Car heating up on the highway?

[1988SupraDreams]

So if I'm understanding correctly here, the engine getting a little hot should be little cause for worry? Also, I would really appreciate it if someone could explain to me how a high OAT coolant will impact how the radiator transfers heat to the air versus a phosphate coolant.

 

[jdub]

Tell you what Hommer, why don't you study this and tell me how it's just like a Chevy or Ford:
http://www.cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?Section=CO&P=2

The biggest thing is the volume of the water pump...why do you think IJ added an electric booster pump for low RPM city/stop/go driving.

Plus, what you said about the time coolant is in the radiator is flat wrong...heck, a lot of Chevy/Ford guys remove the thermostat all together.

In a general sense, it is no different.

CyF - 210 degs is borderline...I'm not sure about the quality of that radiator either. Check your timing as suggested. You didn't answer about what kind of fan clutch...I assume it's an NA because this is a GE motor?

SD - OAT = Outside Air Temp...sorry about that, I didn't use it to mean Organic Acid Technology
The G-05 coolant you are using is actually HOAT (Hybrid Organic Acid Tech)...OAT or HOAT coolant will not significantly affect heat transfer, it is the anti-corrosion package in the coolant.

 

[jetjock]

what excally makes this cooling system so much diferant then the rest of the millions of cars on road ?

Not much. That's the point. Yours seems to be that since you saw 5-7 cars run hotter with the t-stat removed they were designed to do that. Or that any cooling system is designed to. I was once behind a car on the highway whose trunk suddenly exploded in a fireball. Was that typical behavior for the model?

And while cooling systems may be "funny things" to the average wrench monkey for others they are not. That's like saying electricity is a funny thing. Nonsense. To the uninitiated their behavior may seem odd at times but both follow well defined and widely understood laws of nature.

As for you feeling lucky to smoke I have no defense against that kind of logic...

 

[CyFi6]

Ok, i will check my timing once i can get access to a timing light, i think one of the auto parts stores around here loans those out. I just set the timing back in june to 10 degrees btdc after i did the head gasket job, so unless something moved it should be the same, but i will verify. Yes, the car has the stock NA fan clutch with the stock NA fan. I am thinking about buying a turbo clutch and turbo fan. Is OEM the only way to go when it comes to fan clutch's?

 

[HommerSimpson]

Not much. That's the point. Yours seems to be that since you saw 5-7 cars run hotter with the t-stat removed they were designed to do that. Or that any cooling system is designed to. I was once behind a car on the highway whose trunk suddenly exploded in a fireball. Was that typical behavior for the model?

And while cooling systems may be "funny things" to the average wrench monkey for others they are not. That's like saying electricity is a funny thing. Nonsense. To the uninitiated their behavior may seem odd at times but both follow well defined and widely understood laws of nature.

As for you feeling lucky to smoke I have no defense against that kind of logic...

I guess the decades I've worked on cars.. ive seen strange things...

not READ them on a thread... acually hands on ya know.....

my point is simple.. when all the normal things check out.. look for the abnormal...

if you can not think this way.. you could never make it as a mechanic in the field...

just because YOU have not ever seen or heard of it.. does not mean it can not happen..

 

[Rennat]

Ok, i will check my timing once i can get access to a timing light, i think one of the auto parts stores around here loans those out. I just set the timing back in june to 10 degrees btdc after i did the head gasket job, so unless something moved it should be the same, but i will verify. Yes, the car has the stock NA fan clutch with the stock NA fan. I am thinking about buying a turbo clutch and turbo fan. Is OEM the only way to go when it comes to fan clutch's?

you said you had the n/a clutch rebuilt, so why not just buy a used turbo clutch and if its bad rebuild it? cause from the dealer is like 160? its not cheap...

 

[bountykilla0118]

ohh boy

edit: Let explain what I meant.... Hommer I understand what u are saying but that logic as a mecahnic working on other people's cars can get u in trouble.... it can fix one thing and offset something else. I believe you should fix the problem and not put a band-aid on it.

I personally dont run a T-stat in the summer for my own personal comfort b/c in Atlanta it is fuckin hot and we have a lot of traffic during rush hour and i like seeing my temp hanging around 180(+/-)..... JJ and JD might not agree but all they can really say is that I will cause the car to run richer which to be honest hasn't really effected my MPG and I have been without a T-stat in the summers for years with my red NA and my white Turbo.

It works for me and it hasnt harmed one thing!

 

[jdub]

I guess the decades I've worked on cars.. ive seen strange things...

not READ them on a thread... acually hands on ya know.....

my point is simple.. when all the normal things check out.. look for the abnormal...

if you can not think this way.. you could never make it as a mechanic in the field...

just because YOU have not ever seen or heard of it.. does not mean it can not happen..

And I've seen more mechanics than I can count come up with some of the most out-to-lunch logic as to why something works or does not work on a motor...seen quite a bit here too. Usually because they really don't know and create some off-the-wall reasoning for it. Experience is a great thing when it has knowledge backing it up...it gets expensive when you "guess".

 

[Rennat]

And I've seen more mechanics than I can count come up with some of the most out-to-lunch logic as to why something works or does not work on a motor. Usually because they really don't know and create some off-the-wall reasoning for it. Experience is a great thing when it has knowledge backing it up...it gets expensive when you "guess".

i've fixed several friends cars because the mechanic 'said' it was wrong... amazing things happen when you replace the spark plugs and wires... i saved a girl $150 because i cleaned off her o2 sensor.

and i love reading about other peopls problems with supras, because then when i have that problem, i already know what to fix. so it helps me out to read about stuff. not just go and tear into my car.

 

[bountykilla0118]

i've fixed several friends cars because the mechanic 'said' it was wrong... amazing things happen when you replace the spark plugs and wires... i saved a girl $150 because i cleaned off her o2 sensor.

and i love reading about other peopls problems with supras, because then when i have that problem, i already know what to fix. so it helps me out to read about stuff. not just go and tear into my car.

I agree with that!

 

[HommerSimpson]

And I've seen more mechanics than I can count come up with some of the most out-to-lunch logic as to why something works or does not work on a motor...seen quite a bit here too. Usually because they really don't know and create some off-the-wall reasoning for it. Experience is a great thing when it has knowledge backing it up...it gets expensive when you "guess".

if you think having a lower rad hose suck shut or a thermostate being out cause a car to run hot is out to lunch thinking..... we might need to take a pole on who is right and who is wrong...

 

[bountykilla0118]

hommer i dont think our lower hose can be sucked shut considering the way the coolant flows..... i havent seen it happen even with 15yr old hose unles the radiator is completely empty

 

[1988SupraDreams]

Ah, thanks for the clarification Jdub.

 

[easternguy2005]

Perhaps the temp sensor is going - I mean usually they fail or don't fail but you never know. I mean after riding if you open my hood its real hot and you would think its running hot.
How do you "know" its running hot.

 

[jdub]

if you think having a lower rad hose suck shut or a thermostate being out cause a car to run hot is out to lunch thinking..... we might need to take a pole on who is right and who is wrong...

Ok Hommer...you're on

Just for clarification, I'm saying a thermostat stuck open or not there at all will not cause a overheat.
And, I've never seen a lower rad hose on this car collapse.

 

[IJ.]

OP: If your Damper has slipped and you set the timing to 10 degrees it may be wrong, running retarded WILL cause your symptoms......

210 at cruise is DAMN hot add any sort of load on top of that and you're going to have a problem.

Pull #1 plug

bring the piston part way up by turning the bolt on the damper

Sit a chopstick on top of the piston

turn the crank and watch the chopstick, when it stop rising look at the timing marks.

report back.

As for "losing coolant" guess no one has noticed the drain cock on the bottom of the radiator?

 

[Poodles]

:3d_frown:

So much disinformation in this thread...

The reason I asked if the waterpump has ever been changed was because of the crappy cast impeller ones one the market. Someone on the forums had one fall apart. Have not heard of a stamped impeller failing yet...

Try an OEM T-stat, had a stant on my car and the temps kept fluctuating a lot, put an OEM one in and it warms up faster and stays at the proper temp.

EDIT: Never seen a lower radiator hose collapse, but I have seen the upper radiator hose expand and collapse...

 

[jdub]

Yeah, I've never used the regular Stant thermostats...only the SuperStat. Worked as well as OEM for me.

I've seen the upper hose collapse too

 

[CRE]

As for "losing coolant" guess no one has noticed the drain cock on the bottom of the radiator?

Or if it's aftermarket, just use some thin tubing an siphon some out into a clean container.

 

[IJ.]

Or if it's aftermarket, just use some thin tubing an siphon some out into a clean container.

Direct fit AM Rads have the drain as well