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Hello,
One issue coming after the other, My GT6 based roadster has now successfully passed the french MOT after i rebuilt the carbs
I then have been able to drive the car from my father's place , close to Calais, to my living place, near Lyon.
My current concern is that I am facing overhatings:
2 times, during MOT and during another time I left the engin static, coolant went boiling, hopefully the motor was stopped erly enougfh to avoid major breakdown!
The cooling system that came with the car config is the following:
I have a temperature gauge, but suspect that the display part is not fitted with the correct sensor as the pointer does not go over a fourth of the face zone, so I get a temperature estimation thanks to a lowcost chinese thermometer.
Yesterday run was a 480km trip, outside temperature was arround 20°C. I was not able to drive over 55 mph (90km/h), because the car temp was slightly increasing, and have to stop every 1/2h (car temp going overs (if my chinese temp sensor is accurate) over 100 to 105 °C).
What I have already done:
I have purged the coolant, and rinced the radiator and circuit with tap water, and refilled with coolant
What I plan to do/ suspect:
Thanks for your patience if you took time to read all this, If you have any suggestion, or advice on my way to analyse the issue, it is going to be warmly welcome... I understand hox a standard cooling system works, on a standard car, I know that the manufacturer sollution was correctly designed, but on such a kitcar, I am a bit puzzled!
One issue coming after the other, My GT6 based roadster has now successfully passed the french MOT after i rebuilt the carbs
I then have been able to drive the car from my father's place , close to Calais, to my living place, near Lyon.
My current concern is that I am facing overhatings:
2 times, during MOT and during another time I left the engin static, coolant went boiling, hopefully the motor was stopped erly enougfh to avoid major breakdown!
The cooling system that came with the car config is the following:
- electric fan activated full time
- thermostat removed by previous owner
- radiator estate and model unknown, but no evidence of a bad shape
- Passenger compartment radiator (heater) installed (and running in hot position full time to help cooling)
- The cooling circuit includes an expansion tank, and an overflow Bottle (looks strange to me, but i am not an expert
- original fan on pulley removed (could not enter into the initial place as the electric fan was installed)
I have a temperature gauge, but suspect that the display part is not fitted with the correct sensor as the pointer does not go over a fourth of the face zone, so I get a temperature estimation thanks to a lowcost chinese thermometer.
Yesterday run was a 480km trip, outside temperature was arround 20°C. I was not able to drive over 55 mph (90km/h), because the car temp was slightly increasing, and have to stop every 1/2h (car temp going overs (if my chinese temp sensor is accurate) over 100 to 105 °C).
What I have already done:
I have purged the coolant, and rinced the radiator and circuit with tap water, and refilled with coolant
What I plan to do/ suspect:
- I will change the water pump, I think it is not an element that is ofently damaged, but it cannot be a bad thing to go for a new one
- I did not identify the points to bleed air from the cooling circuit (I mean the standard ones + I will probably have to add a bleeding tap of . the expansion tank is pretty flat, and installed under the bonnet, so not that higher from the other components of the cooling circuit, compared to the cars I know=> I think my bleed is the main thing to spot in a first time
- Passenger compartment radiator (heater) circuit looks to me a bit high (radiator seats at the left (UK passenger side ;-)) of the Battery), so a bit high, It would certainly be easyer to bleed with adding a bleed tap on the higher rubber hose.
- I wonder if, as the thermostat is not there, the coolant is not only partially going into the radiator, a too important part of the coolant passing only through the motor?? any advice?
- One of the Passenger compartment radiator (heater) hoses (the lower, so the return one I guess) Is made up of 2 rubber hoses, one conected to the radiator, the other one going to the font of the motor.
the 2 rubber hoses are linked thanks to a steel pipe, which is located betweek the engine block, and the exhaust manifold, as there is no support for the steel pipe, it comes in contact with the exhaust manifod, which is mybe not a good idea. - If the bleed does not solve the issue=> radiator expert to rebuild the radiator & motor expert to define if the way the cooling circuit has been assembled does not show big issues
Thanks for your patience if you took time to read all this, If you have any suggestion, or advice on my way to analyse the issue, it is going to be warmly welcome... I understand hox a standard cooling system works, on a standard car, I know that the manufacturer sollution was correctly designed, but on such a kitcar, I am a bit puzzled!
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