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problem with water flowing through overflow


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1956 TR3. Even if I only fill header tank 1 inch above the bottom I still lose water through the overflow leaving a trial of water and a puddle when I stop and have to top up every time I use the car. Have a 4 PSI rad cap fitted and no overflow tank.

Comes to mind thermostat not working but engine temperature constant at 185 F when driving and heater hose hot.

Any ideas welcome on how to sort or where to fit overflow tank as I have fitted on my TR4A.

Tony

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Is there any oil in the water (or water in the oil) just wondered if you may have a head gasket problem with a possible result of the water system being over pressurised. If not already done a compression test may give a clue.

 

Cheers, Bill

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Long shot I know but have you checked that the radiator cap is actually sealing on the lip inside the radiator top? I have seen different length rad caps and it is not obvious when you look at them. Suggest that you dry off the inside lip and put some grease round the seal on the cap fit and then check you have a full circle of grease transfer. Short reach cap and long reach neck? So Illiminate easy things first.

 

When you say top up how much are you topping up, is there coolant visible at all?

Is the over flow tip wet.

 

The reason for asking was that I had this problem initially and found the that drain tap had a weep at threads and the puddle was below the overflow pipe.

Rgds

Rod.

Edited by Rodbr
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Seconded Mike - The water level in my '3A is just visible, maybe 1/8 inch, maybe less. Any more added just gets ejected. As long as it doesn't go lower than that there probably isn't a problem.

 

Rob

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Thirded! ... and in similar vein, don't waste engine oil by filling more than halfway between dipstick min/max marks. Anything over this will disappear very quickly, espacially if you have the open crankcase breather in the block. Strange to realise many more recent TR owners are slowly learning what we old farts learned so many years ago and take for granted.

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Despite being an old f**t I had not heard about the oil level trick - noted.

+1 on the water issue, even with an overflow bottle mine still looses water until cold level is about ¼" above base of header tunnel.

 

Bob.

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