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I have a '96 Hummer with the GM 6.5 TD. Coolant has turned a reddish/rust color so I'm going to do a flush. What coolant is the latest and greatest for this engine? And to do the flush do I need to use any flushing liquid or just distilled water? Thanks for any advice.

Thanks. I've got a new relocate kit and two FSDs from Leroy on the way.

Just wonder who is selling the most reliable FSDs these days. My 1996 Hummer has the 6.5TD and a grey Stanadyne FSD like this one from A1Customs. https://www.a1customs.com/pmd-fsd-resistor-stanadyne.htm Is that a reputable vendor? Is there someone else you'd prefer to buy from? Thanks.

Mod Mafia claims they sent me the correct part for my truck, but they're checking with their techs to see what issues they've had with the 6.5. This is definitely not the right part for my truck. Does anyone have photos of this Mod Mafia fitting installed on a Hummer?

Furthermore, trying to thread the Mod Mafia part into the top of my IP has it so up against this cylinder that there's no way to even rotate it in. I'm getting the "I have the wrong part" vibes. Which I may be misinterpreting as "I don't know where this is actually supposed to go." Looking for...

I just pulled the fitting from the top of my IP, but it definitely does not fit the threads on the Mod Mafia part. The IP fitting can fit entirely inside the MM part without threads even touching. I have not yet tried to see if the MM part threads into the IP. My understanding was that the MM...

Does this guide look like reasonable instruction for how to apply the Gasoila thread sealant?

Is this the right one?

Paul at ModMafia told me that he uses thread locker on any fitting that doesn't have an o-ring. What kind of thread locker should I use?

No, I mean the small silver circle set into the body of the barrel, not the threaded hole for the fuel pressure gauge.

Finally got my ModMafia fitting today. What is the significance of the metal circle set into the barrel of the fitting?

To install this adapter do I unthread the barbed fitting from my IP, thread the Mod Mafia adapter into the IP, and then thread the IP's barbed fitting into the Mod Mafia part? And when you don't have a pressure sending unit or pressure tester attached to this, what plugs the hole in it?

The drain valve in my wheel well was slower than a seven year itch so I disconnected the hose to it and drained the FFM all the way. As expected, its rather dirty. Should I pull the FFM off, clean it, and replace all of its hoses? Also, I can feel the little round screen over the center piece...

Confirmed. Pump is pumping fuel and in the correct direction.

I've replaced my lift pump with an ACDelco EP158. Hooked everything back up, installed new fuel filter, attached hose to vent on cap, unscrewed vent 1/2 or so. Now I'm turning my key to run and listening to the pump cycle. It does and glow plugs cycle too. I have keyed up many, many times now...

This brass fitting that allows for the attachment of the fuel pressure gauge. What is it called? Even better, does anyone have a part number for it? Thanks.

I found this EP158 on Amazon for $70. https://www.amazon.com/gp/product/B000C9OSQG/ Called my local Napa and they quoted me the same thing for $260 and it has to be shipped up from Oregon. Are Amazon and Napa talking about the same thing or could there be some confusion about the model number...

I've had this Carter pump from Napa sitting around for a while now as a backup. Is this any good as a long term fuel pump?

And here's that same jar of fuel after sitting in the dark in my shop for almost two weeks. Doesn't look a bit different to me.

What type of sender would that be? I don't think I understand what you're suggesting.