RichardH
AKA The Mad Hat Man
Hoping that you guys can crack this one for me, before I start dismantling the cooling system.........
4 years ago , at Le Classique, we had a slow run through the pit lanes on the way back to the compound (you remember) and a few motors got perilously close to overheating (one in front of me had a sudden misting problem in the rear window). My temp gauge was reading 130 :shocked: for about half an hour afterwards. So I decided to fit an EWP80 pump with controller as an additional coolant aid that can be left running after engine shut-down. I also took the opportunity to drill a 6mm hole through the thermostat, to allow a constant bleed of coolant. This is an additional (booster) cooling device, so the water pump is still being used.
Having fitted the EWP and controller, it does a superb job of controlling coolant temperature, however ever since then it seems to push out about a litre of coolant on every run, which is inconvenient to say the least. I have added an extra expansion tank as a temporary fix which seems to work on most occasions, but this is, I feel, fixing the symptom, rather than the cause.
Do you think this is because the coolant cannot flow around the system properly and the expansion tank is being used as an escape route? Or am I missing something more fundamental? The pressure cap has been changed for one of 21PSI, so it isnt a pressure cap problem. I cant believe that the water is expanding that much and a leak-down test has shown no head gasket problem.
What are your ideas and, maybe more importantly what do you suggest to fix this?
removal of thermostat?
removal of original water pump (and if so are blanking plates available)?
4 years ago , at Le Classique, we had a slow run through the pit lanes on the way back to the compound (you remember) and a few motors got perilously close to overheating (one in front of me had a sudden misting problem in the rear window). My temp gauge was reading 130 :shocked: for about half an hour afterwards. So I decided to fit an EWP80 pump with controller as an additional coolant aid that can be left running after engine shut-down. I also took the opportunity to drill a 6mm hole through the thermostat, to allow a constant bleed of coolant. This is an additional (booster) cooling device, so the water pump is still being used.
Having fitted the EWP and controller, it does a superb job of controlling coolant temperature, however ever since then it seems to push out about a litre of coolant on every run, which is inconvenient to say the least. I have added an extra expansion tank as a temporary fix which seems to work on most occasions, but this is, I feel, fixing the symptom, rather than the cause.
Do you think this is because the coolant cannot flow around the system properly and the expansion tank is being used as an escape route? Or am I missing something more fundamental? The pressure cap has been changed for one of 21PSI, so it isnt a pressure cap problem. I cant believe that the water is expanding that much and a leak-down test has shown no head gasket problem.
What are your ideas and, maybe more importantly what do you suggest to fix this?
removal of thermostat?
removal of original water pump (and if so are blanking plates available)?