Strange problem

[Wael78]

Hi everybody, 

I really need your help. 

During the previous few months I noticed that the radiator fan kicks in on time when the coolant in the expansion tank is in the min level but   sometimes it doesn't for one time. When the coolant between the min and max the rad. Fan doesn't work in its appropriate time and the temp raises to 100 or 110 thus I turn it manually.
Another thing I noticed when the coolant in the min or under when the car is off but when it's on the water is over the min level. What does that mean?

There's no thermostat. The radiator switch is 68/82

[Papez]

Both problems can be caused by gas bubbles in circuit. Most common cause is bad head gasket.

[Thefeliciahacker]

i say first replace thermoswitch

[Wael78]

6 hours ago, Papez said:

Both problems can be caused by gas bubbles in circuit. Most common cause is bad head gasket.

I thought about it. How can I be sure about it?

If I used block seal will it be benefit? 

[Wael78]

3 hours ago, Thefeliciahacker said:

i say first replace thermoswitch

I replaced it so many times but the same problem still as it is. 

[Thefeliciahacker]

1 hour ago, Wael78 said:

I thought about it. How can I be sure about it?

If I used block seal will it be benefit? 

Any canned magic liquid will result in clogging your rad.
Do you see mayo under the oil cap - and/or oil in the coolant.

Has the car been running on plain distilled water or with anti-freeze.
Head gasket is usually caused by crappy old OR non existant corrsion inhibitors in your coolant
Read your op again you are running extremely aggresive thermoswitch.
I guess it all leads down to a bad road.
Make sure you ve bled the system VERY WELL it takes me 2 days to fully bleed a felly cooling system especially if you are doing it from the expansion tank which btw IS NOT the right method

Edited 2 October, 2020 by Thefeliciahacker

[Wael78]

3 hours ago, Thefeliciahacker said:

Do you see mayo under the oil cap - and/or oil in the coolant.

No I don't see mayo under the oil cap. I smell something like petrol or fuel in the expansion tank. 

 

3 hours ago, Thefeliciahacker said:

Has the car been running on plain distilled water or with anti-freeze.

The car has been running on plain distilled water. 

3 hours ago, Thefeliciahacker said:

Make sure you ve bled the system VERY WELL it takes me 2 days to fully bleed a felly cooling system especially if you are doing it from the expansion tank which btw IS NOT the right method

Explain it in detail if you please. 

THANKS for your effort. 

[RicardoM]

The correct thermoswitch is 82-87 for tropical countries.

The thermostat has to be installed. 92-87 C.

You have to use 50% antifreeze 50% distilled water.

The radiator has to be in perfect condition.

The cooling system has to be thoroughly flushed as you have already been told.

 

Only if you apply ALL the above advice, you will get decent engine cooling. By the way, there is nothing strange in your issue.

 

Read this reply too:

 

[Wael78]

First of all thank you Ricardo for your reply. 

The fan switch I'll get one that you recommended. I know you may get annoyed of telling us (Egyptians) to apply the thermostat ; but to find the thermostat you recommend is fantasy, if you find it, it will be used. 

Although I promise you I'll get one. 

The radiator is in a perfect condition. 

I flushed the cooling system throughly last week the photo attached will show you a disaster. 

The coolant is easy to apply. 

The last thing I want to tell you is that when the coolant between the min and max the thermoswitch doesn't work properly 

[mturgut]

I use 88 thermostats and 85-80 fan switches in my vehicle.

the vehicle does not see 100 degrees at all (max.96c)

"In a problem I encountered before, the clogged heater radiator decreased the cooling performance."

Edited 3 October, 2020 by mturgut

[RicardoM]

10 hours ago, Wael78 said:

I flushed the cooling system throughly last week the photo attached will show you a disaster. 

Well, that happens when you are using only distilled water. Corrosion. Will that affect the cylinder head and block? You bet.

Here is a cylinder head that needed welding because it was so badly corroded.

 

[Thefeliciahacker]

Based on the condition of your coolant I will say the cooling system is STILL not clean enough.
I would suggest filling it up with just distilled water driving for 3-5 days then draining it and repeating the procedure at least 3 times.
Maybe adding a bit of coolant flush in there (I don't do it but if it is sooooo dirty you better do it).
Now smell of gas in the coolant is worrysome.
But lets not go down that road yet.
I will explain the factory and then my bleeding method.
Factory:
Remove temperature sender

Open expansion tank cap

Add coolant through temperature sender hole

Squeeze tap and vibrate all hoses

Fill it up until it overflows

Put sender back in and clip it

Make sure coolant level is between min and max

 

My version:

Put coolant through the expansion tank until max

Start the engine with cap off

Turn heater on speed one

Squeeze hoses

Rev engine to 2-3k rpm and hold it there

Make sure you get heat

If you dont or temperature goes too high rev a bit higher

Let the car do 3 fan cycles

Let it cool down 

Put the cap back on

Drive the car and let it do one proper heat cycle.
Remove cap (with the engine cold)
Top up coolant between min and max)

Close cap and let the car idle

If temperature stays the same though many fan cycles you are succesfully bled.
If not repeat from step 2

Edited 3 October, 2020 by Thefeliciahacker

[Wael78]

3 hours ago, RicardoM said:

Well, that happens when you are using only distilled water. Corrosion. Will that affect the cylinder head and block? You bet.

Here is a cylinder head that needed welding because it was so badly corroded.

 

Well. You say that I have a problem with the cylinder head and block? 

If I understood your words correctly, please, tell me how to deal with that problem. Is it okay to use block seal for a short time then I'll deal with the cylinder head. What are the measurements of the head cylinder. 

Many thanks in advance. 

Edited 3 October, 2020 by Wael78

[RicardoM]

2 hours ago, Wael78 said:

Is it okay to use block seal for a short time then I'll deal with the cylinder head.

Not OK. It will be a nightmare to get it out from the coolant system.

2 hours ago, Wael78 said:

Well. You say that I have a problem with the cylinder head and block? 

If nothing helps with overheating, then it might be possible to have a small crack in the head gasket.

By the way, what is the temperature in Egypt now? Minimum and maximum.

[Wael78]

49 minutes ago, RicardoM said:

By the way, what is the temperature in Egypt now? Minimum and maximum.

From 39 to 31 for max and from 27 to 23 for min. 

50 minutes ago, RicardoM said:

If nothing helps with overheating, then it might be possible to have a small crack in the head gasket

OK. I'll see. Do you have any other piece of advice you want to recommend me? 

[RicardoM]

Just keep an eye on the level of coolant (antifreeze + distilled water). If it drops below minimum 'mysteriously' yet  you don't see any leak, then there is a problem.

Look for any strange color of exhaust gases.

[Wael78]

30 minutes ago, RicardoM said:

Just keep an eye on the level of coolant (antifreeze + distilled water). If it drops below minimum 'mysteriously' yet  you don't see any leak, then there is a problem.

Look for any strange color of exhaust gases.

OK. I'll do it. 

THANKS a lot.