7 replies to this topic

[stormintrooper]

Basically i replaced my thermostat the other day and the endinge quickly got too hot but not the radiator, i bought an 88C one from ebay and when i unpacked it i noticed there was no little hole with that funny ball like thing in it

the over heating was never a problem before and im stumped as to why the rad is cool when engine is hot

only thing different is the thermostat

[dklawson]

When you refilled the system did you simply fill it, place the cap on and start driving? If so, you may simply not have a full system. With the car parked, remove the radiator cap, fill the radiator, start the engine and be standing by with more coolant as the engine heats up. When the thermostat opens the level of fluid will suddenly drop in the radiator. Add more to fill it again. Wait a bit longer to make sure you don't need to add more, the fit the cap and take the car for a test drive. That should completely fill the system. In fact, when you stop the car is likely to belch out a bit of extra coolant when filled this way.

[Dan]

The float valve only serves to release pockets of air that would otherwise get trapped under the thermostat and could stop it from sensing the coolant temperature properly. Are you sure you fitted it the right way up?

[il-barba]

do you have a bypass hose, or any form of bypass?

[stormintrooper]

yes i have a bypass, yes its the right way up and yes was filled with engine running with rad cap off

this valve thing spoke of, coul not having one be the source of my problems?

[il-barba]

it shouldn't be a problem if you don't have it. why not remove the thermostat and check it in a pan of boiling water to see if it opens

[stormintrooper]

i mean in the sense of if air is trapped underneath the hot water isnt reaching the thermostat to make it open

[il-barba]

the bypass hose should eliminate that. or else remove the thermostat housing and thermostat and begin filling the system bit by bit. eventually coolant will rise till where the thermostat sits and drop it in there. but if you open up the system just test the thermostat in hot water. sometimes they can be faulty