Mustang5l5's Progress Thread - Archived Progress thread '08-'20.

They should all be 5/8-11"

Seller claimed they worked with all heads, stock of aftermarket. Clearly they were machined wrong.

A 5/8-11 bolt fits perfectly into the hole. The TFS plugs fit easily.


UPDATE: Seller claims a bad batch. Sending me 4 new ones.

You make good points. The OEM lines are probably more robust, but unsure how well I could clean them up, or if the crossover lines can be easily replaced and still be robust. My concern is 31 year old rubber line and E10. Last thing I want to do is lose my car in a fire due to a split line.

Regardless, I have some time. Let me see if the stock lines will clean up well

HotFox said:

You cant buy a new one or have a NOS one stashed away? Lol

I dont think ruptioning is a big issue with the ethonal other wise there would have been a bunch of burnt cars and some nice lawsuits.

Click to expand...

No, but I found a fairly cheap 94-95 rail on eBay with regulator. I might pick it up. I’ve made an offer. Much cleaner than my current rail.

Decided to tackle my leaking low oil sensor. This thing has been a major leak for a decade.

I did replace the gasket with an LMR repop. When I removed the sensor recently, it had cracked.

So I ordered an OEM gasket. Part number E4AZ-6C646-B. Right away I notice that the raised ridge is a lot softer than the LRS repop.

But, i suspect the sensor is leaking internally, so I pull it apart. Fairly easy to do. Remove the clip, tap out the blue rubber insert, and then carefully pry up the retaining ring. Then pull out the sensor core with needle nose.

Shot of the retainer ring installed once blue insert removed

The core


Exploded view


Just as I suspected, a lot of leaking oil past the seal, which is the black gasket. It was hardened. I thought the raised ridge was an o ring, so I tried to remove it and damaged it. So now it’s junk.

A repro is $100

So I ordered a 20mm x 1.5 drain plug off Amazon for $3. I’ll deal with it some other time.