Al Massey Posted November 9, 2014 Share Posted November 9, 2014 Alright guys, I think I have a problem but I'm not sure. Firstly does anyone know how fast coolant would be pumped out of the top rad hose by the pump? And could a dodgy thermostat be partially blocking the flow of coolant? The reason I ask, is after my previous issues, sorting it all out, I thought I had a blockage in the coolant system. The engine block gets quite hot, the top rad pipe is a hard pipe and gets quite hot. And I've just checked the flow of coolant and it's not as fast as I thought it would be. I could be wrong and it's all fine. Quote Link to comment Share on other sites More sharing options...
Scott Posted November 9, 2014 Share Posted November 9, 2014 Thermostat and rad cap would be the obvious changes. Thermostat sticking closed would create a blockage, rad cap not releasing would cause high pressure. Quote Link to comment Share on other sites More sharing options...
Al Massey Posted November 9, 2014 Author Share Posted November 9, 2014 Thermostat and rad cap would be the obvious changes. Thermostat sticking closed would create a blockage, rad cap not releasing would cause high pressure. I've put on my stock rad cap and it is the same, I don't k ow if there is a blockage of any kind. I do know that coolant is flowing through the system once hot. Quote Link to comment Share on other sites More sharing options...
Scott Posted November 9, 2014 Share Posted November 9, 2014 I've put on my stock rad cap and it is the same, I don't k ow if there is a blockage of any kind. I do know that coolant is flowing through the system once hot. If the top rad hose is harder than it should be, then the rad cap is at fault. Everything should get quite hot, 90-100 degC is pretty hot afterall. If your expansion tank is rising and falling with engine temps then that would suggest the cap is OK. If the temeprature doesn't go past the middle range of the gauge then that would suggest that's OK. If it does go past the centre then firstly try to properly bleed the radiator (heaters on full, on as steep an incline up the way as you can find, 3k rpm while keeping an eye on it over-flowing. If that doesn't help then replace the thermostat and see if that fixes it. If it doesn't it's time to start some proper investigation. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 10, 2014 Share Posted November 10, 2014 Does it boil fluid out on a run, or get into or very bear the red on the stock gauge? Does it use water? If no it's almost certainly 100% fine. Quote Link to comment Share on other sites More sharing options...
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