|
Post by floog on Feb 14, 2007 8:15:48 GMT
In the near future I'm going to give Greta a service, and wanted to change the coolant I understand the basics: Lift tank. Undo drain bolt. Undo radiator cap. Unbolt overflow tank and drain. Redo bolts and drain bolt. Fill up radiator. Fill overflow tank etc. Then it get's way too technical for my poor brain Do you REALLY have to hook up an external fuel source with the tank off and run the engine and then fit gizmo's to measure pressure etc Is there a simpler way?? Anyone done it and have some tips please
|
|
|
Post by firmhand on Feb 14, 2007 10:54:26 GMT
I don't see why, you would surely only do that if you wanted/needed to pressure test the system for some reason or another. If your just doing a straight coolant change i wouldn't bother personally, just fill the system up very slowly with the correct quantity/mixture of coolant antifreeze, bleed the water pump (as i recall two bleed bolts) and give all the flexi hoses a squeeze to expel any air that could be trapped, then run the engine up and recheck level. Only thing that bothers me with the R is the lack of a temp gauge so the first you would no of her overheating would be fan cutting in. As always FLOOG I'm no expert and have never done the Rex (planning on swapping to silicone hoses in blue maybe next year tho ) but have done various cars over the years. Anyone else.
|
|
|
Post by Burchy on Feb 14, 2007 11:25:37 GMT
:agreed: When i did mine recently I just filled it slowly and squeezed the hoses a bit to get rid of the air. I did actually go for a run, with an eye on the temp gauge and then came back, left it running until the rad fan cut in then turned it off. When cold I whipped the tank off again and topped it up as there was still a bit of room for more fluid no problems since
|
|
|
Post by ZRX Gremlin on Feb 14, 2007 15:57:23 GMT
:agreed: That's roughly the way I did mine although I did use the bleed screws as well. No problems here, what ever the pressure is. I would assume that low pressure, probably caused by air in the system, would be the primary xcause of any subsequent overheating problems.
|
|
|
Post by floog on Feb 14, 2007 16:27:30 GMT
Thanks peeps for your help
|
|
|
Post by lightspeed on Feb 14, 2007 18:00:35 GMT
Unless you'd removed hoses, etc. (which isn't necessary for a coolent change) I don't know why you'd bother with a pressure test.
Draining, slowly filling, working the hoses to get bubbles of air out and the bleed by the filler neck should result in a full, fluid-filled system. Take it for a run, let it idle till the fan comes on, then checking levels in the overflow tank and the filler neck should be all that is required.
|
|