P reg (1998) Toyota Celica 2.0 GT - Toyota Celica Overheating Problem

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Fri 22 Oct 2010 11:28
P reg (1998) Toyota Celica 2.0 GT - Toyota Celica Overheating Problem - dallypro
Hi

My Celica 2.0 GT has a strange overheating problem. I will try to describe it as clearly as possible, but i really do not know where to start with regards to fixing it.


1. The car started having overheating problems around 6 months ago. I narrowed this down to the radiator having a slight leak in the top left hand corner, on the seam. I fixed this using a metal resin which cured the problem.

2. During the original heating problem, it did lose a little bit water due to it bubbling through the seam.

3. The day before yesterday, the car overheated again. I opened the bonnet to find that my original repair had failed. I have since re-done the repair and sealed the small leak....but......and here is where it gets strange;

4. The car is still overheating, and i cannot get any heat to come out of the blowers unless.......

5. I undo the radiator cap. If i undo the radiator cap then the blowers stay cold until i accelerate hard. If i accelerate hard the blowers go very hot, and then return to cold when i back off. Also, the car does not overheat with the radiator cap off (no matter how it is driven. even stopped in traffic it was fine)

6. It is using a fair amount of water, which i am assuming i am losing in steam. If i drive the car hard, the temperature gauge does not overheat but when i stop there is a lot of steam coming out of the loose radiator cap.

Can you see why i am baffled?!?!?!

I have some basic knowledge on car maitainence, but this is the first time i have had an overheating problem........so please reply like i know nothing!!!

Thank you in advance for any assistance you can give.

Cheers
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Fri 22 Oct 2010 12:27
P reg (1998) Toyota Celica 2.0 GT - Toyota Celica Overheating Problem - madf

Is the water pressurised? Of course if your radiator leaks , it will not be.

You have all the symptoms of:

airlocks in the cooling system

or

a Blown HG.

Or both..

I suggest a HG. If you are driving it and the coolant is boiling, you are doing your best to destroy the engine.

Sniffer test in the coolant (are you adding antifreeze when you top up? If not corrosion of cooling ways as well), compression test .. Both will says if HG gone.

Plus check and change the water pump which has probably expired through corrosion if no antifreeze.

Edited by madf on 22/10/2010 at 12:28

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Fri 22 Oct 2010 19:39
P reg (1998) Toyota Celica 2.0 GT - Toyota Celica Overheating Problem - Collos25

Head gasget and water pump aflicts just about every Celica a keep away from car for motor dealers .

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