:37 AM
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Default Re: Coolant acting weird

Was wondering also why was it in the shop on the first place???? Overheating issues... whole motor swap...

I bet you the mechanic installed the gates thermostat.

OP let us know more details why the car is in the shop.
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Old 04-15-2019, 06:45 AM
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Default Re: Coolant acting weird

It was for a timing belt/water pump change, and they said its better to change the thermostat too
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Old 04-15-2019, 07:01 AM
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Default Re: Coolant acting weird

I had a b18a1 teggy and I was wondering like you also why does the needle moves to cold while driving then sitting idle itíll raise back to normal temp.
Then found out it had aftermarket thermostat. I changed it back to oem specs thermostat and ran normal. Then I sold it.

But having a thermostat that doesnít let the engine warm up to normal operating temperature can affect the fueling map, the ecu reading the engine isnít warmed up properly and itíll throw more fuel in.

so if I were you Iíd get him to change it back to oem specs.
But itís your choice.
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Old 04-15-2019, 07:27 AM
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Default Re: Coolant acting weird

Originally Posted by Honda_HUN View Post
The mechanic bought all the stuff, he told me just the brand(mentioned earlier) not the exact type
duh duh DDDDUUUUHHHH
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Old 04-15-2019, 08:50 AM
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Thanks guys for the help, i just ordered an OEM one, but its a good 1-1,5 months until it gets here, until that, should i use my car?
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Old 04-15-2019, 08:51 AM
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Originally Posted by Honda_HUN View Post
Thanks guys for the help, i just ordered an OEM one, but its a good 1-1,5 months until it gets here, until that, should i use my car?
Where the F did you order one from?
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Old 04-15-2019, 08:53 AM
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Originally Posted by Krauthammer View Post
Where the F did you order one from?
Amazon, there is nobody selling OEM thermostats in my country. Barely any OEM parts
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Old 04-15-2019, 09:39 AM
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Sucks
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Old 04-15-2019, 05:33 PM
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Default Re: Coolant acting weird

I think I had one layin around I could have hooked you up.
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