Originally Posted by Linds
Reply With Quote
Linds, My t'stat also takes a quite a few k's/mins before it opens up. and is a relatively new item...pot bench tested etc.
I reckon that with the bypass purge line the engine is effectively continually mixing quite a stream of 'warm block' coolant with 'cold' coolant downstream of the t'stat (radiator, exp tank, hose etc), which may explain the time taken amongst other items as discussed.
I am a bit paranoid about the purge line becoming blocked (as it was when I purchased my Disco) so every so often shine a LED lamp on the side of the expansion tank (clear type) and can easily see a surprisingly strong flow that comes from the bleed outlet on the t'stat housing....this flow also sucking in cooler radiator fluid.
ps. when I bleed mine if I have pulled hoses off everywhere etc, I unscrew the expansion tank mounts and carefully raise it above the engine and heater hoses etc as someone here had done (sling it with some string from the bonnet catch), then add from there, thus highest point in the system and some good head to purge through to t'stat bleed. But if your purge line is the factory piece (with venturi) and working well, probably just the service manual way is good enough.
Bookmarks