Heating issues (Page 1/4)
Monkeybean007 MAY 19, 04:14 AM
My engine overheats until I turn on my heater I only have to leave it running for a couple seconds and then can turn it off and it won't overheat for the rest of the drive. 85 gt 2.8l
Gall757 MAY 19, 09:29 PM
Something strange happening there......maybe it has to do with a bad electrical contact. Is your coolant really hot or does the gauge just say it's hot?

[This message has been edited by Gall757 (edited 05-19-2020).]

Mike in Sydney MAY 19, 09:51 PM
It sounds like there is air in the cooling system or the heater coil or possibly not enough coolant (which would mean air in the system). I had a similar problem until I followed the steps to refill that can be found in Ogre's Cave. I was also parked nose down at a 30-degree angle (steep driveway) when I refilled. Haven't had a overheating problem since.

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Mike in Sydney

Monkeybean007 MAY 20, 11:12 PM

quote
Originally posted by Gall757:

Something strange happening there......maybe it has to do with a bad electrical contact. Is your coolant really hot or does the gauge just say it's hot?




I don't know I always forget to check my coolant tubes when its happening, although the thermostat cap in the back gets hot.
Monkeybean007 MAY 20, 11:14 PM

quote
Originally posted by Mike in Sydney:

It sounds like there is air in the cooling system or the heater coil or possibly not enough coolant (which would mean air in the system). I had a similar problem until I followed the steps to refill that can be found in Ogre's Cave. I was also parked nose down at a 30-degree angle (steep driveway) when I refilled. Haven't had a overheating problem since.




I followed those steps to refill as well, and I fill it with coolant although it seems like it might be leaking from somewhere. Looks like the front so maybe the reservoir is bad ?
Patrick MAY 20, 11:23 PM

quote
Originally posted by Monkeybean007:

...it seems like it might be leaking from somewhere. Looks like the front so maybe the reservoir is bad ?



No offence... but if there are signs of coolant leaking, you are the one who's going to have to find the actual location... because the view from where the rest of us are is rather poor!
Monkeybean007 JUN 02, 07:57 PM
So in regards to earlier comments, it is definitely overheating, spiked to full temp then shot coolant out a hole in the reservour up front like a jet, pretty much emptied my coolant, had to re add and re burp the system, it will still sometimes get hot and then I have to turn heater on to get it to go back down
Mike in Sydney JUN 02, 08:54 PM
Does your radiator fan come on when the temperature spikes? Does the fan come on when the air-cond is on? If the fan doesn't come on when the coolant temperature goes up with the air-cond off, you could have a wiring or switch issue with the radiator fan. I'm pretty sure the radiator fan should run when air-conditioner compressor is operating regardless of temperature. Does that happen?

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Mike in Sydney

cvxjet JUN 02, 09:23 PM
Obviously you are really overheating- Number one thing to do before anything else is Step 1, let engine/coolant cool down, then step 2, Pop the thermo cap and pull the thermostat, then fill that opening with more coolant and reinstall the cap...Take it for a drive and see if it overheats....this will check a couple of things- A) your thermostat, and B) your waterpump....I replaced mine 20 years ago with a pump with a PLASTIC impeller- the engine overheated 3 times in a row going to work....found out the plastic impeller was slipping on the shaft (Plastic impeller expands faster than steel shaft)

When refilling coolant system, you have to "Burp" the system and top off several times- never pull the radiator cap except when draining the system.....Fill at the back until it flows out of rad' cap and then install cap....Then continue to fill at the back.
Monkeybean007 JUN 03, 05:03 PM

quote
Originally posted by cvxjet:

Obviously you are really overheating- Number one thing to do before anything else is Step 1, let engine/coolant cool down, then step 2, Pop the thermo cap and pull the thermostat, then fill that opening with more coolant and reinstall the cap...Take it for a drive and see if it overheats....this will check a couple of things- A) your thermostat, and B) your waterpump....I replaced mine 20 years ago with a pump with a PLASTIC impeller- the engine overheated 3 times in a row going to work....found out the plastic impeller was slipping on the shaft (Plastic impeller expands faster than steel shaft)

When refilling coolant system, you have to "Burp" the system and top off several times- never pull the radiator cap except when draining the system.....Fill at the back until it flows out of rad' cap and then install cap....Then continue to fill at the back.



Ya so I did the correct burping afterwards but unless I am running ac/ heater it will start to overheat, also whenever I start up the car it whines, alternator is tight belt is new, alternator is also new, but it whines for a while probably thirty seconds which makes me think waterpump? Thermostat is new as well