Diesel RVs: Re: [diesel_mercedes] Rebuilding a 91 350SDL

Rusty,

MaBenz will rebuild and fix these for free, if it has not already been upgraded. (Note: this is rumor, not something I have done.)

You and the re-builder need to carefully check several items, to find out what went wrong, and correct it.

1. Empty the oil and check if it seems OK or if it has been "polluted".

1. A. Is the level about what you expect or is it over full?

1. B. Is the oil diluted by the B95?

1. C. Is the oil jelled?

If A and B, then check the rings for letting the fuel gets passed and the injectors for being clogged. If either, heat the fuel more before it gets to the injection pump.

If A and C, then your transesterfication is not converting all the oil to bio-diesel. Veggie oil is not compatible with engine oil.

2. Are the rod and main bearings bad? If so, check the oil and see A-B or A-C.

3. Are the injectors slightly clogged or grossly clogged?

If slightly, get new injector nozzles and rebuild injectors.

If grossly, get new nozzles, rebuild injectors, and add more heat before the IP.

Good luck,

Bobby

On Wed, Mar 6, 2013 at 10:31 PM, rmh3_98 <rmh3_98@yahoo.com> wrote:

I'm am having my 91 SDL rebuilt after it died a while back. Not sure what killed it yet as we will learn more after we crack open the engine. I have run bio diesel in her for about the last 100m miles. I am pretty sure that this had an impact on her demise. I am also prepared to find the infamous "crank arm" issue. We are planning to upgrade to heavier crank arms to start.

My question is "What would you modify, replace or upgrade during the process?"

I plan to continue to use bio diesel. May blend it down a bit below B-95 though.

Suggestions or directions to other sources is greatly appreciated.

Thanks,
Rusty