Coolant flushing/changing - Vaux Zafira

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Tue 29 Aug 2006 15:22
Coolant flushing/changing - Vaux Zafira - Nick Shep
I have a vauxhall zafira dti, i have bought the correct coolant and amount , i have all the tools to complete the job, the question i have is, do i let the engine get up to temperature with the interior heater fans on then drain and replace with coolant or do i replace the coolant when cold and flush using cold water.


Your thought please

Thanks
Nick.
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Tue 29 Aug 2006 18:16
Coolant flushing/changing - Vaux Zafira - ChicksFan
I always start this job with a cold engine. Drop the old coolant out, refill with new. I flush out only if the old coolant is really filthy. If you put new cold coolant straight into a hot engine it could cause metal to crack as it contracts quickly. You don't want a cracked block.

Ron
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