300 Tdi Oil leak near oil cooler lines or below and left of fuel lift pump

Quote:

---

Originally Posted by rick130

From memory you have a hardened washer, spring and the t/stat, and that all has to be depressed and pushed in square by the union assembly and thread in the two small cap screws at the same time and not have it go off centre.

---

I didnt see any washers unless its behind the spring assembly.

Quote:

---

Originally Posted by loanrangie

I didnt see any washers unless its behind the spring assembly.

---

Can't remember the order, but there's definitely a hardened washer there that the spring sits against.

Quote:

---

Originally Posted by rick130

Can't remember the order, but there's definitely a hardened washer there that the spring sits against.

---

Yep, fits around the thermostat spring part. Couldnt get an O-ring the right size but it only lost maybe 100ml over a 1 week period so not too bad.

Well after nearly ten years of no leaking the oil cooler lines that I got Pirtek to make up have given out.

Not a bad run, when I took them in the guys at Pirtek they were a bit surprised as the hose has started to delaminate. Thought it could be heat related?

Now to dob myself in for being a newb when I went to refit new cooler lines and they would not fit into the oil cooler housing no matter what I tried. Gave up and had a sleep on it thinking possibly the thread was stripped etc. wasn’t until I was reminded to use a mirror to inspect the housing that I found the old o”ring seal still left inside preventing the new hose end from fitting properly! Thanks SW

10 year update on a thread... love it. [bigsmile]

Quote:

---

Originally Posted by loanrangie

Yep, fits around the thermostat spring part. Couldnt get an O-ring the right size but it only lost maybe 100ml over a 1 week period so not too bad.

---

Only 4 years ago......👍

Gday @loanrangie, Mine has developed this leak. Do you remember how you sorted this out?
Is the leak due to a failed O ring?
Sounds and looks to be an awkward job.
I assume the O ring can be sourced from a good parts seller?
Did you use a gasket or rtv?