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I believe drum brakes auto adjust when reversing. Do a couple of quick stops in reverse to get everything synchronized up.

So SKF is actually recommending preload on tapered roller bearings for longest life. I guess that means some drag is acceptable. I wonder how backing off to the first key affects the preload. https://www.skf.com/binaries/pub12/Images/0901d1968065f1f4-Bearing-preload_tcm_12-299896.pdf

Definitely an option. The way it sits right now, I only ran in to one of the mounting holes. The arm also has the wrong bend to it and hits exhaust and the eventual doghouse. I'm going to try putting the 3rd bolt hole in the doghouse and use standoffs on the other two. Then I just need to...

Yokohama has decent prices on 37x12.5-17 tires. I'm not a HMMWV guy but where did the 18" rim size come from? It seems like you're shooting yourself in the foot with an odd ball wheel. I believe I paid $1700 for 5 tires in 37 on 17 inch rims.

The engine will start without glow plugs at 80F after about 30 seconds of cranking. But, you're not getting any white smoke out the exhaust? That means no fuel. Disconnect shutdown solenoid wire. Open the valve on the top of the filter housing and crank until you have fuel coming out...

When stored wet or without properly treated coolant, corrosion in the water pump can tighten things up though I would expect the belts to slip.

Glow plugs are a lot easier to pull. Sounds like you have a cylinder full of water or fuel.

It is possible to convert. You can install a threaded rod with Loctite in the angled hole, cut off flush, and drill new straight holes. I wouldn't recommend this for your case because it won't likely save you anything vs exchanging but if anybody sees a screaming deal on some center mount...

The C code engines connected the ports left to right bank in the intake manifold. It helps reduce the exhaust drone sound at certain engine speeds. The C code engines also had a muffler before the air cleaner.

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...