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The mkiv Supra Owners Club

Overheating and losing water :(


paddynewman

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Hey guys,

 

Used Supra on friday/saturday and sunday..perfectly fine, no issues.

Went to drop brothers kid off to school today and though..that warmed up quick, wheres the hot air?

 

Dropped kid off and as we got home, saw the temp gauge rising slowly.

 

Turned engine off and suspected I was out of coolant/water.

Coolant tank was in the middle mark, but upon googling was linked to this site and about removing an airlock...upon doing so gave me hot air and a stable temperature.

 

BONUS...

 

Until this evening, where I saw again..it warmed up super quick and had freezing cold air.

 

Ive turned around and got home, plan of action is to investigate in the morning

 

-Pipes for radiator

-Radiator cap

 

The oil is still golden/brownish colour, no mayo anywhere...

 

What else should I look at? Last day off work since radiotherapy..so I need to get this done otherwise im commuting on my tiny pit bike :eyebrows:

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Hey guys,

 

Used Supra on friday/saturday and sunday..perfectly fine, no issues.

Went to drop brothers kid off to school today and though..that warmed up quick, wheres the hot air?

 

Dropped kid off and as we got home, saw the temp gauge rising slowly.

 

Turned engine off and suspected I was out of coolant/water.

Coolant tank was in the middle mark, but upon googling was linked to this site and about removing an airlock...upon doing so gave me hot air and a stable temperature.

 

BONUS...

 

Until this evening, where I saw again..it warmed up super quick and had freezing cold air.

 

Ive turned around and got home, plan of action is to investigate in the morning

 

-Pipes for radiator

-Radiator cap

 

The oil is still golden/brownish colour, no mayo anywhere...

 

What else should I look at? Last day off work since radiotherapy..so I need to get this done otherwise im commuting on my tiny pit bike :eyebrows:

 

check radiator cap is not broken and sealing well, also check for leeks in your hoses or cold spots on the rad it should have a uniform temp across it, if temp differs could be a blockage.also check your thermostat it could be seized. i am having similar problems my self at the moment going to try and flush the cooling systeme this week.

Edited by sim1987 (see edit history)
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Lack of hot air from the heater may point to an air lock in the system. No water in the passenger footwell or vapour coming out of the vents?

 

I'd replace rad cap with a new one - make sure you clean any crud off the top of the rad to get a good seal - then make sure no air is in the system.

 

Starting from cold with rad cap off, rev the engine a little using the throttle cable and you should be able to see if the coolant is moving through the rad. Replace cap and get the engine up to temperature and check for any leaks.

 

May also be a stuck thermostat.

 

Also have a read through the service manual HERE for ideas/advice.

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Starting from cold with rad cap off, rev the engine a little using the throttle cable and you should be able to see if the coolant is moving through the rad. Replace cap and get the engine up to temperature and check for any leaks.

 

May also be a stuck thermostat.

 

Also have a read through the service manual HERE for ideas/advice.

 

Yea when I was looking yesterday, I couldnt see any water fowing, but there was loads fowing across the floor this morning due the a big hole :(

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The auto rad is different to the manual rad, the bottom section is a trans cooler so if you use a manual item you'll need a remote oil cooler.

 

Yup thought so.

 

If you can get one of them you can have mine for postage.

 

I'd still try get an auto rad tho fella, i have no idea what condition mines in, may need refurbed as its been in the hut for months

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