Hi Everyone,

I changed out a leaking fuel oring line with viton ones. The fuel line still leaks but only when the motor is cold. Is viton softer than normal rubber? Anyone have any ideas how to fix this?

Thank you,

Which line?

Check that both clips holding it in palce are fully engaged. A dab of silicone grease might help.

Viton is a denser/harder compound than Buna Nitrile that is OEM.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Are you sure you used the right size as replacements? Where did you get the viton ones?

__________________
2005 Pathfinder LE
2001 E55
1998 M3
1982 320i

I know on the OM603 there is a torquing sequence where you loosen and snug it 3 times, is the OM606 turbo the same way?

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

Yes, I mic'd them to make sure they were the same size. They are clipped in. I make sure with my lighted mirror on a stick. I got the orings from fryerpower. They have been pulled out and put back in more than 3 time trying to get them to stop leaking.

which fuel line is it?

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

At the beginning of #3

Attached Thumbnails

 

That one should be 2.5 x 13mm, the smaller size in the kit.

Its tough to get in there and new orings do fit VERY snuggly, you might need to remove the line above and use a rag and channel locks to GENTLY snap the lower line into place. Be sure you hear a double click as it seats.

Silicone grease helps seal and is a good lubricant to assist you also.

If it continues to give you problems you could remove the SOV (two torx bolts) and pull lines 2, 3 and 5 out as a unit attached to the SOV. That allows you to work on those lines on the bench. Moving the windsheild washer bottle gives you enough room to do that. Spray the torx heads clean first so that your bit seats firmly.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Keep us updated on how this goes, and let me know if you need another one.

-Jim

__________________
1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

I replaced all of my O-rings with viton from Jim two years ago and have no leaks whatsoever.

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

I had a similar issue with a leak and always suspected the beginning of #3 in your diagram. It was actually the shut off valve O ring which leaks in the same area.