Sep-2006, nationwide.TheDieseliminator wrote:I'm wondering can we buy seals for the LD28 injection pump that will prevent it from leaking once we start running the ultra low sulfur diesel fuel that the U.S. will be receiving pretty soon?
This seal looks to be the right size & is viton (non-reactive with BD, and should not swell/accel wear with ULSD). I think that's the seal I'm recommending right now.
[Later edit: that seal's the wrong size for the LD28's IP shaft. Read this thread for more info, and the correct seal.]
Seals: some IPs will leaks, others won't. The Bosch VE IPs (some VW, some Nissan, others) is known to be a leaky design, regardless of fuel, but ULSD and BD accelerate the leak rate.All my dad and I drive are 80's diesel vehicles and I'm wondering if we'll have to change the seals on all the injection pumps in all our vehicles to accomodate this new diesel fuel that supposedly doesn't lubricate as well as our current diesel fuel that we use in the U.S.
Lubricity: It's not that the sulfur is a lubricant as much as the process to remove sulfur from high-sulfur crude tends to remove/reduce the lubricating properties of the finished diesel. We went through this back in 1990 when the diesel we had then went to Low Sulfur Diesel (~500 ppm sulfur, the fuel we are using now). Many IPs began wearing prematurely, and fuel refiners and distributors quickly added additives to compensate the lubricity of the LSD. IMO, this is what's going to happen this time around too. BD may be the "additive" this time, depends upon politics and lobbying.
I don't know. Other VE IPs are also leaking in other places, notably the top cover. Some leak at the o-ring between the distibutor head (cast steel) and the IP housing (aluminum). The top cover seal is easily replaced (on VW installations); the distributor body o-ring isn't.Dr. Jones wrote:As far as the IP goes all we need to do is replace the front seal and will this make our stlye pump be as relible as with PD?