Quote:
Originally Posted by Diesel911
When you take apart the Filter take a look at the item 53 circled in Red. It is a plate that devides the inlet from the Thermostat and acts as a spring seat for both.
If you notice the plate has cutouts in it for Oil to flow. Also because of the cutouts the Thermostat cannot block the Oil Flow.
The Plate barely shows up in your scanned cross scection of the Oil filter.
In the last thumbnail item 53 is pointed to by the Blue Arrows.
The Oil Flow through the plate is the Red Arrows.
I am betting there is plenty of room for Oil circulation because the Thermostat cannot block the flow going through the plate and does not appear to block the Passage going towards the Filter Element.
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It's hard to see the details from the poor drawings but it appears the holes in the plate (item 53) is to allow oil to flow to the thermostat (item 86). The actual seal / valve of the thermostat is at the tip (item 86).
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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
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