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Just thought I'd share a little experiment I did on my Surf. Being of a slightly paranoid nature when it comes to my 2.4, I am constantly looking for ways to monitor my coolant. On another forum I saw a bit about coolant filters on larger diesels (american trucks) and thought little of it until I realised I would be able to look at the coolant condition without opening the rad cap. It has always bothered me that I can't do this on the Surf in the way I could on anything with an expansion bottle like my old VW.
So a couple of weeks ago I fitted a glass fuel filter in the line to the rear cabin heater. I had removed the heater a few years ago anyway so it was redundant.
This is what I found when I looked at it yesterday:
Emptied out:
Keeping in mind that this is on a bypass from the main flow of coolant, that looks like quite a bit of crud to me! I fitted a new head about a year ago and have done 4000 miles since. It has been thoroughly flushed three times in that time but it looks like I still have a reservoir of crud somewhere.
So a couple of weeks ago I fitted a glass fuel filter in the line to the rear cabin heater. I had removed the heater a few years ago anyway so it was redundant.
This is what I found when I looked at it yesterday:
Emptied out:
Keeping in mind that this is on a bypass from the main flow of coolant, that looks like quite a bit of crud to me! I fitted a new head about a year ago and have done 4000 miles since. It has been thoroughly flushed three times in that time but it looks like I still have a reservoir of crud somewhere.
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