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Help Flushing Coolant (x-post)

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I noticed some wild temperature swings yesterday (on a very cold after a short but very spirited run) which incidentally don't match what Freescan says (i.e., the fans come on at about 92 when the gauge reads over 100. very odd), but anyway...

I noticed that my header and expansion tanks are almost empty. The tank is also filled with a lot of pink deposits on the walls. Is this typical?

Anyway, I think I'll flush it. I have the service notes, but I don't know what coolant product is best, how much to buy, and was hoping you all might have other tips.

I appreciate it!

Luke Colorado, Super Spy.   -  Lotus Owner No Longer

1987 Zender Widebody 560SEC | 1994 Lotus Esprit S4 | 2013 Honda Fit EV (#269)

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The gauges are hugely inaccurate - I seem to recall reading a thread on this somewhere myself.

Freescan is telling the truth, the gauge is lying! :blink:

"When I was a kid I used to pray every night for a new bicycle. Then I realised that the Lord doesn't work that way so I stole one and asked him to forgive me."


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i have heard of alot of people just putting just coolant in rather than a water and coolant mix its suppose to keep the temp down, but my gauge is also the same seems like its going into red before fans cut in but they always do gauges on these cars not acurate.

You did say that your header and expantion tank were empty when you checked i would be worried about that?? i dont want to look like im teaching you to suck eggs but have you checked for leaks these chambers should always have coolant in them?? :blink:

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