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If you like your 2-stroke diesels it was Clean Cams Technology Systems that built overhaul kits that basically made the engines compliant with 2010+ emissions standards. This is one of my tier 2 compliant 6-71 engines coming out in 2021. We got funding to replace the engine 3 years ahead of its...

I am currently installing a 2004 vintage 6.5 engine in my CUCV. I bought it sight unseen on eBay. I'm guessing it has 100-150k miles. I pulled the heads to renew gaskets and there was valve recession and cracks. American Cylinder head in Oakland CA installed pins in the cracks. They seemed...

The GM pre-cups are smooth on the interiors. Here is a pic of the inside of some Amazon units.

The part that makes me leery of the aftermarket heads are the pre-cups. It's a very special material, I think Nimonic 80. I don't believe the Chinese pre-cups are cast from the same material. I don't have any experience with aftermarket heads so I can't share anything beyond this.

Did you have an obvious blow-out in the head gasket? Cracking between the valves is essentially normal for these engines and I don't think it is detrimental. I think that relief cut in the face of the head is there to encourage cracking to occur in that area. The guys repairing them are using...

I actually built a pair of 6-71 engines that met US EPA Tier 2 emissions requirements. Basically, they ground all the lift off the cams and then added a turbo to bring the power back. It was similar to EGR but all done in cylinder.

Run it with the radiator cap off and watch for bubbles in the coolant.

The people with the knowledge are all probably dead by now but it wasn't unheard of for truckers to get a reliable 500hp from an inline 6-71. The 2-stroke is a very long engine due to the air box.

Relays can get permanently magnetized which causes them to stick on.

ARP's newer studs have sockets for Allen keys so you can run them after installing the head. Yes, it should take very little clearance to use studs provided you hold them in the head prior to setting it on the block.

On your 6.2/6.5 engines use an OEM black RTV or "The Right Stuff" for all of your sheet metal items Do not use RTV in places oil can pool such as your lift pump adapter plate. RTV is permeable and will weep oil if submerged. Use anaerobic gasket maker for machined surfaces such as your timing...

Ok, I have done the math. These numbers are slightly approximate and remember, this is the Dana 60 as that is what I have apart. I measured 12.3 threads per inch on the nut. That means each turn is 1/12.3 inches of movement. I counted 16 holes in the locking washer. It is reversible so it has...

There shouldn't be preload. Tapered roller bearings need 0.001-0.003" of clearance. This applies to a very wide range of applications. I would think the 50ftlbs is to seat the bearing and each locking position is 0.003" apart. So, as long as you've backed it off and stopped by the next locking...

I have wired up other generators in 12 lead before. I don't see why this one would be different. 416V is close enough to 480V you should be able to run at full rating. You would likely have to derate for 380V. Depending on the type of sensing for your AVR, it it wants 200V range you simply sense...

I don't know this application specifically but a little lube can help the parts slide past each other. You MUST NOT use petroleum based lubricants for the EPDM rubber seals. Use silicone or Teflon based lubricants only. Your DOT 5 brake fluid actually works well here as it is silicone oil.

Did you lubricate it?

RockAuto has them. https://www.rockauto.com/en/catalog/chevrolet,2001,express+3500,6.5l+v8+diesel+turbocharged,1371383,engine,rocker+arm+retainer,10316 Half price of everybody else. Real GM part.

If you're going to run a 10w30 oil it needs to be an API C oil, not API F. For example, Chevron Delo 400 SDE is ok. Chevron Delo 400 ZFA is not ok.

Anything you want. I had to cut right up to the rivet nuts for the glow plug ballast resistor. I have not renwed the body mounts yet. I went this route with the intention of adding air conditioning in the future. You're going to have to build a small doghouse to clear the exhaust but the gas...

The only. Serious problem I see on these engines is the fire ring of the head gasket wears into the top deck of the engine block. I put Cometic gaskets in my engine but they require a specific surface finish. I'm not a big fan of Cometic products, either.