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Old 22nd March 2024, 07:41   #2
SD1too
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Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

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Quote:
Originally Posted by Dave View Post
... the matrix pipes were red hot.. It then went cold after ten miles and the top matrix pipe was noticeably cooler than the bottom one.
I'd activate the digital temperature display Dave to see what the engine is doing. If that shows a stable temperature, your heater matrix might benefit from a more rigorous flushing.

Here's my tip. To deter scale formation in the matrix, use de-ionised/distilled water for your coolant mix. It's available from a good motor factor for a few pounds and is well worth it!

Simon
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