endrop - for all your online needs

Technical Now WHAT!!! OVERHEATING?

Currently reading:
Technical Now WHAT!!! OVERHEATING?

i think we discussed this before but have you tried bleeding air from the cooling system using the bleed screws? if you car is still managing to maintain a temp it probably means fan, temp sensor and gauge are fine but something is making the cooling system hotter than it should be, such as air, or a part blockage.
 
jug said:
i think we discussed this before but have you tried bleeding air from the cooling system using the bleed screws? if you car is still managing to maintain a temp it probably means fan, temp sensor and gauge are fine but something is making the cooling system hotter than it should be, such as air, or a part blockage.
Click to expand...

No, I haven't tried bleeding air from the cooling system....
How should I do this?
note that I don't hear a flushing water noise and my heater works fine on hot and cold.
But the thing is that when the electrician changed the heater matrix (heater radiator) a couple of months ago, I think he had to bleed the system and refill it.... Do you think he might've let some air inside?
Can you please tell me the exact steps and please be specific as you can cos My Haynes Manual hasn't arrived yet and I haven't really done this kind of thing before.
Thanxalot.
 
an electrcian replaced the heater matrix 2 months ago, thats too much of a coincidence for my liking. there are bleed screws on the radiator, i bet the electrician did those, but there are also 2 bleed screws on coolant hoses that are tricky to find and he may have been missed 1 or both of them. hot air from the vents is a good sign but it doesnt mean you dont have any air trapped. has to be worth the turn of a screw to find out. i'll have to post a pic for you to show where the bleed screws are because its hard to describe. with the engine running and warm you simply turn the screw to release any air, once there is clear water coming out with no air or bubbles you tighten them back up, i usually wait 5 mins then do it again to be sure. its easy once you find the screws. they are black screws on black coolant hoses near the top of the engine (put near the top becuase air rises to top). you could always check every hose along its length to see if there's a bleed screw there, one hose was fat, one was thin, IIRC. i'll try to get a pic for you.
 
Thankyou so much Jug, I'll be waiting for the pic....
One more thing, do I open the screws one at at a time?
I mean do I open one, wait for the water to come out, tighten it and then do the second one?
 
Am I supposed to take the cap off the coolant tank while bleeding?
I'll get on it as soon as you send me the pic :)
Thankyou so much for your help.
 
hi mate, i didnt get a chance to sort a pic out for you after work, i'm in the middle of building a fence for my bro, should get it done tonight :)

i'll also send you a scan of the page from haynes so you have a guide. i'll hav to PM it to you to avoid copyright issues (y)
 
jug said:
hi mate, i didnt get a chance to sort a pic out for you after work, i'm in the middle of building a fence for my bro, should get it done tonight :)

i'll also send you a scan of the page from haynes so you have a guide. i'll hav to PM it to you to avoid copyright issues (y)
Click to expand...

Thanxalot Jug.....
I have a feeling it's gona be one heck of a fence ;)
Anyways, I'll PM you my email address so you can send me the haynes pages.
Why do I get the feeling that you sold your other Bravo? How much?
It was a heck of a car, but the new Blue one kicks maximum a$$ (y)
I'll be taking some pics o mine and showing it soon, I'd like your opinions :)
I just hope my problem is caused by some air trapped in the system....
Thanks again.
 
TheCROW said:
Thanxalot Jug.....
I have a feeling it's gona be one heck of a fence ;)
Anyways, I'll PM you my email address so you can send me the haynes pages.
Why do I get the feeling that you sold your other Bravo? How much?
It was a heck of a car, but the new Blue one kicks maximum a$$ (y)
I'll be taking some pics o mine and showing it soon, I'd like your opinions :)
I just hope my problem is caused by some air trapped in the system....
Thanks again.
Click to expand...

yeah lets hope it is just air, i got my car back on monday, with a new fan £110 :mad: really could have done with not spending that money..
 
yes i've sold the 1.6, it went for £950, sold less than 8 hours after it went on the autotrader website. i only paid 365 for it, but i spend a few hundred making it a very good example and getting a years tax and test so i only made about £300 profit. all it needed to be perfect was a new clutch, the clutch worked fine but the thrust bearing had started to whine and there was slight clutch judder pulling away in 1st when cold. if i had the time i would have done the clutch and tried to get better money, but thats life, at least she went to a fiat lover so im sure she'll get a good home.
 
OXCiD3 said:
yeah lets hope it is just air, i got my car back on monday, with a new fan £110 :mad: really could have done with not spending that money..
Click to expand...
Sorry to hear that....
In your case, the temp went to max sudenly....
In may case this happens in extreme traffic and the car manages to restore the temp once it starts moving..... I think it may be somewhat different.
Let's hope for the best....
 
My Haynes Manual came today, (horraaaaaaay), I checked the part for coolant system and under the airlock part didn't find what I need....
I don't want to bleed the system I just want to check for small airlock and get rid of it..... All I want is to know how to get the air out of my cooling system without having to bleed everything cos this has been done 2 months ago.....
Can please someone tell me exactly what to do in this case, step by step and tell me exactly where on earth are those bleed screws on a Brava 1.6 100SX mk2.....
Jug told me I need to bleed the air out of the hose screws.... Where are they?
Thanks all.
 
i think the problem began 2 months ago when you got the heater matrix replaced, i'd guess the person who changed it couldnt find the bleed screws either which is probably why you have air.

surely someone must know where the bleed screws are on the 1.6? damn it, its only 6 months since i did my 1.6 but i cant remember where they were.

try finding the heater matrix, then follow the hose's from it, if you feel along the length of them surely you will find a bleed screw somewhere.
 
Thankyou so much Jug.... I'm gonna have a look.... but I just need to get one thing straight before doing this...
First I run the engine until it's warm (center dot on the gauge) then I start by turning the bottom hose screw to release the air untill the coolant starts to run from it then I tighten it back. After that I do the same for the top hose screw. After that I turn off the engine, wait for 10 minutes then redo all the thing from the beginning. When the engine cools off I check if it needs more coolant and add it to the reservoir to keep the level between the MIN and MAX marks.
Is this the proper way to do it?
QUESTION: Should I remove the cap off the coolant reservoir during all this or not?
 
thats exactly the process. you should keep the cap on to maintain system pressure, it helps force the air out.

i hope you find that bloody bleed screw, if you cant maybe a quick drive to fiat would help, they'll probably only charge £100 + VAT to point a finger at the bleed screw for you, if they can actually find it :)
 
I'm gonna start a ew thread titled: Requesting Bleed Screws pics....
Hopefully someone will know...
Thanx Jug... I'll reply in this thread in case something new happens.
 
revsteve35 said:
have you tried the fan risitor on back of rad replacing mine and done trick..
Click to expand...

No, haven't tried that.... Can I replace it myself? Do I need to bleed the whole cooling system to replace it?
Exactly what does it look like and where is it located? Can I buy one off the market or should it be specific for Fiats?
I really appreciate your reply, thanxalot.
 
I have exactly same overheating problem in my 99 Brava 1,6 with A/C.

I have had four different Fiats before this: Bravo 1,4 / Bravo 1,2, / Marea 1,6 and Brava 1,6 without A/C. I have never had this problem before. In all the previous Fiats the temp gauge stayed in the middle all the time, so this is a new problem for me.

First I suspected the cooling fan thermoswitch but it isn?t, because Haynes manual says:
"1,6 litre models manufactured from April 1998-on are not fitted with a thermoswitch because the electric cooling fan is switched on by the control unit".

Now I have bought a new thermostat and a coolant temperature sensor and I plan change them next week. At the same time the cooling system will be drained and any trapped air expelled.
 
Classix said:
I have exactly same overheating problem in my 99 Brava 1,6 with A/C.

I have had four different Fiats before this: Bravo 1,4 / Bravo 1,2, / Marea 1,6 and Brava 1,6 without A/C. I have never had this problem before. In all the previous Fiats the temp gauge stayed in the middle all the time, so this is a new problem for me.

First I suspected the cooling fan thermoswitch but it isn?t, because Haynes manual says:
"1,6 litre models manufactured from April 1998-on are not fitted with a thermoswitch because the electric cooling fan is switched on by the control unit".

Now I have bought a new thermostat and a coolant temperature sensor and I plan change them next week. At the same time the cooling system will be drained and any trapped air expelled.
Click to expand...

Hey Classix, do you have to bleed the whole cooling system to install the coolant temp sensor?
 
You must log in or register to reply here.

Similar threads

V
Technical 1996 Fiat Bravo HGT overheating problem
Replies
12
Views
2K
SS90
SS90
O
Technical Changed Springs now car pulls to the left
Replies
0
Views
1K
Ozzy747
O
gihan798114
General What is this part called?
Replies
0
Views
1K
gihan798114
gihan798114
I
Technical What connector is this?
Replies
4
Views
1K
maniacbravo
maniacbravo
T
Technical New cutch fitted now problems
Replies
13
Views
2K
Adrian Bravo
Adrian Bravo
Back
Top