Sealing primary fuel filter bleed screws yanmar 2GM20

[blan321]

I have fitted new copper washers and checked for burring on both bleed screws, and tightened as much as i dare, but they still weep. Threads not stripped. I have bled anout 3 times with the new washers, over 9 months this year, so they may have work hardened, but changing them this frequently seems wrong. So has anyone used a bettee solution such as red fibre washers, or Dowty washers (dont think they will work as bleed screws threaded to shoulders i think.
Thanks!

 

[vas]

Was so annoyed with them leaking that I ripped the filter out and replaced it with a filter/water separator...
V

 

[VicS]

I have fitted new copper washers and checked for burring on both bleed screws, and tightened as much as i dare, but they still weep. Threads not stripped. I have bled anout 3 times with the new washers, over 9 months this year, so they may have work hardened, but changing them this frequently seems wrong. So has anyone used a bettee solution such as red fibre washers, or Dowty washers (dont think they will work as bleed screws threaded to shoulders i think.
Thanks!

Why not anneal them. Heat to dull red and allow to cool ( quench if you are in a hurry , it makes no difference)

 

[Spyro]

I've used dowty washers on the secondary Yanmar filter with banjo bolts. I'd try them on the primary if I had your trouble. Don't see why threaded to the shoulders would matter.

 

[Freebee]

another vote for dowty washers!!

 

[blan321]

Thanks, i am not inclined to re anneal them (again and again it seems), i dont carry a blowtorch on the boat and dont want to juggle with them on the gas stove!
Sounds like one positive for dowty washers do will pull the bleed (ing) screws again and measure them!

 

[blan321]

Sorry two for dowty!, thankyou

 

[DownWest]

Looked a consistantly seeping banjo bolt on a filter. Several tries by previous bods, even to changing the body, but still a tiny drip. After trying the usual fresh washers, I got a magnifing glass on the bolt. There was a tiny fault on the mating surface, prob from clumsy spanner work. Couple of touches with a fine file, sorted.

Dowty washers are great, but not sure about their use here.

 

[NormanS]

It's very easy to anneal them aboard if you have a gas cooker. Simply form a hook on a small piece of wire (you do have some seizing wire aboard?). Use the hook to hold the washer at the top of the flame on the cooker, and then do what Vics says.