Return line T-fitting

[btoscano]

Hey all,



I am wondering how common fuel leaks are at the T-fitting diesel return line on the block near the firewall? I noticed a LOT of slop in the line that goes to the injection pump and am not sure I want to leave it like that!



I am wondering if some/most of my oil leak is actually fuel mixing with oil!!



I also asked this in my other thread about the tappet gasket, but figured it was also worthy of its only thread.



Brian

 

[Greenleaf]

They are sealed with a rubber (quad) ring. So, yes, they do move around/pivot a bit. There is no/little pressure on this line.



I find that when the nut is bottomed out (will not tighten any further) the line will still pivot a bit. The rubber is tightened down around the ID of the nut and the OD of the copper line.

 

[btoscano]

Okay, thanks.



I would have a lot of leverage on the line by the IP fitting so some movement is probably with the rubber seal.



I tightened up the fittings a little.



Do you ever need to change that rubber in your experience?



Brian

 

[Greenleaf]

No... . never have.



GL