98 E300 TD Fuel line replacement tips needed - Benzworld.org - Mercedes-Benz Discussion Forum

carl6405 · 01-14-2011, 05:44 PM

Thanks in advance for readin my post. I am working on replacing the o-rings in my fuel lines wit the more durable Viton o-rings. I was able to get one of the fuel lines off, but I am having a very hard time, pushing it back in, after replacing the o-ring. Te new o-rings are identical to the ones being replaced.

I was wondering if there is a simple method to getting it pushed back in place. Tapping with a rubber mallet perhaps?

Thanks

Kajtek1 · 01-14-2011, 09:33 PM

Should snap on with firm finger push. Put some motor oil on them if it is extremely hard.
I had bad experience with Viton orings and learned the hard way to replace whole lines with new orings on them. They are not that expensive.

carl6405 · 01-15-2011, 01:17 AM

Thanks Kaitek. I will try dropping some oil on them and see if that makes it easier.

Actually, the line I am having trouble with is a new replacement. But, I removed the stock o-ring and replaced it with the Viton. People swear by these o-rings, so, I wanted to give them a try. I would like to hear about your bad experience with these Viton 0-rings.
Thanks

Plutoe · 01-15-2011, 03:56 AM

Yep there are push fit with the locking slide. My guess is that you have the wrong size and wrong MB part.

Like suggested purchase the hose and you will have the proper o ring already pressed to the fitting. Good luck

carl6405 · 01-15-2011, 07:34 AM

Summary,
I had purchased the new fuel line, because I had broken the plastic piece when removing it. I removed the o-rings that came on the new fuel line and replaced them with the viton o-ring. Couldnt push it down in. Put the original (new)o-ring back on and it pushed in place, no problem.

Now, I had already replaced one of the lines o-rings with Viton, prior to this particular fuel line. It was hard to push back on, but it did go in.
If I have trouble with the next o-ring replacement, (I'm working on replacing all the orings on the fuel lines) then, I will just buy new fuel lines and keep and not replace the o-rings on the new line.

Thanks for the tips.

renault12ts · 01-15-2011, 07:54 AM

Good idea.

If your lines are the age of the car, then they, as well as the O rings, will be hardened. Replace the lot. Vitron is not needed. Think how long the original O rings have lasted.

Kajtek1 · 01-15-2011, 09:01 AM

My bad experience with Viton orings not necessary had to be material related. I bought a Viton kit from internet seller and install them on old tubings. The old tubings did show material aging and removal of old orings brings risk of scratching the plastic seats.
My conclusion was that the seats wear out over the years as much as orings.
Than new tubings come with orings already on them, while news say the new MB orings are better than original stuff.
Bottom line -even having Viton orings I didn't want to mess up OEM tubings.
If I will have to replace them again in 10 years, so be it.

carl6405 · 01-15-2011, 09:14 AM

Kaitek, I have to agree with you, now that I have had a bad experience with trying to get the Vion orings on. Maybe I orderd the wrong ones. But, yeah. The old lines are originals and not hard to replace when using the new lines and, not to expensive.

sokoloff · 01-17-2011, 08:39 AM

I replaced my fuel lines with new ones maybe five years ago. Popped off the O-rings that came with them and popped on the viton ones I bought from Jim at Fryer Power. Had no issues at all and no leaks so far.

Danpico · 11-01-2011, 08:19 PM

is there a kit? do you have a part number or should i just go to a MB dealership? I have a E300 1998, I see bubbles in the fuel lines.

thank you

danpico