1999 Chevy K2500 Suburban 6.5 Diesel (Automatic)

[101Volts]

I changed the rear Differential oil. I couldn't get one of the bolts off so the "Pumpkin" plate stayed on. I may be changing it more than I thought because of that. The old oil looked like used engine oil, but it was not like the Transmission fluid.

On another subject, while I was working on the car I heard a racket outside on the street. Someone was driving a vehicle which looked like a Suburban; He/she went by and the car was squeaking and there was some sort of overheating going on which didn't come from the tailpipe (it wasn't burning oil) so I wonder if it was a stuck brake or if he was cooking his differential. It would be a bit funny if it was the rear differential out of oil, considering what I was doing. It slowed down and stopped as the car did, so I don't think it was a lack of engine coolant.

[101Volts]

Changing the front differential oil was easy, as there was a drain plug.

[101Volts]

Gear oil changed with Amsoil 75w90 Severe Gear and I have an appointment for the tires to be aligned on the 21st. I will say that I can see why Diesel Dave gets such high fuel economy out of his truck, I'm sure that if I had an opportunity to do a fuel economy run then I could get this to go over 30 AVG on the Scangauge once warmed up.

[deejaaa]

every time i see my 93, 4 door, 6.5, AT with GV OD, I want to drive it. it has sat for 3 yrs now. went through 3 "sets"(6 batteries!) of batteries because 'i was gonna drive it once a week to keep it in shape', but it never happened. wants are to swap a Cummins, either 3.9 4BT or 12 valve. i miss that truck!

[cRiPpLe_rOoStEr]

Originally Posted by deejaaa

every time i see my 93, 4 door, 6.5, AT with GV OD, I want to drive it. it has sat for 3 yrs now. went through 3 "sets"(6 batteries!) of batteries because 'i was gonna drive it once a week to keep it in shape', but it never happened. wants are to swap a Cummins, either 3.9 4BT or 12 valve. i miss that truck!

Sure a Cummins is great, but the old Chevy Diesel V8 still has its value. Being IDI, it's more tollerant to experiences with vegetable oils as an alternative fuel

[101Volts]

Tires are aligned. Now I can actually drive it in good confidence.

I also have a fuel tank leak near the top of the tank... It's somewhere in the top quarter of the tank, I think. It stopped leaking after I went 180-200 miles.

[101Volts]

Been driving it and enjoying it, surprisingly. As for plans:

POR-15 (Rust Prevention Coating)
Front Air Dam
Rear Wheel Arch Covers
Partial Front Wheel Arch Covers
Oil Pan, Transmission Pan and Fuel System Pre-Heaters (The last one's for winter use)
Amsoil Oil Bypass Filtration System (I'm not sure this will increase MPGs, though it'll keep the oil cleaner if it works as advertised.)
Power Steering Fluid Flush (The first flush didn't clear out all the brown burnt fluid. It did help though, and I imagine may increase MPGs a bit if old fluid has been putting extra strain on the system.)

Can this vehicle run on 100% Biodiesel without modifications? I realize that may plug up the fuel filter if I do it all too quickly, since Biodiesel loosens unburnt petrol fuel.

I'm also wondering if I should put in a filtration kit for the engine coolant. Does that increase MPGs? I was reading the sites that sell those kits say there's something leftover from the manufacturing process of a Diesel engine and a filtration kit can remove that.

Are there instructions on here about keeping the SG2 on while EOCing with a manual transmission?

[oil pan 4]

I experimented with coolant filters several years ago, back around 2008 I don't think they are worth the money, time and effort.

I do not know if that DB4 injector pump will run straight biodiesel with out any trouble. A mechanical DB2 injector pump will.

[101Volts]

Thanks. Did I mention I stuck some of this Rislone 3x ZDDP Additive to the engine oil?



Shortly after that (this has been weeks by now) I started using a Biodiesel blend (Sticker at the pump says "Between 5% and 20%") and the engine sounds like it's running smoother; I'm not sure why it is though, if it's the additive or the fuel. Nifty though and I like the fuel. I also read that Biodiesel works as a solvent and will loosen unburnt fuel which (in some cases) clogs a fuel filter - though the quickest way to find out would be to use 100% if the system works that way.

Oh, I also didn't mention this earlier; there's a rust spot (really, it's all the way through) just above the tailpipe. That has to be repaired and I have the metal piece needed, thankfully.

[me and my metro]

I am not sure about that crappy computerized pump will like b100. I do know your fuel hoses need to be replaced. I just replaced my 1/8" jumper return hoses about 6 months ago. I still have a mechanical fuel lift pump but I am only running b20.