Quote:
Originally Posted by Beagle
Your comment makes no sense  I think you had better read my first paragraph again  . |
"It is perfectly normal for a bubble of air to be trapped in the pre-filter – in reality it is not trapped there. Air is entering the primary filter continuously as it is flushed out of the pre-filter and the Primary filter is designed to cope with it.
The source of the air is fuel foaming in the tank as it sloshes around - ever filled your tank right to the top and had to wait for all the lather to settle?"
If you stick a longer Fuel Inlet Hose (as a test) into a small separate Container of Diesel Fuel it cannot slosh around and Foam. Yet, you will still have a stationary bubble in your Plastic Primary Filter.
The Bubble in the Primary Plastic Filter must be stationary because no Air is being pulled in from the small Container of Fuel to keep the Bubble filled up and the Bubbles size does not decrease.
So I believe the Air Bubble is indeed trapped inside of the Plastic Primary Filter.